For Keefer and all the other heros and heroines in his classroom. © 2011 Gordon Robert Hamilton. All rights reserved. For Educators: We learn best through hard fun. Earth Attack is a game where students attempt to attack an alien enemy formation before it can destroy one of our cities. Effective attacks take the least amount of time. The students who best protect a city become heros and heroines of the city. The game is more than just a set of revved-up worksheets... it inspires and motivates students to beat each other so that the learning takes place as a side-effect of an engaging competition. Earth Attack should be explained by splitting the class in two or three and having a competition. You can find free supporting materials on www.MathPickle.com in the grade 2 section. No grade 2 student is expected to get through the whole book. This overkill ensures that all students are kept engaged on a single curricular topic, with the intensity of the top students channeled into solving increasingly harder problems until the class is ready to move on to a new curricular topic together. Problem solving is at the heart of a quality mathematics education, so this is time well spent. Instead of allowing fast students to jump ahead and fragmenting the class, students are kept in a cohesive bunch. Earth Attack
For Keefer and all the other heros and heroines in his classroom. © 2011 Gordon Robert Hamilton. All rights reserved. For Educators: We learn best through.
Dec 18, 2015
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For Keefer and all the other heros and heroines in his classroom.
© 2011 Gordon Robert Hamilton. All rights reserved.
For Educators:
We learn best through hard fun. Earth Attack is a game where students attempt to attack an alien enemy formation before it can destroy one of our cities. Effective attacks take the least amount of time. The students who best protect a city become heros and heroines of the city.
The game is more than just a set of revved-up worksheets... it inspires and motivates students to beat each other so that the learning takes place as a side-effect of an engaging competition.
Earth Attack should be explained by splitting the class in two or three and having a competition. You can find free supporting materials on www.MathPickle.com in the grade 2 section. No grade 2 student is expected to get through the whole book. This overkill ensures that all students are kept engaged on a single curricular topic, with the intensity of the top students channeled into solving increasingly harder problems until the class is ready to move on to a new curricular topic together. Problem solving is at the heart of a quality mathematics education, so this is time well spent. Instead of allowing fast students to jump ahead and fragmenting the class, students are kept in a cohesive bunch.
Earth Attack
Everyone is competing to find the most effective way of shooting down enemy starships. To shoot one down, all its disk deflectors must be destroyed. You destroy these by hitting them with your ion cannon. No two disk deflectors may be targeted at the same time.
How to Play
This enemy starship has been destroyed in 8 seconds. It’s disk deflectors were targeted at 2, 3, 5, 7 and 8 seconds. The blueprint on the left shows how to add disk deflectors. For example the disk deflectors 2 and 3 both point into the disk deflector 5. That’s good because 2+3=5.
2
35
78
78
5
2
3
If any of these additions fail, the enemy escapes. This starship is destroyed because all the additions work (2+3=5 and 2+5=7 and 3+5=8.)
That looked easy, but groups of starships are more difficult to destroy.
1
34
57
2
57
912
We have failed to destroy the pair of starships above in 12 seconds because 5 and 7 are repeated... Remember the ion cannon can only hit one disk deflector at a time!
The same formation below was successfully destroyed in 14 seconds. There are no duplicate numbers and the disks add up (left starship: 2+6=8, 2+8=10, and 6+8=14… right starship: 1+3=4, 1+4=5, and 3+4=7.)
The person who destroys the enemy ships in the least time is a hero/heroine.
1
34
57
2
68
1014
4
A Vector Droid is attacking the United States. Can you save Houston in 8 seconds? Anything under 12 seconds is great! Target shooting practice above!
5
6
A pair of MiniMax Droids are attacking Australia. Can you save Sydney in 7 seconds? Anything under 10 seconds is good shooting!Target shooting practice above!
6
77
8
A Vector Droid and a MiniMax Droid are attacking Turkey. Can you save Istanbul in 10 seconds? Anything under 15 seconds is fantastic!Target shooting practice above!
9
10
A Shard Droid is attacking Russia. Can you save Moscow in 11 seconds? Anything under 15 seconds will be a cause for celebration!
11
12
Two Vector Droids are attacking China. Can you save Beijing in 15 seconds? Anything under 20 seconds is great!
13
14
A Raman Satellite is attacking Kenya. Can you save Nairobi in 7 seconds?
15
16
A Raman Satellite and MaxiMin Droid are attacking India. Can you save Delhi in 11 seconds?
17
18
Two Droid Gunships are attacking France. Can you save Paris in 14 seconds?
1919
20
A pair of Quad-Gun Droids are attacking Russia. Can you save Moscow in 19 seconds? How much better could you do if your first attack could happen at zero seconds?
21
22
A Euclid Class Starship is attacking Egypt. Can you save Alexandria in 43 seconds?
23
24
A Raman Satellite and Vector Droid are attacking Pakistan. Can you save Lahore in 15 seconds?
25
26
More attacks are in the book.Please support MathPickle.com by buying a copy of “Earth
Attack.”
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