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

Elaboration on this Achievement Objective

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.

Teaching resources for this Achievement Objective

This is a Level 2 Geometry activity from the Figure It Out Series. A PDF of the student activity is included.

construct two dimensional shapes using triangles

Figure It Out activities

Geometry and Measurement

Level Two

In this unit students explore line symmetry and the names and attributes of two-dimensional mathematical shapes. The context of this unit is students folding and cutting out shapes to make a series of mathematical shapes.

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.

Units of Work

Geometry and Measurement

Level Two

This interactive learning module supports students to think about features of shapes they see in the world around them, and how do describe them.

Use words that tell us about shapes. Identify features of two and three dimensional shapes. Find plane shapes in 3D objects. Explain why shapes are used for particular purposes.

Student e-Ako

Geometry and Measurement

Level Two

Activity One is a Geometry activity from the Figure It Out Series. A PDF of the student activity is included.

describe features of two dimensional shapes

Figure It Out activities

Geometry and Measurement

Level Two

In this unit students sort and explore two-dimensional and three-dimensional geometric shapes, identify and describe their distinguishing features and come to appreciate the efficiency of the tessellating hexagon in meeting the needs of honeybees.

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 their features....

Units of Work

Geometry and Measurement

Level Two

This is a Level 2 Geometry activity from the Figure It Out Series. A PDF of the student activity is included.

identify basic attributes of two dimensional shapes.

Figure It Out activities

Geometry and Measurement

Level Two

This unit provides you with a range of opportunities to assess the entry level of achievement of your students.

Classify whole numbers as even or odd and generalise the nature of sums when even and odd numbers are added. Recognise that sums remain the same if the same amount is added and subtracted to the two addends, e.g. 17 + 19 = 27 + 9. Create and follow instructions to make a model made with shapes....

Units of Work

Number and Algebra

Level Two

This is a Level 2 Geometry activity from the Figure It Out Series. A PDF of the student activity is included.

identify attributes of two dimensional shapes

Figure It Out activities

Geometry and Measurement

Level Two

The purpose of this activity is to engage students in identifying and sorting solids by the plane shapes of their faces.

Rich learning activities

Geometry and Measurement

Level Two

List a number of properties that distinguish the 3-dimensional solids of the problem. Devise and use Problem Solving Strategies to explore situations mathematically in particular guess and check, draw a picture, use equipment.

Problem solving activities

Geometry and Measurement

Level Two

make shapes and patterns using two dimensional shapes.

Figure It Out activities

Geometry and Measurement

Level Two

This unit uses the context of Picasso's art to explore two and three-dimensional shapes, to recognise their features, and to develop in the students appropriate language to discuss Picasso's and their own artworks.

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 the features of a cube...

Units of Work

Geometry and Measurement

Level Two

These are level 2 number, algebra, and geometry problems from the Figure It Out series. A PDF of the student activity is included.

find rectangles within a shape (Problem 1) solve problems using additive strategies (Problem 2) continue a spatial pattern (Problem 3)

Figure It Out activities

Geometry and Measurement

Level Two

make shapes on a geoboard.

Figure It Out activities

Geometry and Measurement

Level Two

This is an activity based on the picture book The Greedy Triangle

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.

Picture book activities

Geometry and Measurement

Level Two

The purpose of this activity is to engage students in solving a problem involving sorting polygons by their spatial features.

Rich learning activities

Geometry and Measurement

Level Two