Teaching Portfolio Justin F. Shaffer, Ph.D.SPIRE Postdoctoral
Fellow, University of North Carolina at Chapel Hill Visiting
Lecturer, Department of Biology, University of North Carolina at
Chapel Hill Former Adjunct Professor, Department of Biology, North
Carolina A&T State University Last update: January 2013
Contents 1. Teaching Responsibilities 2. Teaching Philosophy 3.
Teaching Methods and Strategies 4. Course Materials 5. Evidence of
Student Learning 6. Teaching Evaluation 7. Efforts to Improve
Teaching 8. Educational Outreach 9. Future Goals 10. Appendices
Appendices A. Teaching experience B. Sample syllabus C. Sample
lesson plan D. Sample exam E. Sample worksheet F. Pre- and
post-test data G. Student evaluations H. Faculty evaluations
Teaching Responsibilities As a SPIRE (Seeding Postdoctoral
Innovators in Research and Education) Postdoctoral Fellow at the
University of North Carolina at Chapel Hill, I have been trained in
pedagogy, effective teaching strategies, and course design. I have
been able to use my training as an Adjunct Professor in the
Department of Biology at North Carolina A&T State University.
During the Spring 2012 semester, I taught Biological Sciences
(Biology 100), an introductory biology course, to 71 non-major
undergraduate students. During the Fall 2012 semester, I taught
Designer Proteins and Society (Biology 642), a novel course of my
own design. This course was a mixed lecture and lab course that
explored the recombinant protein design and production processes
and their link to medicine, industry, and agriculture. This course
also included a 5-week laboratory module where students expressed,
purified, and assessed dihydrofolate reductase (DHFR), an important
enzyme involved in nucleic acid synthesis. I taught this course to
16 undergraduate and graduate biology students. During the Spring
2013 semester, I was a Visiting Lecturer in the Department of
Biology at the University of North Carolina at Chapel Hill where I
taught Biology 101 (Principles of Biology) to 400 undergraduate
students in an active, student-centered classroom. More information
about my teaching experience is listed in Appendix A. Teaching
Philosophy While teaching my first college science course (an
introductory biology course for nonmajors), I realized something
and knew it to be completely true: I love teaching and I want to do
this for the rest of my career. This was a great feeling to have,
but I also needed to ask myself this important question: why do I
want to teach? After racking my brain and writing down a long list
of things, I came up with what is an ultimately simple answer (the
essence of my teaching philosophy if you will): I want to get
students excited to learn about science. This short statement sums
up who I am as a teacher. Everything that I do as a teacher, from
the way I teach, to my interactions with students, and to community
outreach, all comes down to the fact that I want my students (and
society as a whole for that matter) to appreciate, understand, and
ultimately be excited about science. I believe that student
excitement and engagement are the foundation for improving
scientific literacy, building solid critical thinking and analysis
skills, and preparing for successful scientific and technical
careers. For those students that already really like science, I
want to cultivate their interests and help them prosper into the
scientists, researchers, doctors, and engineers of tomorrow. I like
to say that I know that I wont ever find a cure for cancer, but
maybe I will inspire a student who will someday do just that.
Teaching Strategies and Methods My teaching style revolves around
backward design (i.e. determining student learning objectives
before classroom activities), student engagement, and having a
studentcentered classroom. Putting my learning objectives first
allows me to efficiently plan lessons and to focus on the key
concepts that I want my students to learn. I believe that if my
students are not engaged then I cannot properly teach them the
material at hand and that they will not learn effectively. I use
many active learning techniques, interactive
lecturing, real-world examples, case studies, and technology in
order to engage my students. I also use formative in-class
assessments to gauge what my students are learning and
understanding. Class session structure I start each class session
on time and end on time, and I try to use every minute in between
as effectively as possible. I write on the board the list of topics
that we will be covering in the lesson so that my students know
what to expect, and I also write a list of any important class
announcements (which I then email to the class afterwards). If I am
using PowerPoint slides, I make them available (with missing
information and blanks) to my students the night before so that
they can print them out and take notes on them during class. I
begin each class session with a list of the learning objectives for
the day, and as we achieve them during the course of the class I
make sure to tell my students that they just did so, which can
bolster their confidence in learning the material. Throughout a
typical class period, I use interactive lecturing interspersed with
5 7 active learning activities. I encourage students to ask
questions, and I take the time to answer them and make sure
everyone is following along before I move on. I plan my lessons so
that they will fit into the allotted class time, and usually I am
able to do so. If a lesson is running long, I do not rush through
the material at the end in order to fit it all in; rather, I
present the lesson without rushing and catch up the following class
session. Please see the following section (Course Materials) for
more details on my lesson plans as well as Appendix C for a sample
lesson plan from my Spring 2012 Biology 100 course. Active learning
methods In order to engage my students during class, I use a
variety of active learning methods that requires them to interact
with each other and myself. Research has demonstrated that students
learn more when they are actively engaged in class, and I also
think that these techniques are fun and more interesting than
traditional lecturing. I use the think pair-share technique when I
want my students to come up with an answer to a question (e.g. Why
are cotton bath towels so water absorbent?). I also encourage my
students to talk to each other when brainstorming to come up with
lists of ideas about topics, such as the causes and effects of
global warming. In order to do group work, I have used the jigsaw
method to teach my students about cellular organelles and also
about animal diversity. The use of real-world examples and case
studies (see below) are also extremely useful in actively engaging
my students during class. Active learning techniques can also
provide feedback to me as the instructor about what my students are
learning and what they are having troubles with. I used Poll
Everywhere, a variant of the personal response system, and one
minute papers to collect formative assessment data from my students
during or at the end of class. Please see the below sections for
more details on how I used these methods in class. Real-world
examples and case studies Real-world examples and case studies are
two of the most important tools in my teaching arsenal because they
provide a direct link between the course material and my students
personal lives. When I use case studies, my students interest
levels pique and they become more engaged in the class session. The
story-like manner in which case studies are presented leaves them
hanging and wanting more, and they eagerly await the end of the
case, while simultaneously learning
the lesson material. I used several cases from the National
Center for Case Study Teaching in Science
(http://sciencecases.lib.buffalo.edu/cs/) during my Spring 2012
Biology 100 class to teach cellular respiration in the context of
energy drinks and marketing claims (I drank a Red Bull at 930am
during class to see how much energy (or jitters) it would give me),
to teach mitosis through the story of a 20-year old student that
had ovarian cancer, and to teach meiosis through the process of sex
determination and gender testing of athletes. I also incorporate
real-world issues in my lessons that pose ethical dilemmas, such as
genetic testing of an unborn baby, or how human activities
influence climate change and the future of the earth. These
real-world examples help make connections between the students
lives and the course content, while simultaneously building
students critical thinking, analysis, and evaluation skills.
Interactive lecturing When I lecture in class, it happens for at
most 10 minutes at a time, and even then it rarely involves me
talking straight to the class without interruption. I routinely
pose questions to my students in an interactive manner, whereby I
am aiming to stimulate their interest in the topic and force them
to come up with answers to questions before moving on. In this way
my lecturing becomes more of a group conversation or discussion
with my students. These blocks of lecturing are broken up with 5 -
7 active learning activities during a typical class session.
Technology I am well skilled in using many forms of technology in
the classroom to provide an effective and engaging learning
experience. I use PowerPoint slides to display lecture material
(text, images, and videos), and I also play videos from youtube.com
(or other websites) to enhance certain topics, especially those
involved biological processes. I provide links to these videos,
media stories, or other helpful websites in the PowerPoint slides
or as posts on Blackboard. During my Spring 2012 Biology 100 course
I used Mastering Biology, an online homework and tutorial system,
to assign homework, lab exercises, and some exams. Mastering
Biology allowed my students to gain extra instruction on the course
materials through animations, videos, and interactive exercises,
all of which are incorporated into their homework assignments. I
created a cumulative final exam in Mastering Biology which included
pictures, videos, and links to other websites which gave my
students an interactive exam experience that is not possible with a
traditional paper exam. Additionally, I used Poll Everywhere to
receive feedback from my students in real-time during class. Poll
Everywhere allows students to answer multiple-choice or open-ended
questions by texting with their cell phones, going to a website, or
by tweeting. Formative in-class assessment I do my best to ensure
that my students are learning during class and that they are not
confused or lost at any point. To do this, I use formative in-class
assessment methods to check my students understanding in realtime,
which allows me to spend more time on a confusing topic before
moving forward in the lesson. As described above, Poll Everywhere
is a fantastic tool for these types of assessments, especially for
larger classes. I use multiple Poll Everywhere questions during
class sessions that serve as checkpoints in the lesson. Before
moving on to the next part of the lesson, I can see what percentage
of the class correctly answers a question about an important point
or topic. If a substantial proportion of the class answers
incorrectly, then I will go back and discuss the topic in a
different way, then I will re-pose the question to the class to
check for improved understanding. Additionally,
I may have my students talk to each other to try to convince
each other what answer is correct, then have them answer the
question again. I also use one-minute papers at the end of a class
to ask my students what they are most confused about or what the
most important topic from the day was, and then I use their
feedback to address conceptual misunderstandings. If needed, I will
then begin the next class session with a response to their comments
and feedback. Finally, I also strongly encourage students to ask
questions during class which provides yet another avenue for me to
collect information about what my students learn during class.
