Year 1 - Maths
Explore, discuss and compare 2D shapes
Recognise, compose, decompose and manipulate 2D and 3D shapes
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Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will compose, copy, extend and develop repeating and radiating patterns. They will explore, discuss and compare 3D and 2D shapes.
Lesson Summary
You will learn to explore, discuss, compare and sort 2D shapes.
Key Notes
- Use everyday language to compare shapes e.g. wide, narrow, tall, short.
- Be able to count the sides and vertices of different 2D shapes.
- Understand how to sort shapes into two sets based on 'is' and 'is not' criteria.
- Be able to guess sorting rules by looking at how shapes have been sorted into two sets.
Vocabulary To Learn
- Sides: The straight edges around the outside of a 2D shape.
- Vertices: The corners of a 2D or 3D shape, where two or more edges or sides meet.
- Rectangle: A 2D shape with 4 straight sides and 4 vertices.
- Triangle: A 2D shape with 3 straight sides and 3 vertices.
Common Mistakes To Avoid
- Children may not recognise a 2D shape when it is presented in a different orientation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Use everyday language to compare shapes e.g. wide, narrow, tall, short. Be able to count the sides and vertices of different 2D shapes.
2. Use this key word in a maths sentence and explain it clearly. 'Sides'
The straight edges around the outside of a 2D shape. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children may not recognise a 2D shape when it is presented in a different orientation. Correction: Allow children to handle cut-outs of 2D shapes so they can rotate them and explore how the shapes look in different orientations.
More Lessons In This Unit
- Compose tangram images Study Guide
- Composing pattern block images Study Guide
- Copy, extend and describe repeating patterns Study Guide
- Examine ways that cubes can be composed into different arrangements Study Guide
- Explore and recognise 2D shapes Study Guide
- Explore, discuss and identify shapes that are and are not circles Study Guide
- Explore, discuss and identify shapes that are and are not rectangles Study Guide
- Explore, discuss and identify shapes that are and are not triangles Study Guide
- Explore, recognise and compare three different 3D shapes Study Guide
- Explore, recognise and compare three more 3D shapes Study Guide
- Identify 2D shapes within 3D shapes Study Guide
- Radiating patterns Study Guide
- Recognise, describe and sort 3D shapes Study Guide
- Tetrominoes and pentominoes Study Guide
Browse all guides in the Year 1 Maths guide library.