# Mathematics – Multi-age – Year A – Unit 19

This two-week unit develops student knowledge, understanding and skills with two-dimensional (2D) shapes, three-dimensional (3D) objects and volume.

Mathematics K-2 Syllabus © 2022 NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales.

Students are provided opportunities to:

• classify 2D shapes and 3D objects in different ways according to their features
• recognise that flat surfaces of 3D objects can be named as 2D shapes
• understand that 3D objects are named according to their features
• see how 3D objects can look different depending on the perspective
• measure internal volume using uniform informal units
• compare and order internal volume based on size
• recognise that 3D objects can have the same name but be a different size and appearance
• compare 3D objects of a different appearance which have the same volume
• understand that volume is recorded by referring to the number and type of uniform informal units used.

## Syllabus focus and content group

### Early Stage 1

#### Representing whole numbers – MAO-WM-01, MAE-RWN-01, MAE-RWN-02

• Use the counting sequence of ones flexibly
• Recognise number patterns
• Connect counting and numerals to quantities

#### Two-dimensional spatial structure – MAO-WM-01, MAE-2DS-01, MAE-2DS-02

• Sort, describe and name familiar shapes
• Represent shapes

#### Three-dimensional spatial structure – MAO-WM-01, MAE-3DS-01, MAE-3DS-02

• Explore familiar three-dimensional objects
• Volume: Compare internal volume by filling and packing
• Volume: Compare volume by building

### Stage 1

#### Representing whole numbers – MAO-WM-01, MA1-RWN-01, MA1-RWN-02

• Use counting sequences of ones with two-digit numbers and beyond
• Continue and create number patterns
• Represent numbers on a line
• Represent the structure of groups of ten in whole numbers

#### Two-dimensional spatial structure – MAO-WM-01, MA1-2DS-01, MA1-2DS-02

• Recognise and classify shapes using obvious features

#### Three-dimensional spatial structure – MAO-WM-01, MA1-3DS-01, MA1-3DS-02

• 3D Objects: Recognise familiar three-dimensional objects
• 3D Objects: Sort and describe three-dimensional objects
• Volume: Measure and compare the internal volumes (capacities) of containers by filling
• Volume: Measure the internal volume (capacity) of containers by packing
• Volume: Construct volumes using cubes
• 3D Objects: Describe the features of three-dimensional objects
• Volume: Compare containers based on internal volume (capacity) by filling and packing
• Volume: Compare volumes using uniform informal units