# Mathematics – Stage 1 – Year A – Unit 3

What needs to be measured determines the unit of measurement – this unit introduces students to measurement using uniform informal units.

Mathematics K-2 Syllabus © 2021 NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales.

In this unit students will learn to:

• compare, order and match using informal units of measure
• estimate whether a measurement is reasonable
• consider how the selection of measuring unit affects accuracy
• explore conservation of length, area, volume, and mass.

## Syllabus focus and content group

### Stage 1

##### Representing whole numbers A – 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
##### 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
##### Geometric measure A – MAO-WM-01, MA1-GM-02
• Length: Measure the lengths of objects using uniform informal units
• Length: Compare lengths using uniform informal units
##### Geometric measure B – MAO-WM-01, MA1-GM-02
• Length: Compare and order lengths, using appropriate uniform informal units
• Length: Compare lengths using uniform informal units
##### Two-dimensional spatial structure A– MAO-WM-01, MA1-2DS-01, MA1-2DS-02
• 2D shapes: Recognise and classify shapes using obvious features
• Area: Indirectly compare area
• Area: Measure areas using uniform informal units
##### Two-dimensional spatial structure B– MAO-WM-01, MA1-2DS-01, MA1-2DS-02
• Area: Compare rectangular areas using uniform square units of an appropriate size in rows and columns
##### Three-dimensional spatial structure A– MAO-WM-01, MA1-3DS-02
• Volume: Measure and compare the internal volumes (capacities) of containers by filling
• Volume: Measure the internal volume (capacity) of containers by packing
##### Three-dimensional spatial structure B– MAO-WM-01, MA1-3DS-02
• Volume: Compare containers based on internal volume (capacity) by filling and packing
##### Non-spatial measure A – MAO-WM-01, MA1-NSM-01
• Mass: Investigate mass using an equal-arm balance
##### Data A– MA1-WM-01, MA1-DATA-02
• Represent data with objects and drawings and describe the displays