Course Materials Below is a description of some of the materials
and student assessment methods that I use during a course in order
to maximize student engagement and learning. Syllabus I intend to
make my course syllabi as detailed and complete as possible so as
to give my students a full sense of what they will learn in my
course, what is expected of them, and how my course is structured.
I include measurable course goals on the first page of my syllabi
which lets my students know up front what they will be able to do
at the end of my course. I revisit these course goals on the last
day of class to demonstrate to my students how much they have
learned during the semester. Please see Appendix B for a sample
syllabus from my Fall 2012 Biology 642 course. Lesson plans I
construct lesson plans using backward design which guides me in the
delivery and presentation of each class lesson. The first thing I
do when designing a lesson is to determine what my learning
objectives are; that is, what my students will be able to do by the
end of the lesson. I use learning objectives that are measureable
and that address all levels of Blooms Taxonomy. Once I have my
learning objectives in place, I decide how they will be assessed
and how I will know whether they have been met or not. This can be
accomplished through the use of a Poll Everywhere question, asking
questions of individuals in the class, or having students write or
draw on the board. Finally, I plan the actual layout or outline of
the class, in which I determine what content to include, when I
will lecture, and when I will use active learning techniques, all
while ensuring that my learning objectives are met. Please see
Appendix C for a sample lesson plan from my Spring 2012 Biology 100
course. Exams I use multiple exams during a course in order to
assess student learning. When writing exams, I first put together a
list of all of the learning objectives from the lessons that the
exam is covering. Then I tailor each exam question to specifically
address each of the learning objectives. Therefore, for a student
to do well on an exam, they need to be able to achieve each of the
learning objectives: in fact, this is exactly what I tell my
students how to prepare for the exams. In order to gauge the
difficulty of each exam, I assign a score of 1 6 to each question
based on Blooms Taxonomy, with 1 being the lowest level
(knowledge), and 6 being the highest (synthesis). I then take an
average score of all of the exam questions which allows me to
compare exams throughout a course. I have worked with a colleague
to score exams and I am confident that I am assigning proper Blooms
scores to my exam questions. Please see Appendix D for a sample
exam from my Spring 2012 Biology 100 course. Worksheets In addition
to providing my students with lecture slides and in-class handouts,
I also prepare supplementary worksheets for them to use at their
discretion.
These worksheets are not graded and do not have to be handed in,
but I encourage my students to use the worksheets for extra help. I
either provide the worksheets after a lesson that I know will be
difficult, or I will create them in response to student demand. For
instance, in my Spring 2012 Biology 100 course, my students were
having difficulties determining the polarity of molecules. I
therefore created a worksheet that explained in more detail how to
determine a molecules polarity, as well as providing several
examples for them to try out. See Appendix E for a copy of this
worksheet. Projects For upper-division courses with lower
enrollments, I use semester-long projects to challenge students to
apply the course material in real-life situations. For example, in
my Fall 2012 Designer Proteins and Society course, students were
required to develop a design proposal outlining the steps required
to clone, express, purify, and functionally assess a recombinant
protein of their choice. Students completed assignments throughout
the semester which allowed me to give them feedback on their design
process. The project culminated in a written design proposal and an
oral presentation to the class. Evidence of Student Learning I
engage my students as much as possible during a class session by
being an enthusiastic teaching and by using a variety of teaching
methods and strategies, but engagement is fruitless if it does not
result in learning. In order to assess student learning, I use
several assessment strategies, from in-class formative assessments,
homework assignments and exams, pre-tests and post-tests, and
student feedback. These strategies provide evidence for what my
students are learning and allows me to alter my teaching to address
student weaknesses and strengths. Performance across the semester
As the semester progresses, I use a variety of both formative and
summative assessments to gauge what my students are learning. I
routinely use in-class formative assessment tools such as Poll
Everywhere questions, group brainstorm activities, and questioning
to check my students understanding in real-time. These assessments
let me change my teaching on the fly and linger on a topic if
students are having difficulty understanding a concept. I also
track my students learning through summative assessments such as
homework assignments and exams. I assign daily homework assignments
to force my students to stay up to date and to give them many
opportunities to earn points towards their final grade. I
administer multiple in-class examinations that directly assess the
learning objectives in the course, and through the semester I can
track class performance. In my Spring 2012 Biology 100 course, I
administered five in class exams plus a cumulative online final
exam, and the averages on these exams were 53%, 60%, 75%, 77%, 73%,
and 61%, respectively. I believe that an improvement in my students
study habits were partly due to the increase in exam scores,
because many of them reported poor study habits as a primary cause
of their low Exam 1 grade on a post-exam reflection worksheet. I
would attribute the low average on the cumulative final exam to two
causes: (1) the exam was more difficult than the in-class exams
(average Blooms score of 2.5 vs. 2.1); and (2) since it was an
open-notes, open-book exam, I think that my students did not take
the exam seriously and did not study as well as they should have. A
sample exam is provided in Appendix D.
Pre- and post-test data I use a pre-test and post-test to assess
what my students know coming into my class and also to see what
they learned by the end of the class. Giving my students a pre-test
on the first day of class allows me to establish a baseline and
lets me adjust my expectations accordingly. As the semester
progresses, my teaching naturally covers the topics that are on the
pre-test without explicitly addressing the pre-test questions.
Finally, I use a post-test (which is identical to the pre-test) to
assess what my students learned, how well I taught my students
during the semester, and to help plan my future courses. During my
Spring 2012 Biology 100 course, I administered a 16 question
multiple choice pre-test on the first day of class, and the same
test on the day of their final exam. My students performed
significantly better on the post-test compared the pre-test, with 9
of the 16 questions showing significant improvement (P < 0.05).
Overall, 49 students (out of 71) answered all 16 questions on both
the pre-test and post-test, and the average learning gain was 0.23
0.21. Please see Appendix F for a copy of this pre-test / post-test
and a data summary. Student feedback My students regularly give me
feedback on how I am doing as a teacher, and how much they are
learning. I encourage students to stop me during class and ask
questions if they do not understand something. When students stay
after class to ask questions, I usually ask them how they thought
the preceding class session was and if there were any topics that
did not make sense. I take this one step further when students
visit my office by asking them in more depth how they are enjoying
my class, if they are having any troubles with any of the concepts,
and if there is anything I can do to help them learn more
effectively. I also collect student feedback from a course
evaluation at the five-week point in the semester that helps me to
address potential problems while there is still a large portion of
the semester remaining. Teaching Evaluation In order to become a
better teacher, evaluations from my students and faculty colleagues
are essential. Self-reflection is also critical so that I can
implement these evaluations in my teaching. Student Evaluations I
have my students provide feedback on the course and on myself as a
teacher after 5-weeks and again at the end of the semester. I use
the feedback that I collect from the 5-week evaluations to respond
to student concerns and to improve the remainder of the course.
While I was evaluated very positively by my Spring 2012 Biology 100
students at the 5-week mark (average 9.0/10.0 rating), I used their
feedback to improve my teaching for the remainder of the course,
including slowing the pace of my lectures, adding more engagement
and activities, and helping them build a strong biological
vocabulary. I also feel that this shows my students that I truly
care about how they are doing and how the course is proceeding. I
also use end-of-course evaluations to reflect on my performance
during the semester as a whole and also to improve my teaching for
future courses. These data provide evidence (in addition to student
performance on summative assessment items) that I use to assess the
success of a course. I received very high marks on my student
evaluations for my Spring 2012 Biology 100 course, and a sample of
these ratings are shown below in Table 1. Please see Appendix G for
sample student comments as well as end-of-course evaluations from
my Spring 2012 Biology 100 course and Fall 2012 Biology 642
course.
Statement This course was excellent. The organization of this
course was excellent. This instructor was an effective teacher.
