86 Mathseeds Lesson sequence TEACH Content and skills PRACTISE Children will: APPLY Animated Lesson: Recognise shapes Introduce the rectangle. Identify rectangles. Define a rectangle. Differentiate rectangles from squares. Song: I’m a Rectangle understand that rectangles have 4 straight sides – 2 short and 2 long. Select rectangles amongst other shapes and in a setting. Worksheet 1 Shape recognition Draw: Dotty Shapes Reinforce correct formation of shapes. draw shapes using a set of dots as corners. Worksheet 2 Writing and drawing Find: Elephants, Beavers, Buses, Shape Monsters, Shape Colour Visual discrimination: identify a given shape. Identify the word rectangle. choose the given shape from amongst other shapes. Select the word rectangle from amongst other words. Worksheet 3 Sorting shapes Match: Colour a Pattern, Shape Sort, Stamping Shapes Identify shapes and colours in a pattern. Recognise shapes and their words. Count out shapes to match numerals. complete the pattern of colours and shapes. Match shapes to their words. Stamp a given number of shapes. Worksheet 4 Check Read: Book Read aloud book. listen, follow the reading and read along. Mathseeds book 15: Rectangles Learning objectives Children will: • identify rectangles. • recognise the word rectangle. • draw rectangles. Australian Curriculum Content Descriptions Measurement and Geometry Shape ACMMG009 sort, describe and name familiar two-dimensional shapes and three-dimensional objects in the environment Number and Algebra Number and place value ACMNA002 connect number names, numerals and quantities, including zero, initially up to 10 and then beyond Patterns and algebra ACMNA005 sort and classify familiar objects and explain the basis for these classifications; copy, continue and create patterns with objects and drawings Key vocabulary rectangle, straight, sides, 4, four, 2, two, long, short, shape, triangle, square, circle, colour, pattern, number, numerals 1–8, word, sort, match Extra assistance Rectangles and squares can easily be confused. The definition of a rectangle is 4 corners and 4 straight sides. Students need to be aware that a square is different to a rectangle because it has 4 equal sides. If the sides are not the same length it is a rectangle. Give them sorting activities using rectangles and squares to reinforce the difference. For advanced students you could introduce the concept that a square is a type of rectangle. Classroom activities What is it? Provide the students with a piece of paper that has a lot of dotted rectangles on it and the word rectangle in dotted writing at the top. They should trace over the word and the shape outlines with different coloured pencils or crayons. Then they can use each rectangle to draw an object that has a rectangular shape, eg a TV, a mobile phone, a book, a ruler, and so on. Make it! Give each student some playdough, plasticine or clay to make a rectangle. They could also collect natural items such as leaves and twigs to combine with their modelling material to make all the shapes they know – circle, square, triangle, rectangle. Lesson 15 • The rectangle