# GM2-3: Sort objects by their spatial features, with justification.

This means students will sort objects by selecting an attribute or attributes by which to classify items and allocating the items into groups by commonality of that attribute. At Level Two students should be able to find their own system to classify items, using attributes like shape, colour, size, texture, thickness, material, purpose, etc and justify their allocation of items into categories, for example "all of these shapes have three sides". In doing so students should develop geometric language for attributes such as "side", "corner", "centre", "face", "edge", "curved", "straight", "larger", "smaller", etc.

construct two dimensional shapes using triangles

- Explain in their own language what line symmetry is.
- Describe the process of making shapes with line symmetry.
- Name common two-dimensional mathematical shapes.
- Describe the differences between common two-dimensional mathematical shapes in relation to number of sides.

describe features of two dimensional shapes

- Identify distinguishing features of 2D (plane) shapes using the language of sides and corners.
- Identify distinguishing features of 3D shapes using the language of faces, edges, vertex/vertices.
- Explore hexagons, recognising that they tessellate.
- Make hollow prism shapes and describe their300

identify basic attributes of two dimensional shapes.

identify attributes of two dimensional shapes

Devise and use Problem Solving Strategies to explore situations mathematically in particular guess and check, draw a picture, use equipment.

make shapes and patterns using two dimensional shapes.

- Sort attribute blocks and explain their groupings.
- Understand and use geometric language to describe the features of two-dimensional (plane) shapes.
- Create an artwork using plane shapes.
- Recognise how shape is an important feature of Picasso’s artworks.
- Understand and describe the300

find rectangles within a shape (Problem 1)

solve problems using additive strategies (Problem 2)

continue a spatial pattern (Problem 3)

make shapes on a geoboard.

- Students will be able to create models of several polygons and determine whether they are regular or irregular.
- Students will be able to use a geometric vocabulary when describing two-dimensional shapes.