Mean STD (1.0 to 5.0) 4.65 0.57 4.79 0.47 4.81 0.45
Table 1: Summary of overall course ratings from Biology 100,
Spring 2012. A higher mean response indicates higher level of
agreement, as Strongly Disagree equaled the value of 1 and Strongly
Agree equaled the value of 5. Number of students enrolled = 71;
number of responses = 43. Peer Evaluations Equally important to
student evaluations are faculty or colleague evaluations, and I
like to have a departmental colleague observe my class at least one
time per semester (I had three colleague evaluations during my
Spring 2012 Biology 100 course) so as to gain important feedback
that I can use to improve my teaching and my courses. See Appendix
H for evaluations from two colleagues that I received during my
Spring 2012 Biology 100 course and one from my Fall 2012 Biology
642 course. Self-reflection I am constantly self-evaluating and
reflecting on my teaching experiences. After each class session, I
write in my teaching journal about what worked, what didnt work,
and any other comments about the preceding class session. This not
only helps me improve the content of class sessions for the next
time I teach them, but it also helps me think about how I responded
to student questions, how I presented certain course material, and
how I responded to classroom disruptions. Efforts to Improve
Teaching I am actively involved in several ways to improve my
teaching and my courses so that my students can be more engaged and
effectively learn the course material. I have attended the 2011
IRACDA Annual Meeting in Houston, TX in June 2011 that focused on
ways to improve student learning in biology classrooms, as well as
the 2012 Association for Biology Laboratory Education Conference in
Chapel Hill, NC in June 2012. I also attended the Bridging the Gap
NC Conference in Raleigh, NC in October 2012 where I presented a
poster on a novel case study I developed that explores the
development of recombinant human insulin, the worlds first
bioengineered drug. As a SPIRE Postdoctoral Fellow, I have been
trained in effective pedagogy, active learning techniques, and
course design through several workshops including an 8-week seminar
on college teaching. I have also participated in several workshops
hosted by the UNC Center for Faculty Excellence, and a
semester-long course on college science teaching taught by faculty
in the UNC Biology department. Responding to and evaluating student
feedback is an effective way to improve my teaching. I use feedback
received from students in class, from comments after class or from
emails, and from mid-term and end-of-course evaluations to reflect
on and improve my teaching. I also use feedback and critiques from
colleague and faculty observations to improve my teaching. In order
to stay up to date on effective teaching practices, innovations in
pedagogy, and happenings in the higher education community, I
follow and read several scholarly journals on teaching, including
The Journal of College Science Teaching, CBE: Life Sciences
Educations, The Journal of Chemical Education, and Biochemistry
and Molecular Biology Education. I also routinely check The
Chronicle of Higher Education website for news and updates about
higher education. Educational Outreach I believe I have a
responsibility as a scientist to give back to my community and
educate and inspire the public about scientific issues. I
especially like to talk with middle school and high school students
(i.e. the next generation of scientists and engineers). When I was
in high school, I dont remember ever having a single visit from a
scientist, engineer, or any other professional for that matter. I
want students in my community to be exposed to scientists and
engineers before they go to college so that they can possibly be
inspired to study bioengineering, microbiology, biochemistry, or
any other type of science. Ive had extensive experience leading,
planning, and executing educational outreach visits to community
middle and high schools since I have graduated college, and I
intend to continue this extremely important and rewarding activity
throughout my career. In the future, I want to impart my devotion
to community outreach to my students by including a
service-learning component in my classrooms wherein my students
will visit community high schools and give presentations on
scientific issues. Future Goals My major and most important
short-term goal is to obtain a faculty position at a university
where I can excel in teaching and mentoring undergraduate students.
I thoroughly enjoy being a part of the academic culture, and I feel
that I can significantly impact many students in the classroom. In
this future role, I would like to teach introductory science
courses for majors and non-majors students, coordinate and teach
laboratory courses, develop and teach upper division courses in
biotechnology and recombinant protein design, establish an lead a
community educational outreach program, and serve as an advisor and
mentor to undergraduate students. I also have several goals for
improving my teaching and adding new components to my courses.
First, I believe that case studies are extremely useful tools that
engage students and promote student learning, and I have a goal to
develop my own case studies for teaching science courses. I have
developed and implemented a case study that explores the history of
the development of recombinant human insulin, the worlds first
bioengineered drug. I have also submitted this case study to be
added to the National Center for Case Study Teaching in Science
collection. Second, I have a goal of incorporating my passion for
educational outreach into my courses. I would like to include a
service learning component into a future upper division
biotechnology course, where my students would prepare presentations
on the many facets of the biotechnology industry and give these
presentations to local high schools in order to promote interest in
the STEM fields and also to dispel misconceptions about
biotechnology. Finally, I aim to incorporate an educational
research component into my career. I am interested in how to
effectively teach large classes, how to properly motivate students
in non-majors introductory science classes, and developing concept
inventories for biotechnology courses.
Appendix A
Teaching Experience Courses Taught Biology 101 Principles of
Biology Spring 2013 Department of Biology University of North
Carolina at Chapel Hill Enrollment: 400 undergraduate students
Introduction to biology for mixed-majors students exploring the
major concepts in biology including macromolecules, cell structure
and function, genetics and inheritance, evolution, diversity, and
ecology Mentored and supervised four graduate teaching assistants
and four undergraduate supplemental instructors Biology 642
Designer Proteins and Society Fall 2012 Department of Biology North
Carolina A&T State University Enrollment: 16 undergraduate and
graduate students A self-developed novel course that explores the
recombinant protein design and production processes and their link
to medicine, pharmaceuticals, industry, and agriculture Implemented
a 5-week laboratory module based on the Bio-rad Biotechnology
Explorer Protein Expression and Purification series where students
expressed, purified, and assessed recombinant dihydrofolate
reductase Biology 100 Biological Sciences Spring 2012 Department of
Biology North Carolina A&T State University Enrollment: 71
undergraduate students Introduction to biology for non-major
students Supervised three graduate student TAs for three laboratory
sections MCP 290 / NPB 198 Major Discoveries in Muscle Contraction
Fall 2009 Department of Neurobiology, Physiology, and Behavior
University of California, Davis Enrollment: 11 graduate students, 1
undergraduate student Self-developed novel seminar exploring the
major scientific advances in muscle physiology research over the
past 50 years Guest Lectures Biology 472 Comparative Physiology
Spring 2011 Department of Biology University of North Carolina at
Chapel Hill Enrollment: ~70 undergraduate students Presented two
original guest lectures on the topics of 1) invertebrate excretion;
and 2) animal movement and muscle physiology
Appendix A
Biology 4610 The Physics of Life Fall 2010 Department of Biology
North Carolina Central University Enrollment: 10 undergraduate
students Presented original guest lecture on muscle mechanics and
motor proteins Teaching Assistant Experience BIS 2C Introduction to
Biology: Biodiversity and the Tree of Life Winter 2010 College of
Biological Sciences University of California, Davis Enrollment: 24
undergraduate students Assisted students on weekly in-lab
assignments and answered student questions Bioengineering 481
Senior Capstone Project Fundamentals Spring 2007 Department of
Bioengineering University of Washington, Seattle Enrollment: ~60
undergraduate students Advised students on research and design
projects Taught three original lectures on good notebook practices,
how to find funding sources, and how to write a research paper
Appendix B
NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIVERSITY
Course SyllabusCourse Information Course Number & Section
Course Title Term Location Days & Times Website Biology 642
Section 001 (CRN 17632) Designer Proteins and Society Fall 2012 224
Barnes Hall Tuesday & Thursday 12:30pm - 1:45pm
http://blackboard.ncat.edu
Professor Contact Information Professor Dr. Justin Shaffer Email
Address [email protected] Office Phone 724-301-2712 Office Location
G10 Barnes Hall Office Hours Tuesday 10:00am 12:00pm Thursday
2:00pm 4:00pm Course Description and Goals Proteins can be so much
more than what you find in a burger or a nutritional supplement!
Did you know that scientists and engineers can design and produce
custom proteins to meet specific functional and technical needs?
Whether they are for medical, pharmaceutical, industrial,
agricultural, or environmental settings, recombinant proteins are
used in a variety of ways to benefit society. This course provides
an introduction to the fascinating and diverse field of recombinant
proteins. Once we cover the basics of how recombinant proteins are
made, youll learn how to use recombinant DNA technology to design
protein expression vectors. Next, youll learn how various
expression systems (bacterial, insect, and animal cells) and
purification schemes (chromatography, centrifugation, dialysis,
etc) are used to produce and purify recombinant proteins. Youll
also have the opportunity to perform a realistic laboratory
research project to express, purify, and functionally assess a
recombinant protein. Throughout the course well discuss the many
ways that recombinant proteins are used in modern day medicine,
industry, and agriculture, and will discuss their societal and
ethical impacts. Specifically, at the end of this course, you will
be able to Define and explain key fundamental terms and concepts of
protein biochemistry Apply molecular biology methods and
recombinant DNA technology to create recombinant protein expression
vectors Design an expression and purification scheme for a
recombinant protein based on the proteins biochemical properties
Develop a design proposal to clone, express, purify, and assess a
recombinant protein Explain how recombinant proteins are used in
medical, pharmaceutical, industrial, environmental, and
agricultural applications and why they are so important to society
Explain and evaluate the ethical implications surrounding
recombinant DNA technology and the use of recombinant proteins
Design, execute, and troubleshoot laboratory experiments and
methods relating to recombinant protein expression and
purification
Appendix BPage 2 More specific learning objectives and goals are
presented for each unit as described in the course schedule below,
and will also be provided at the beginning of each day of class.
Prerequisites Molecular biology (BIOL 401). If you do not meet the
prerequisites please contact me. Required Textbooks and Materials
There are no required textbooks for this course. You might want to
consult your biology, molecular biology, or biochemistry textbooks
from time to time to help brush up on some material. Reading
materials will be posted on Blackboard for you to read and print
out. Course Requirements and Evaluation Active Learning: You might
be used to taking courses in which the professor simply lectures
the entire class period. This course is going to be very different,
as it is going to be an active classroom. By active I mean that you
will be required to interact with myself and your fellow students
to learn the material presented in this course. We will be using
activities such as small group work, case studies, and class
discussions to actively engage in the learning process. In order to
have an active classroom, attendance is extremely important. By
attending class and working through these active learning exercises
you will develop critical thinking and problem solving skills that
are essential to performing well in this course and others.
Recombinant Protein of the Day: Recombinant proteins are essential
to medicine, industry, agriculture, and the environment. To
highlight the importance of recombinant proteins in our society,
each day of class will feature a Recombinant Protein of the Day.
