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

This two-week unit develops student knowledge, understanding and skills with three-dimensional objects, volume and internal 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:

• name, classify, compare and describe 2D shapes and 3D objects according to their features
• recognise that flat surfaces of 3D objects can be named as 2D shapes
• see how 3D objects can look different depending on student point of view
• measure and compare internal volume using uniform informal units, with no gaps or spaces to measure volume
• measure and compare volume of various 3D objects.

## Syllabus focus and content group

### Early Stage 1

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

• Instantly name the number of objects within small collections
• 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

• 2D shapes: Sort, describe and name familiar shapes
• 2D shapes: Represent shapes

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

• 3D objects: 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

• Represent numbers on a line
• Represent the structure of groups of ten in whole number
• Use counting sequences of ones and tens flexibly
• Form, regroup, and rename three-digit numbers

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

• 2D shapes: 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