Mathematics – Stage 1 – Year B – Unit 25
New shapes can be made by joining (combining) or partitioning (breaking apart) existing shapes – developing student knowledge, skills and understanding of how new shapes can be formed from other shapes.
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:
- explore how shapes can be made by joining (combining) and breaking apart (partitioning) existing shapes
- create new shapes by adding or removing sides and vertices (corners)
- recognise how two-dimensional (2D) shapes can be classified into different categories according to their features
- create linear patterns with shapes that transform (slide and reflection)
- make designs with symmetry from reflection
- measure areas using uniform informal units
- recognise, sort, and describe the features of three-dimensional (3D) objects
- use concrete materials to model subdividing a whole length into both halves and quarters
- model sharing and grouping collections of objects to represent division.
Syllabus focus and content group
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
Combining and separating quantities A – MA1-WM-01, MA1-CSQ-01
- Recognise and recall number bonds up to ten
Forming groups A – MAO-WM-01, MA1-FG-01
- Represent and reason about additive strategies
- Use knowledge of equality to solve related problems
- Form multiples of ten when adding and subtracting two-digit numbers
Geometric measure A– MAO-WM-01, MA1-2DS-01, MA1-GM-01
- Length: Subdivide lengths to find halves and quarters
Two-dimensional spatial structure A– 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
Three-dimensional spatial structure A– MAO-WM-01, MA1-3DS-01
- 3D objects: Recognise familiar three-dimensional objects
- 3D objects: Sort and describe three-dimensional objects
Three-dimensional spatial structure B– MAO-WM-01, MA1-3DS-01
3D objects: Describe the features of three-dimensional objects