During these short, 5 minute presentations, we will learn about the
function of the recombinant protein, how it is used by society, and
how it is produced. I will give the first handful of presentations,
but then you as a class will be responsible for presenting the
remainder. The goal is not to learn everything possible about the
specific recombinant protein, but rather to be exposed to the many,
many ways that recombinant proteins positively affect our society!
See the handout for more details. Design Project: The overall goal
of this course is that you will be able to design and map out a
procedure to clone, express, purify, and functionally assess a
recombinant protein. This project will be in the form of a written
proposal. The proposal will include the following sections: 1)
background on the biological importance of the protein you want to
produce; 2) design of the cloning process (choice of vector, primer
design, choice of restriction enzymes, etc); 3) choice of the
expression system; 4) design of a purification scheme (type of
chromatography, etc); and 5) design of experiments to assess the
function of the protein. All sections will require justifications
as to why you designed the process the way you did. Throughout the
semester, there will be checkpoints where you will have to turn in
parts of the project to keep you on track. The final project will
be due at the end of the semester. Further instructions and
guidelines for the project will be given out in class. Laboratory
Project: During the last few weeks of this course you will have the
chance to take part in a realistic research project where you will
express, purify, and functionally assess a recombinant protein,
dihydrofolate reductase (DHFR), an important enzyme involved in the
synthesis of nucleic acid precursors. We will be using the Bio-rad
Biotechnology Explorer Protein Expression and Purification series
of modules that will give you the opportunity to grow E. coli
bacteria to express DHFR, to purify DHFR using affinity
chromatography, and to assess the enzymatic activity of DHFR using
a spectrophotometric assay. Assessments of the lab portion of the
class will include pre-lab assignments, in-class worksheets, and a
written lab report. Further instructions and guidelines will be
given out in class.
Appendix BPage 3 Guest Speakers and Field Trip: In this course
you will be exposed to a variety of techniques and principles that
are used in the biotechnology sector. To give you more insight into
this type of industry, we will be having a guest speaker in class
from a local biotechnology company to share their experiences in
working with recombinant proteins in industry. We will also be
taking a field trip to a local biotechnology company to see the
production of recombinant proteins on a large scale. Further
details will be announced in class. Evaluation: There will be
multiple grading opportunities in this course, giving you many
chances to do well. A summary of the various grading opportunities
is given below. Pre-Test: The pre-test will cover basic DNA and
protein concepts that you need to know to do well in this course.
The pre-test is worth 50 points, or 5% of your course grade.
Recombinant Protein of the Day: You are required to give a 5 minute
presentation describing the recombinant protein of your choice. The
due date is variable, as you will sign up for a specific date to
present. This presentation is worth 50 points, or 5% of your course
grade. Quizzes: Throughout the semester, we will have brief,
unannounced in-class quizzes that will assess your knowledge of the
course material. If you miss a quiz, you will not be able to make
it up. Quizzes are worth 50 points, or 5% of your course grade.
Homework Assignments: There will be four homework assignments that
will help you stay up to date on the course material. Homework
assignments will be due at the beginning of class on the day they
are due. Homework due dates are listed in the detailed course
schedule below. Homework assignments are worth 100 points, or 10%
of your course grade. Exams: There will be two take-home exams in
this course, with each worth 10% of your course grade. The first
exam will be due on September 25th and will cover material from
Units 1 and 2. The second exam will be due on October 23rd and will
cover material from Unit 3. Laboratory Project: There will be
several components of the lab project, including pre-lab
assignments, in-class worksheets, and a final written report (due
December 5th at 5pm). All of these activities will add up to 250
points, or 25% of your course grade. More details about the
laboratory project will be handed out in class. Design Project:
There will be several due dates throughout the semester where you
will have to turn in updates on your design project. The project
will culminate in oral presentations held during the final exam
period (Friday December 7 from 1 3pm). All of the components of the
design project will add up to 300 points, or 30% of your course
grade. More details about the design project will be handed out in
class. The breakdown for course points is as follows: Pre-Test
Protein of the Day Quizzes Homework Exams Laboratory Project Design
Project Total 5% 5% 5% 10% 20% 25% 30% 100% 50 points 50 points 50
points 100 points 200 points 250 points 300 points 1000 points (see
handout for details) (4 at 25 points each) (2 at 100 points each)
(see handout for details) (see handout for details)
Appendix BPage 4 Based on the above point structure, you can
calculate your grade at any time during the semester (ask for help
if you need it), and you should calculate your grade regularly to
keep track of how you are doing in the course. The number of points
will be converted to letter grades based on the following: 895 1000
points 795 894 points 695 794 points 595 694 points Less than 595
points A B C D F
Course Policies Courtesy to Fellow Students: We are going to
have a positive learning environment in this class, so courtesy to
your fellow students (and to me!) is imperative. Do you want to be
distracted while trying to learn? Probably not, so please treat
your classmates as you want to be treated. This includes putting
your cell phones on silent before class starts, not using cell
phones during class, limiting side conversations and comings and
goings during class, not reading newspapers or doing the crossword
puzzles, and other possible distractions. Attendance: Attendance is
vital to succeeding in this course. Participation in the active
learning activities during class will help you develop your
critical thinking and problem solving skills which will help you on
the exams in this course and in other courses. Finally, attendance
is required by North Carolina A&T State University, and failure
to attend class regularly will result in a reduction of your grade
and possible failure of the course. Academic Integrity: Enrollment
in this class means that you agree to abide by the expectations of
North Carolina A&T State University regarding academic
integrity. For specific information, refer to your Student
Handbook. Also, refer to the most current Undergraduate Bulletin
for the academic dishonesty policy. The Universitys Academic Honor
Code will be strictly enforced. Your responsibilities in the area
of honor include, but are not limited to, avoidance of cheating,
plagiarism and improper or illegal use of technology. Your
assignments are expected to be your own work. If you have
questions, please ask. Integrity is an important characteristic
that should be exemplified in the lives of all North Carolina A
& T State University students. Dishonesty will not be tolerated
in any form in this class. Any student caught cheating on an
examination or any other class assignment will be given a grade of
zero for that examination or class activity and reported to
University officials for further disciplinary actions. Plagiarism
(i.e. citing information written by another person without
referencing the persons work) will also lead to a grade of zero for
the assignment. Changing a few words in material taken from a book
or the internet without referencing the author of the material is
still plagiarism. Late Work: No late work will be accepted. All
assignments are due at the beginning of class on the day that they
are due. Please plan accordingly to make sure your homeworks and
other assignments are turned in on time. Make-up Work: If you have
an official university excuse for missing an exam (death in the
family, sickness, university activity), then a make-up exam will be
possible. Please see me ahead of time if you know you will miss an
exam due date. Quizzes cannot be made up. Field Trips: We will be
going on a field trip in this course. See the university policy on
field trips and class travel. More details will be announced in
class.
Appendix BPage 5 Course Schedule The following is the schedule
for the course. The course is broken up into four units, with the
first three units being classroom-based, and the last unit being a
hands-on laboratory project. Due dates for homework (HW), exams,
design project (DP), and pre-lab (Pre) assignments are listed when
appropriate. See design project and laboratory project hand-outs
for more details on these assignments. The schedule is subject to
change. Unit 1: Introduction to Recombinant Proteins BIG QUESTION:
What is a recombinant protein? At the end of this unit you will be
able to Evaluate the use of recombinant DNA technology to make
recombinant proteins Outline the major steps in the design and
production of a recombinant protein Use online tools and databases
to research and create recombinant proteins Thursday August 16
Tuesday August 21 Thursday August 23 Tuesday August 28 Course
introduction and overview Insulin: the first recombinant drug How
to make a recombinant protein Online tools for protein design Unit
2: Recombinant DNA Technology BIG QUESTION: How do you use
recombinant DNA technology to make proteins? At the end of this
unit you will be able to Outline the steps necessary to prepare a
functional expression vector Identify and describe the essential
features of cloning and expression vectors Design PCR primers to
clone a gene of interest Explain how restriction enzymes are used
to clone genes Explain how to screen for positive recombinant
clones Thursday August 30 Tuesday September 4 Thursday September 6
Tuesday September 11 Thursday September 13 Tuesday September 18
Overview and RNA and cDNA preparation Polymerase chain reaction
& primer design Plasmids and Expression vectors DNA
manipulation (restriction enzymes & ligation) Transformation
and screening of recombinants Verification of vector contents &
DNA sequencing HW 1 DP 1 HW 2
Pre-test due
Unit 3: Recombinant Protein Expression and Purification BIG
QUESTION: How do you produce and purify a recombinant protein? At
the end of this unit you will be able to Compare and contrast
recombinant protein expression systems Describe protein
purification methods and technologies Evaluate purification methods
for a given protein given its properties Describe methods used to
assess protein purity Explain how to quantify and assess
recombinant protein activity/function Thursday September 20 Tuesday
September 25 Thursday September 27 Expression systems Cell culture
growth, induction, and expression Crude purification methods Exam
1
Appendix BPage 6 Tuesday October 2 Thursday October 4 Tuesday
October 9 Thursday October 11 Tuesday October 16 Thursday October
18 Tuesday October 23 Chromatography I Chromatography II Fall Break
no class Assessment of protein purity and yield Assessment of
protein function Scale-up of protein production schemes Guest
lecture X-ray crystallography Unit 4: Laboratory Project BIG
QUESTION: How do you express, purify, and functionally assess DHFR?
