# Stage 1, mathematics, Year B – Unit 39

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

In this unit, 'Objects can be sorted and classified in different ways', students are provided opportunities to:

• recognise that flat surfaces of 3D objects can be named as 2D shapes
• use mathematical vocabulary to name, describe and compare the features of 2D shapes and 3D objects
• deconstruct and construct prisms and cubes
• see how 3D objects can look different depending on the point of view as it is manipulated
• make and use a calibrated measuring device to measure and compare internal volume
• measure and compare volume of various 3D objects.

### Syllabus focus and content groups

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

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

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

• Use counting sequences of ones and tens flexibly
• Form, regroup and rename three-digit numbers

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

2D shapes: Recognise and classify shapes using obvious features

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

• 3D shapes: Recognise familiar three-dimensional objects
• 3D shapes: 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

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

• 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

## Syllabus

Syllabus outcomes and content descriptors from Mathematics K–10 Syllabus (2022) © NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales, 2024.

Category:

• Mathematics (2022)
• Representing whole numbers
• Stage 1
• Three-dimensional spatial structure
• Two-dimensional spatial structure
• Unit