Mathematics

Intermediate

50 mins

Teacher/Student led

Learning Goals

Learning Outcomes

Lesson Files

+80 XP

What you need:
IWB/Projector/Large Screen
3D solids
Feature-tally table (printable)

3D Shapes: Faces, Edges and Corners

Explore the three parts that make up solid shapes: flat surfaces called faces, the lines where they meet called edges, and the points where edges meet called corners. Count them on cubes, cuboids, cylinders and cones.

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1 Getting Started
2 Watch and Notice
3 Try It Together
4 Build the Table in Your Copy
5 Class Challenge
6 What Did We Notice?
7 What's Next
Pupil practice

1 - Getting Started ~4 mins

Illustration for Getting Started

Key point

Hold a dice in your hand. Can you point to a flat part? Now find a line part. Now find a pointy part. Every solid shape is made of these three things, and today we are going to name them.

👇 Mark your steps as done as you complete them.

+5 XP

2 - Watch and Notice ~9 mins

Look at each solid on the board. A face is a side of the solid, flat or curved. An edge is the line where two faces meet. A corner is the point where edges meet. Watch how many of each the cube has, then the cuboid, then the cylinder, then the cone. The last two catch people out.

👇 Mark your steps as done as you complete them.

+10 XP

3 - Try It Together ~8 mins

Key point

Today we work through these solids together on the board: first the cube, then the cuboid, then the cylinder, then the cone. For each one, a pupil taps every face, then every edge, then every corner to tally how many there are. As the group's solid is passed round, check the count against it, or against the shape shown on the board.

Tally the parts

+15 XP

4 - Build the Table in Your Copy ~2 mins

COPYBOOK MOMENT

In your maths copy, rule a simple table with three columns headed faces, edges and corners. Then fill in the row for a cube, counting from your group's dice in turn.

+10 XP

5 - Class Challenge ~8 mins

Key point

Answer each question on the board in turn. The last one, how many corners a cone has, is the tricky one. Before checking, the pupil at the board says what counts as an edge and the class agrees. Then that pupil taps the answer on the board and presses Check.

Count the parts

+15 XP

Pupil practice

Module 7 · 2D and 3D Shapes and Angles Shape & Space

Lesson 83 · 3D Shapes: Faces, Edges and Corners

Download Activity Book page (PDF)

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3D Shapes: Faces, Edges and Corners

Teacher Class Feed

1 - Getting Started ~4 mins

2 - Watch and Notice ~9 mins

3 - Try It Together ~8 mins

Tally the parts

4 - Build the Table in Your Copy ~2 mins

5 - Class Challenge ~8 mins

Count the parts

Unlock the full learning experience

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