At the end of this unit you will be able to Grow, induce, and
handle E.coli bacteria using sterile techniques Express and purify
DHFR from E.coli using affinity chromatography Assess the purity
and function of DHFR using SDS-PAGE and enzymatic assays Collect
and analyze data in a realistic research project Thursday October
25 Tuesday October 30 Thursday November 1 Tuesday November 6
Thursday November 8 Tuesday November 13 Thursday November 15
Tuesday November 20 Thursday November 22 Tuesday November 27
Thursday November 29 Introduction to project & basic lab
techniques Lyse cells Crude purification of DHFR Affinity
purification of DHFR Desalting and SDS-PAGE Concentration
measurement of DHFR Enzymatic assay of DHFR activity Data analysis
Thanksgiving break no class Guest speaker Course summary and
evaluations Pre 1 Pre 2 Pre 3 Pre 4 DP 3, Pre 5 Pre 6 Pre 7 HW 3 DP
2 HW 4 Exam 2
DP 4 DP 5
Final lab report due December 5 at 5pm Final exam period: Friday
December 7 from 1 3pm
Appendix CBiology 100, Lecture 17 DNA Profiling Learning
Objectives: Explain how PCR is used to amplify DNA molecules
Predict the size of a DNA molecule using gel electrophoresis Define
STR analysis and explain how it is used in DNA profiling Use DNA
profiling results to match a suspect to a crime scene Reading:
Chapter 12 (sections 12.11 12.15) Class Outline: Discuss Exam 3 and
study tips Last time we talked about cloning, today were going to
talk about another example of DNA biotechnology, and next week were
going to talk about GMOs Describe Earl Washingtons case 5 minutes
Interweave Earls story with rest of lecture, ending with how he got
pardoned Did the criminal justice system work? Is there a better
way to prove someones guilt or innocence? What other forms of
evidence are used in court? Think-pair-share Eye-witness testimony,
biological samples, video evidence DNA profiling overview Show
figure from book, explain each step Go through each step in more
detail Can also be used in paternity tests OJ Simpson, Bill
Clinton, Thomas Jefferson 10 minutes 3.22.12 Spring 2012
10 minutes
1. DNA is isolated 5 minutes DNA can be taken from several
biological samples Where is DNA found? in the nuclei of cells
Blood, semen, bone, tissue, lip print on a glass or cigarette,
saliva, hair o Only white blood cells have nuclei (mature red blood
cells lose their nucleus because they dont divide) Blood typing
used to be used, but there are only a few blood types What if you
dont have enough sample? o Make more DNA with PCR 2. DNA of
selected markers is amplified 15 minutes How do you tell if your
DNA is different from someone elses? You could compare your entire
genomes, but that would take a while Instead, compare only select
regions of DNA that are known to differ between individuals You
need lots of DNA to do this
Appendix CBiology 100, Lecture 17 DNA Profiling 3.22.12 Spring
2012
You usually dont have much DNA at a crime scene to work with
Using PCR you can get lots of DNA, starting with as few as 20
cells! Show figure for how PCR works Show youtube video for how PCR
works What regions are getting amplified? o Talk about what regions
are used as markers later STR analysis
3. DNA is compared 15 minutes Now you have all of this DNA and
you need to know more about it Gel electrophoresis lets you see the
size of DNA molecules Show book figures for how it works If you
wanted to compare the STR regions between two (or more) people,
this would be the way to go PE question about DNA size o Show gel
with bands and a ladder how big is band A? o Also ask is band B
larger than band A? or vice versa STR analysis 15 minutes Define
STRs and give example for what they are Ask class (TPS) to come up
with a method for how STRs can be used to compare peoples DNA o The
answer is the method of DNA profiling Show 13 STR regions and CODIS
Show how STR analysis works by comparing STR lengths from a suspect
to a crime scene (book figure 12.14A) Show figure 12.11 and ask
which suspect could have committed the crime? Odds of two people
having the same 13 STR regions is 1 in a billion (or greater) Case
wrap-up 5 minutes Earl was innocent, but was wrongfully imprisoned
for 17 years DNA profiling is a powerful tool to determine
innocence or guilt Since 1989, 218 convicts have been released
after being proven innocent using DNA profiling
Appendix DBiology 100 Section 002 Spring 2012 Name:
_________________________________ Please answer the following
questions by clearly circling your answer. There are 33 questions
worth 3 points each, for 100 points total (you get one free point
for showing up). There is one extra credit question at the end that
is worth 5 points, making it possible to score 105 out of 100
points on this exam. Please ask questions if you dont understand a
question and good luck! 1. What is the central dogma of molecular
biology? A. RNA makes protein makes DNA B. DNA makes RNA makes
protein C. Protein makes RNA makes DNA 2. In dogs, short hair is
dominant (H), whereas long hair is recessive (h). What phenotype
does a hh dog have? A. Long hair B. Short hair C.
Intermediate-length hair 3. What is the most important type of gene
regulation in eukaryotes? A. DNA unpacking B. Transcriptional
control C. RNA splicing 4. What is the DNA complement of this DNA
sequence? ATCACCGGATGC A. CGTAGGCCACTA B. TAGTGGCCTACG C.
UAGUGGCCUACG 5. The DNA in skin cells contains genes for which of
the following? A. Skin color B. Hair color C. Both skin color and
hair color 6. If two animals are heterozygous for a single gene and
have 100 offspring, approximately how many of the offspring will
exhibit the dominant phenotype? A. 75 B. 50 C. 25 7. TPOX is one of
the STRs that are used to compare DNA between different people. Why
is TPOX useful for comparing DNA between different people? A. TPOX
varies in the number of repeats between people B. TPOX varies in
sequence between people C. TPOX is only present in some peoples
genomes 8. If you inherit two identical copies of a gene from your
parents, you are said to be ____________ for that gene. A.
Recombinant B. Heterozygous C. Homozygous 9. What is the main
difference between DNA and RNA? A. RNA is longer than DNA B. DNA
uses the base T, whereas RNA uses the base U C. DNA uses the base
U, whereas RNA uses the base T Exam 3 3.29.12
Appendix DName: ___________________
Use the figure to the right for the next three questions. Each
band in the ladder is in 100 base increments, starting with 100
bases at the bottom and going to 700 bases at the top. 10. Of the
four DNA molecules shown (A, B, C, and D), which is the longest? A.
Molecule A B. Molecule B C. Molecule C D. Molecule D 11.
Approximately how many bases are in DNA molecule C? A. 480 bases B.
520 bases C. 600 bases 12. If DNA molecules A and D are STRs from
two different people, what can you say about them? A. STR A is
longer than STR D B. The sequence of STR A is different than the
sequence of STR D C. STR A is shorter than the STR D 13. What is
the name of the method that is used to make billions of copies of
DNA? A. CODIS B. STR C. PCR 14. Imagine John Horner was successful
in creating a male chickensaurus by turning on and off genes in
somatic cells during the development of a chicken embryo. If this
male chickensaurus mated with a normal female chicken, what kind of
offspring would they have? A. A chickensaurus B. A normal chicken
C. Part chicken, part chickensaurus 15. What is the transcription
product of this sequence? GCTAGCGATGAC A. CGAUCGCUACUG B.
CAGTAGCGATCG C. CGATCGCTACTG 16. A mutation in DNA changes a codon
from ACU to ACG. What happens to the amino acid this codon codes
for? A. The amino acid stays the same B. It changes from one amino
to another C. The amino acid is deleted 17. What is the first step
towards turning a gene on through transcriptional control? A. RNA
polymerase binds the promoter B. Transcription factors bind the
promoter C. Activators bind enhancers 18. Why do DNA molecules move
from the top (negatively charged) to the bottom (positively
charged) in gel electrophoresis? A. Because DNA is negatively
charged B. Because DNA is neutrally charged C. Because DNA is
positively charged
Appendix DName: ___________________ Use the figure to the right
for the next two questions. Each band in the ladder is in 100 base
increments, starting with 100 bases at the bottom and going to 700
bases at the top. CS crime scene; S1 suspect 1; S2 suspect 2; S3
suspect 3 19. Based on the results in the figure to the right, what
suspect likely committed the crime? A. Suspect 1 B. Suspect 2 C.
Suspect 3 D. You dont have enough information to know 20. What is
this method that you used in the previous question called? A. PCR
B. STR analysis C. Translation 21. What is the translation product
of this sequence? AUGGCAUGCGAUUGC A. Met Ala Trp Asp Stop B. Met
Ala Cys Asp Cys C. TACCGTACGCTAACG 22. What is the difference
between a dominant and a recessive allele? A. Dominant alleles are
more common in the human population than recessive alleles B.
Dominant alleles are always found in homozygous pairs, whereas
recessive alleles are always found in heterozygous pairs C. Only
one copy of a dominant allele is needed to show its trait, whereas
two recessive copies are needed to show its trait 23. What is the
molecular basis for genotype and phenotype? A. Genotype is the DNA,
and phenotype is the proteins B. Genotype is the RNA, and phenotype
is the proteins C. Genotype is the proteins, and phenotype is the
DNA 24. The contractile protein myosin is abundant in a muscle
cell. Is the gene for myosin turned on in this muscle cell? A. Yes,
because the myosin protein is present B. Yes, because the myosin
gene is turned on in every cell in the body C. No, because
silencers are prohibiting transcription from taking place 25. There
is a mutation in a promoter that does not allow RNA polymerase to
bind correctly. Will transcription take place? A. Yes, because DNA
polymerase and not RNA polymerase is needed for transcription B.
