# Mathematics – Multi-age – Year A – Unit 5

New shapes can be made by joining (combining) or partitioning (breaking apart) existing shapes – exploring two-dimensional shapes' attributes and features.

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:

• identify and describe two-dimensional (2D) shapes
• explore how shapes can be made by joining (combining) and breaking apart (partitioning) existing shapes
• classify shapes based on their attributes as that shape (features of triangles, circles, squares, rectangles, quadrilaterals, hexagons, octagons, polygons)
• manipulate shapes and objects to halve them in different ways. Sometimes, halves are made up of more than one part
• describe the position as about halfway, more than halfway or less than halfway
• create new shapes by adding or removing sides and vertices (corners)
• explore how 2D shapes can be classified into different categories according to their features
• turn shapes to fit into a space or create a design
• create linear patterns with shapes that transform (slide and reflections)
• make designs which have a line of symmetry.

### 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
##### Combining and separating quantities – MAO-WM-01, MAE-CSQ-01, MAE-CSQ-02
• Identify part-whole relationships in numbers up to 10
##### Forming groups – MAO-WM-01, MAE-FG-01, MAE-FG-02
• Copy, continue and create patterns
##### Geometric Measure– MAO-WM-01, MAE-GM-01, MAE-GM-02, MAE-GM-03
• Length: Use direct and indirect comparisons to decide which is longer
• Length: Create half a length
##### 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

### Stage 1

##### Representing whole numbers – MAO-WM-01, MA1-RWN-01, MA1-RWN-02
• Use counting sequences of ones with two-digit number
• Represent numbers on a line
##### Combining and separating quantities – MAO-WM-01, MA1-CSQ-01, MA1-CSQ-02
• Recognise and recall number bonds up to ten
##### Geometric Measure– MAO-WM-01, MA1-GM-01, MA1-GM-02, MA1-GM-03
• Length: Measure the lengths of objects using informal units
• Length: Subdivide lengths to find halves and quarters
##### Two-dimensional spatial structure – MAO-WM-01, MA1-2DS-01, MA1-2DS-02
• 2D shapes: Recognise and classify shapes using obvious features
• 2D shapes: Transform shapes with slides and reflections
• Area: Measure areas using uniform informal units
• 2D shapes: Represent, combine and separate two-dimensional shapes