# Mathematics – Multi-age – Year A – Unit 3

What needs to be measured determines the unit of measurement– this unit introduces students to measurement using direct and indirect comparison.

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 direct comparison and informal units
• estimate whether a measure is reasonable
• consider how selection of measuring unit affects accuracy
• explore conservation of length, area, volume, and mass.

### 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
##### Geometric Measure– MAO-WM-01, MAE-GM-01
• Length: Use direct and indirect comparisons to decide which is longer
##### Two-dimensional spatial structure – MAO-WM-01, MAE-2DS-01
• 2D shapes: Sort, describe and name familiar shapes
• 2D shapes: Represent shapes
• Area: Identify and compare area
##### Three-dimensional spatial structure – MAO-WM-01, MAE-3DS-01
• 3D objects: Explore familiar three-dimensional objects
• Volume: Compare internal volume by filling and packing
• Volume: Compare volume by building
##### Non-spatial measure – MAO-WM-01, MAE-NSM-01
• Mass: Identify and compare mass using weight
##### Data– MAO-WM-01, MAE-DATA-01
• Organise objects into simple data displays and interpret the displays

### 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
• Use counting sequences of ones and tens flexibly
• Form, regroup and rename three-digit numbers
##### Forming groups– MAO-WM-01, MA1-FG-01
• Represent and explain multiplication as the combining of equal groups
##### Geometric Measure– MAO-WM-01, MA1-GM-02
• Length: Measure the lengths of objects using uniform informal units
• Length: Compare lengths using uniform informal units
• Length: Compare and order lengths, using appropriate uniform informal units
##### Two-dimensional spatial structure – MAO-WM-01, MA1-2DS-01
• 2D shapes: Recognise and classify shapes using obvious features
• Area: Measure areas using uniform informal units
• Area: Compare rectangular areas using uniform square units of an appropriate size in rows and columns
##### Three-dimensional spatial structure – MAO-WM-01, MA1-3DS-01
• Volume: Measure and compare the internal volumes (capacities) of containers by filling
• Volume: Measure the internal volume (capacity) of containers by packing
• Volume: Compare containers based on internal volume (capacity) by filling and packing
##### Non-spatial measure – MAO-WM-01, MA1-NSM-01
• Mass: Investigate mass using an equal arm-balance
##### Data– MAO-WM-01, MA1-DATA-01, MA1-DATA-02
• Represent data with objects and drawings and describe the displays