No, because the transcription factor / activator complex cant bind
the promoter C. No, because if the RNA polymerase cant bind
correctly then RNA cant be made 26. A genetic counselor tells you
and your partner that you have a 50% chance of having a baby with a
recessive disease. If the dominant allele for this disease is D,
and the recessive allele is d, what are your and your partners
genotypes? A. One is DD and one is dd B. One is Dd and one is Dd C.
One is Dd and one is dd 27. What is the definition of a gene? A. A
polymer of amino acids B. A trait or characteristic such as eye
color C. A discrete unit of hereditary information (DNA)
Appendix DName: ___________________ 28. Being able to taste PTC
is dominant (T), whereas not being able to taste PTC is recessive
(t). If your dad is heterozygous and can taste PTC, and your mom
cannot taste PTC, what is the chance that you can taste PTC? A. 75%
B. 50% C. 25% 29. In labs, black fur is dominant (B), whereas
chocolate fur is recessive (b). A black lab (BB) is bred with a
chocolate lab (bb). What is the chance that they have a chocolate
lab puppy? A. 100% B. 50% C. 0% 30. What method was used to make
dinosaurs in Jurassic Park? A. Cloning B. Gene transfer C.
Manipulation of hox genes 31. Different cells in your body make
different proteins. Why dont they all make the same proteins? A.
Because different cells have different genes B. Because gene
expression is regulated C. Because not every cell has a supply of
amino acids 32. What type of DNA mutation causes hemoglobin
proteins to become mutated in people with sickle cell anemia? A.
Substitution B. Insertion C. Deletion 33. A man has a DNA
replication error causing a deletion of DNA in a reproductive cell
about to enter meiosis. A womans skin cell acquires a substitution
mutation during replication prior to mitosis due to the suns
radiation. If these two individuals mate, which of the mutations
might be passed onto their children? A. The mans deletion mutation
B. The womans substitution mutation C. Both mutations are possibly
inherited Extra credit: Using your knowledge of the central dogma,
determine the end product starting from the DNA sequence below. If
you use the one-letter abbreviation of each monomer in the final
product, you will spell out a secret message! Make sure to write
out all steps in the process and to show your work!
TTA ACG CGA TGA TAT TCG GCC CGG CTA
Appendix EPolarity worksheet Dr. Justin Shaffer Biology 100
Spring 2012
This worksheet will help you learn how to distinguish between
polar and non-polar molecules, and whether a molecule is
hydrophilic (water loving) or hydrophobic (water fearing). Read
through the first two pages, then try out the examples on the last
page. How do you tell if a bond is polar or non-polar? Covalent
bonds form between atoms when atoms share electrons The bonds
between carbon (C) and hydrogen (H) in methane are covalent, as are
the bonds between oxygen (O) and hydrogen (H) in water
The polarity of a covalent bond depends on the electronegativity
of an atom. Electronegativity refers to how strongly an atoms pulls
electrons towards itself. Atoms have different electronegativities.
For the major atoms that make up biomolecules, the strength of
electronegativities is shown below (from most electronegative to
least electronegative) Oxygen (O) > Nitrogen (N) > Carbon (C)
~ Hydrogen
Oxygen is the most electronegative, followed by nitrogen,
followed by carbon and hydrogen, which have about the same
electronegativity When two atoms with the same electronegativity
form a covalent bond, neither atom pulls electrons closer to
itself. There is an equal distribution of electrons (everything is
balanced), and this kind of bond is referred to as a non-polar
covalent bond. o The bonds between carbon and hydrogen in methane
are non-polar covalent bonds because carbon and hydrogen have the
same electronegativities.
If two atoms with different electronegativities form a covalent
bond, then electrons are pulled closer to the atom that is more
electronegative. This results
Appendix E
in that atom becoming more negatively charged, and the other
atom becoming more positively charged. There is an unequal
distribution of electrons, and this kind of bond is referred to as
a polar covalent bond. o The bonds between oxygen and hydrogen in
water are polar covalent bonds because oxygen is more
electronegative than hydrogen, so it pulls the electrons closer to
itself, making the oxygen slightly negative and the hydrogen atoms
slightly positive.
How do you tell if a molecule is polar or non-polar? If a
molecule (or part of a molecule, like the R group of an amino acid)
contains only non-polar covalent bonds, then the molecule is
non-polar. o QUICK TIP: If a molecule (or part of the molecule)
only contains carbon (C) and hydrogen (H) atoms then the molecule
is always non-polar. If a molecule (or part of a molecule, like the
R group of an amino acid) contains one or more polar covalent
bonds, then the molecule is most likely polar. o QUICK TIP: If a
molecule (or part of the molecule) contains oxygen (O) or nitrogen
(N) atoms bound to carbon (C) or hydrogen (H) atoms, then it is
most likely polar. o EXCEPTION: Carbon dioxide (CO2) is non-polar
because it is a linear molecule (a straight line). This is a
special case. In the examples above, methane is a non-polar
molecule because it contains only non-polar covalent bonds between
carbon and hydrogen atoms. Water is a polar molecule because it
contains polar covalent bonds between the oxygen and hydrogen atoms
(remember the QUICK TIPS to help you figure this out!) How do you
tell if a molecule is hydrophobic or hydrophilic? Hydrophobic
molecules are water fearing. That is, they dont mix well with water
and would rather interact with other hydrophobic molecules.
Hydrophobic molecules can be identified if they contain mostly
non-polar covalent bonds. Lipids and amino acids with only carbon
and hydrogen R groups are hydrophobic molecules. Hydrophilic
molecules are water loving. That is, they mix very well with water.
Hydrophilic molecules can be identified if they contain polar
covalent bonds. Carbohydrates, amino acids that contain polar R
groups (hydroxyl, carboxyl, and amino groups), and positively or
negatively charged molecules are hydrophilic molecules.
Appendix E
Practice set: Try applying the information you just learned to
the following examples. In each molecule, identify what bonds are
polar or non-polar, and then determine if the entire molecule is
polar or non-polar.
For this set of macromolecules, identify which are hydrophilic
and which are hydrophobic, and say why. For the amino acids, only
evaluate the R groups (highlighted in the pink boxes).
Appendix F
Pre- and Post-test data from Biology 100, Spring 2012, NC
A&T State University This test was given on the first day of
class without prior notification. The same test was also given on
the day of the final exam, also without prior notification. All of
the questions (except two) are from the AAAS Project 2061 Science
Assessment Website (http://assessment.aaas.org/), which provides
validated questions that tests misconceptions students have about a
variety of science topics. Question 8 was taken from Impey et al, J
Coll Sci Teaching, 40: 31-37, 2011, and Question 14 was of my own
design. The actual test can be found on the next two pages. A
summary of the performance of my Spring 2012 Biology 100 class is
shown below.
Figure F1: Summary data for pre-test and post-test for Spring
2012 Biology 100. The bars represent the percentage of students who
responded correctly. Asterisks indicate a significant improvement
on the post-test compared to the pre-test (P < 0.05). Between 61
and 66 responses were recorded for each question. Further
statistical analysis was performed on the pre-test and post-test
data. The learning gain was calculated for each student that
answered all 16 questions on both the pre-test and the post-test (n
= 49). The average learning gain for the class was 0.23 0.21, or a
23% improvement from the pre-test to the post-test. The Wilcoxon
SignedRank test was performed to determine if the improvements on
the post-test as a whole were significant. The P value was 5.0 x
10-7, suggesting that the improvements on the post-test as a whole
were significant. The Wilcoxon Signed-Rank test was also used to
determine whether there was significant improvement on individual
questions. There were significantly more correct answers to 9
questions on the post-test compared to the pre-test (P < 0.05,
see Figure F1). The reason for limited improvement or decline on
the other 7 questions is not immediately apparent, as I felt that I
covered those topics equally well during the semester. This data
set will be extremely useful in planning further courses as it will
allow me to improve my teaching in specific areas.
Appendix FThis is a pre-test that will help me understand what
you know coming into this course. Please answer all questions. This
does not count toward your grade. Please dont write on this test.1.
Which of the following represents the correct order from smallest
to largest? The smallest should be listed first. A. An atom, a DNA
molecule, a cell B. An atom, a cell, a DNA molecule C. A cell, an
atom, a DNA molecule D. A cell, a DNA molecule, an atom 2. What is
TRUE about cells? A. All living things are made up of many cells,
and all cells are the same size and shape. B. All living things are
made up of many cells, but not all cells are the same size and
shape. C. All cells are the same size and shape, but not all living
things are made up of many cells. D. Not all cells are the same
size and shape, and not all living things are made up of many
cells. 3. Which of the following statements is TRUE? A. DNA is made
up of proteins C. DNA is made up of amino acids B. Proteins are
made up of DNA D. Proteins are made up of amino acids
4. What does the information in genes provide instructions for?
A. Assembling protein molecules B. Assembling chromosomes into DNA
C. Rearranging DNA into protein molecules D. Rearranging DNA into
traits 5. The DNA molecules in skin cells contain information about
which of the following? A. Eye color and skin color B. Eye color,
but not skin color C. Skin color, but not eye color D. Neither eye
color nor skin color 6. Which of the following is TRUE about genes?
A. Genes are traits. C. Genes are sequences of nucleotides. B.
Genes are proteins. D. Genes are sequences of amino acids.
7. A change commonly referred to as a mutation occurs to a DNA
molecule in an organism's skin cell before the organism reproduces.
When the organism reproduces, how many of its children will have
the mutation? A. All of the organism's children will have the
mutation. B. Some of the organism's children will have the
mutation. C. None of the organism's children will have the
mutation. D. It will depend on how much time passes between when
the mutation occurs and when the organism has children. 8. A doctor
tells a couple that they have a one in four chance of having a
child with an inherited illness. Which of the following is true? A.
If they have only three children, none will have the illness B. If
their first child has the illness, the next three will not. C. Each
of the couples children will have the same risk of suffering the
illness. D. If the first three children are healthy, the fourth
will have the illness. 9. Which of the following statements is TRUE
about the carbon dioxide that is used by plants? A. It is combined
with oxygen to make sugar molecules. B. It is absorbed through the
roots of plants. C. It comes from the air. D. It is food for
plants. 10. Where does the food that a plant needs come from? A.
The food comes in from the soil through the plants roots. B. The
food comes in from the air through the plants leaves. C. The plant
makes its food from carbon dioxide and water. D. The plant makes
its food from minerals and water. 11. Milk contains water,
carbohydrates, proteins, minerals, and fat. Is milk food for
people? A. No, because liquids cannot be food, and milk is a liquid
B. No, because for something to be food it must provide both energy
and building materials, and milk does not provide energy C. Yes,
because for something to be food it must provide energy, and the
minerals in milk provide energy D. Yes, because food is a source of
energy and building materials, and milk provides energy and
building materials
Appendix F
12. According to the theory of natural selection, what would
happen to a species of lizards when a new predator is introduced
into the environment where the lizards live? A. The lizards that
already have the physical traits needed to avoid the new predator
would be more likely to survive and reproduce, and the ones that do
not would be less likely to survive and reproduce. B. All of the
lizards would try to develop new physical traits to avoid the new
predator. C. Some of the lizards would try to develop new physical
traits to avoid the new predator, and the other lizards would die.
D. Because all lizards of the same species have the same physical
traits, one lizard would not have an advantage over another lizard.
They would either all survive or all die. 13. Which of the
following statements is TRUE about the evolution of plants and
animals? A. All plants and all animals share a common ancestor with
each other. B. All plants share a common ancestor, but all animals
do not share a common ancestor. C. All animals share a common
ancestor, but all plants do not share a common ancestor. D. No
plants share a common ancestor with each other, no animals share a
common ancestor with each other, and no plants share a common
ancestor with any animals. 14. How do antibiotics work? A. They
kill viruses B. They kill bacteria C. They kill viruses and
bacteria D. They kill something else 15. A student is interested in
the behavior of fish. He has 4 fish bowls and 20 goldfish. He puts
8 fish in the first bowl, 6 fish in the second bowl, 4 fish in the
third bowl and 2 fish in the fourth bowl. He places each fish bowl
under light, he keeps the temperature at 75F for all 4 bowls, and
he observes the behavior of the fish.
What can the student find out from doing just this experiment?
A. If the number of fish in the fish bowl affects the behavior of
the fish. B. If the temperature of the fish bowl affects the
behavior of the fish. C. If the temperature of the fish bowl and
the amount of light affect the behavior of the fish. D. If the
number of fish, the temperature, and the amount of light affect the
behavior of the fish.
16. A farmer wants to find out which type of soil is best for
growing his corn. He also wants to find out which type of
fertilizer is best for growing his corn. He does the following
experiment using two different types of soil and two different
types of fertilizer:
What can the farmer conclude from this experiment? A. He can
conclude that Soil B is the best soil for growing his corn. B. He
can conclude that Fertilizer Y is the best fertilizer for growing
his corn. C. He can conclude that Soil B is the best soil for
growing his corn and that Fertilizer Y is the best fertilizer for
growing his corn. D. It is NOT possible to conclude from this
experiment which soil is best for growing his corn or which
fertilizer is best for growing his corn.
Appendix G
Spring 2012 Course Evaluation Results Shaffer BIO 100Information
about the Students 1. What is your year in school?First Year
Sophomore Junior Senior Grad Student PostBacc Missing TotalCount 23
15 5 0 0 0 0 43 % 53.5% 34.9% 11.6% 0.0% 0.0% 0.0% 0.0% 100.0%
2. What is your gender?Male Female Missing TotalCount 19 24 0 43
% 44.2% 55.8% 0.0% 100.0%
3. Race Are youCount American Indian Asian Black or
African-American Hispanic or Latino Native Hawaiian or Other
Pacific Islander White Multiracial Missing Total0 1 36 0 0 3 0 3
43
%0.0% 2.3% 83.7% 0.0% 0.0% 7.0% 0.0% 7.0% 100.0%
4. How many semesters of biological science course work have you
had prior to enrolling in this course?Count None One Two Three Four
or more Missing Total21 12 5 4 1 0 43
%48.8% 27.9% 11.6% 9.3% 2.3% 0.0% 100.0%
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
1 of 6
Appendix G
5. Which best describes you?Count I am a science major. I am a
non-science major. I am currently undecided on my major.6 33 4
%14.0% 76.7% 9.3%
Course Ratings 6. Instructora. The instructor was organized and
presented material in a logical order. b. The instructor presented
material clearly. c. The instructor clearly communicated the goals
and objectives of the course. d. The instructor showed enthusiasm
for the subject matter. e. The instructor developed a good rapport
with the students. f. The instructor was available to students
outside of class. g. The instructor provided helpful feedback. h.
The instructor varied class activities over the course of the
semester. i. The instructors lectures were at an appropriate level
for me. j. The instructor taught in a manner that served my needs
as a student. k. The instructor used technology appropriately for
the course material and course objectives. l. The instructor
evaluated my work and performance fairly in this class. m. The
instructor made connections to current topics in science research
throughout the semester. Strongly Disagree0.0% 0.0% 0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Disagree0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
0.0% 0.0%
Neutral0.0% 0.0% 0.0% 0.0% 2.3% 0.0% 0.0% 4.7% 2.3% 2.3% 0.0%
0.0% 0.0%
Agree20.9% 16.3% 11.6% 11.6% 18.6% 16.3% 18.6% 27.9% 23.3% 23.3%
20.9% 18.6% 16.3%
Strongly Agree79.1% 83.7% 88.4% 88.4% 79.1% 83.7% 81.4% 67.4%
74.4% 74.4% 79.1% 81.4% 83.7%
Mean STD4.79 .41 4.84 .37 4.88 .32 4.88 .32 4.77 .48 4.84 .37
4.81 .39 4.63 .58 4.72 .50 4.72 .50 4.79 .41 4.81 .39 4.84 .37
A higher mean response indicates higher level of agreement, as
Strongly Disagree equaled the value of 1 and Strongly Agree equaled
the value of 5.
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
2 of 6
Appendix G
7. Course Formata. The textbook used was current and
comprehensible. b. Lectures were delivered in a clear and
interesting manner. c. Lecture material was relevant to the course
objectives. d. In-class activities (e.g., labs and discussions)
were interesting, relevant and helped me understand the concepts
better. e. Out-of-class activities (e.g., group projects and
assignments) were interesting, relevant and helped me understand
the concepts better. f. Writing assignments were interesting and
helped me understand concepts better. g. Instructional technologies
and media used in this course contributed to me learning the
concepts. h. Exams were clearly written and fair.
Strongly Disagree0.0% 0.0% 0.0% 0.0%
Disagree0.0% 0.0% 0.0% 0.0%
Neutral17.9% 2.3% 0.0% 4.7%
Agree30.8% 23.3% 25.0% 30.2%
Strongly Agree51.3% 74.4% 75.0% 65.1%
Mean STD4.33 .77 4.72 .50 4.75 .44 4.60 .58
2.4%
0.0%
14.3%
45.2%
38.1%
4.17 .85
0.0% 0.0% 0.0%
2.6% 0.0% 0.0%
23.1% 9.5% 4.7%
25.6% 38.1% 37.2%
48.7% 52.4% 58.1%
4.21 .89 4.43 .67 4.53 .59
A higher mean response indicates higher level of agreement, as
Strongly Disagree equaled the value of 1 and Strongly Agree equaled
the value of 5.
Course Ratings cont 8. Student Expectationsa. This course taught
me what I wanted to know about the subject matter. b. This course
challenged me to think critically and in new ways about the subject
matter. c. Taking this course has motivated me to pursue a career
in the sciences. d. Taking this course has motivated me to pursue
additional courses in this field. e. This course helped motivate me
to attend graduate/professional school after I complete my
undergraduate degree. Strongly Disagree0.0% 2.3% 20.9% 25.6%
9.3%
Disagree2.3% 0.0% 23.3% 14.0% 2.3%
Neutral11.6% 0.0% 16.3% 23.3% 27.9%
Agree44.2% 44.2% 14.0% 11.6% 23.3%
Strongly Agree41.9% 53.5% 25.6% 25.6% 37.2%
Mean STD4.26 .76 4.47 .74 3.00 1.51 2.98 1.54 3.77 1.25
A higher mean response indicates higher level of agreement, as
Strongly Disagree equaled the value of 1 and Strongly Agree equaled
the value of 5.
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
3 of 6
Appendix G
9. Overall Overall, considering content, design, and structure,
this course was excellent. Overall, considering the syllabus and
objectives, the organization of this course was excellent. Overall,
considering course content and objectives, this instructor was an
effective teacher.
Strongly Disagree0.0% 0.0%
Disagree0.0% 0.0%
Neutral4.7% 2.3%
Agree25.6% 16.3%
Strongly Agree69.8% 81.4%
Mean STD4.65 .57 4.79 .47
0.0%
0.0%
2.3%
14.0%
83.7%
4.81 .45
A higher mean response indicates higher level of agreement, as
Strongly Disagree equaled the value of 1 and Strongly Agree equaled
the value of 5.
Open-Ended Comments (Alphabetized and edited for student
anonymity)10. Describe ways this course was different from other
science courses you have taken at this university.
Because this teacher took the time with me even through science
isn't my strong subject. Dr. Shaffer was very enthusiastic about
the course. Everything was very organized from the lecturers to the
homework assignments. From what I hear about other biology
professors Dr. Shaffer actually cares about us passing his class.
He actually helped the students and explained the information. He
did a lot of discussion on different subjects, whereas my other
classes didn't. He used a lot of real life experiments when
discussing main topics and lectures. He was always available to
help and was fantastic teacher. He was more engaging than my last
bio/chemistry professor. He worked with the students more than my
other science teacher. I thought it was good. I actually enjoyed
this class I usually hate all my science classes. I actually
learned something and he wanted to see me successful. I felt like
was in part of the class, and that made me learn better. I have
never taken a science class at the university, but taking this
class was beneficial, my professor was understanding and willing to
help at any time. I have never taken science courses in college. I
have not took any other science courses. I was actually interacted
in learning bio. The teacher was helpful. It was actually
interesting. Science is normally boring but he made it fun. It was
more hands on than my other classes. It also was more interesting.
It was more personal he connected with us and you could tell he
cared about you as a student It was very interactive and very hands
on. It was well explained It was, actually to learn in a fun and
enthusiastic way that kept me tagged along. Mr. Schaffer covered
information that we can use in our daily lives. Teacher actually
cared about everybody being successful in the class. This course
actually challenged me to think and study. This course should not
change at all. This course was easy and beneficial, Enjoyed it.
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
4 of 6
Appendix G
This course was different from other science courses because we
did pull everywhere and a little bit of hands on activities. This
course was more in detail about the things he wanted us to learn.
This is the first science course I've taken.
11. What aspects of this course were most valuable?
After the 1st test, study guides were helpful. All because all
can be valuable in its own way. Dr. Shaffer always had slides that
related to worldly things we could relate to. Dr. Shaffers
patience. Everything Everything Everything Everything, learned a
lot. I loved how the teacher was so willing to put everything aside
to make sure everyone got the lesson. I think that the lectures
wee. Learning about the body. Learning about things that I never
knew. Lecturing was great, which in turn really help me grasp
different concepts. Most valuable to me was, being able to do the
honors contracts. Study guides, powerpoints The bond he had with
us. The dialogue. The in class lectures because he gave great
information. The instructor The involvement and interaction with
students during lecture and lab. The lecture on diabetes. The
lectures in the course they were outlined as well as gone over in
class. The lectures of this course were most valuable. The
lectures, like the powerpoints. I enjoyed them the most. The
lectures. The power points lectures. The powerpoint lectures. The
real life lectures where Dr. Shaffer appealed to his lectures and
made sure students understood the material. The subjects that
related to real life. The way he teaches and explained things. When
we had a real life situation.
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
5 of 6
Appendix G
12. What suggestions do you have for how the instructor can
improve the teaching of this course?
Aside from being a great teacher already, the only thing I would
add is maybe more group activities outside of class. Be a little
more engaging. Continue to be happy about teaching, superb job,
thank you. Dr. Shaffer is a great professor. For labs less group
work. He did a good job at teaching this course. He did well for a
first year teacher. He is perfectly fine right now. He listens to
students suggestions and put it in good use. Honestly, nothing. Dr.
Shaffer did a wonderful job. I could actually tell that he cared
about us and if we were learning anything, best Bio teacher I ever
had. I don't think he needs to improve on anything. He is a great
teacher and enjoys teaching biology. I think he should do actual
lessons and not so much lectures. I think Prof. Shaffer is an
outstanding biology teacher. I really don't think he should change
anything about the way he teacher because he is able to relate
science to people and things in everyday life. Just keep doing what
you are doing. Just to offer make up exams, some circumstances are
unpredictable, especially because they count so much towards grade.
Keep doing a great job, you are an awesome teacher. Keep doing what
he been doing, he's a great instructor. Keep doing what he's doing.
Keep doing what you're doing! Keep up the good work, you are going
to be an outstanding professor. Keep up the good work. Make class a
little more interactive to keep the class attention. Mr. Shaffer
had done a wonderful job with the subject and relating with the
students. None at all, just keep up the good work. None he's a
great teacher. None that I can think of. None, he did a very good
job. None. Did a great job. Nothing, he done great to me. Sometimes
the wording on the test can be a little tricky and need
explanation, that's the only thing some questions are wither very
broad or need complete explanation. The instructor did a great job
teaching this class. I would not advise him to change anything. The
labs need to be every week from the first week to the last week and
actually test formatted study guides would help. To keep doing what
he is doing.
SPIRE Descriptive Data Tables for Spring 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted May 24,
2012)
6 of 6
Appendix G
Fall 2012 Course Evaluation Results Shaffer BIO 642 Special
TopicsInformation about the Students 1. What is your year in
school?Count %
First Year Sophomore Junior Senior Grad Student PostBacc Missing
Total
0 0 2 9 2 0 0 13
0.0% 0.0% 15.4% 69.2% 15.4% 0.0% 0.0% 100.0%
2. What is your gender?Count %
Male Female Missing Total
3 10 0 13
23.1% 76.9% 0.0% 100.0%
3. Race Are youCount American Indian Asian Black or
African-American Hispanic or Latino Native Hawaiian or Other
Pacific Islander White Multiracial Missing Total 0 0 13 0 0 0 0 0
13 % 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0%
4. How many semesters of biological science course work have you
had prior to enrolling in this course?None One Two Three Four or
more Missing Total Count 0 0 0 1 12 0 13 % 0.0% 0.0% 0.0% 7.7%
92.3% 0.0% 100.0%
SPIRE Descriptive Data Tables for Fall 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted December
9, 2012)
1 of 5
Appendix G
5. Which best describes you?I am a science major. I am a
non-science major. I am currently undecided on my major. Count 13 0
0 % 100.0% 0.0% 0.0%
Course Ratings 6. Instructora. The instructor was organized and
presented material in a logical order. b. The instructor presented
material clearly. c. The instructor clearly communicated the goals
and objectives of the course. d. The instructor showed enthusiasm
for the subject matter. e. The instructor developed a good rapport
with the students. f. The instructor was available to students
outside of class. g. The instructor provided helpful feedback. h.
The instructor varied class activities over the course of the
semester. i. The instructors lectures were at an appropriate level
for me. j. The instructor taught in a manner that served my needs
as a student. k. The instructor used technology appropriately for
the course material and course objectives. l. The instructor
evaluated my work and performance fairly in this class. m. The
instructor made connections to current topics in science research
throughout the semester. Strongly Disagree 0.0% 0.0% 0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Disagree 0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 7.7% 0.0% 0.0% 0.0% 0.0% 0.0% Neutral 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Agree 15.4%
15.4% 15.4% 0.0% 0.0% 7.7% 7.7% 0.0% 7.7% 7.7% 0.0% 7.7% 0.0%
Strongly Agree 84.6% 84.6% 84.6% 100.0% 100.0% 92.3% 92.3% 92.3%
92.3% 92.3% 100.0% 92.3% 100.0% Mean STD 4.85 .38 4.85 .38 4.85 .38
5.00 0.00 5.00 0.00 4.92 .277 4.92 .28 4.77 .83 4.92 .28 4.92 .28
5.00 0.00 4.92 .28 5.00 0.00
A higher mean response indicates higher level of agreement, as
Strongly Disagree equaled the value of 1 and Strongly Agree equaled
the value of 5.
SPIRE Descriptive Data Tables for Fall 2012 Course Evaluation
Forms Prepared by Strategic Evaluations, Inc. (Submitted December
9, 2012)
2 of 5
Appendix G
7. Course Formata. The textbook used was current and
comprehensible. b. Lectures were delivered in a clear and
interesting manner. c. Lecture material was relevant to the course
objectives. d. In-class activities (e.g., labs and discussions)
were interesting, relevant and helped me understand the concepts
better. e. Out-of-class activities (e.g., group projects and
assignments) were interesting, relevant and helped me understand
the concepts better. f. Writing assignments were interesting and
helped me understand concepts better. g. Instructional technologies
and media used in this course contributed to me learning the
concepts. h. Exams were clearly written and fair.
Strongly Disagree 0.0%
Disagree 0.0%
Neutral 7.7%
Agree 0.0%
Strongly Agree 0.0%
N/A 92.3%
Mean STD 3.00 N/A
0.0