TOPIC: THREE-DIMENSIONAL SHAPES
A: TEACHING AND LEARNING MATERIALS
- Boxes.
- Balls.
- Tin cans.
- Cones.
- Models of 3-D shapes.
- Pupils’ writing books and pencils.
B: REFERENCE MATERIALS
- Scheme of work.
- Recommended Mathematics textbook for Primary 4.
- Online educational resources.
C: PREVIOUS KNOWLEDGE
The pupils can identify common plane shapes and understand that some objects have length, breadth and height.
D: PERFORMANCE OBJECTIVES
By the end of the lesson, pupils should be able to:
- Explain three-dimensional shapes.
- Identify common 3-D shapes.
- Identify faces, edges and vertices.
- Compare simple 2-D and 3-D shapes.
- Match everyday objects with their shapes.
E: CONTENT
Meaning of Three-Dimensional Shapes
Three-dimensional shapes are solid shapes that have length, breadth and height.
Examples include:
- Cube
- Cuboid
- Cylinder
- Cone
- Sphere
Cube
🎲 A dice is shaped like a cube.
A cube has:
- 6 faces
- 12 edges
- 8 vertices
Cuboid
📦 A carton is shaped like a cuboid.
A cuboid has:
- 6 faces
- 12 edges
- 8 vertices
Cylinder
🥫 A tin can is shaped like a cylinder.
A cylinder has:
- 2 flat circular faces
- 1 curved surface
Cone
🍦 An ice-cream cone has the shape of a cone.
A cone has:
- 1 flat circular face
- 1 curved surface
- 1 vertex
Sphere
⚽ A football is shaped like a sphere.
A sphere has:
- 1 curved surface
- no edges
- no vertices
F: LESSON PRESENTATION
F1: Teachers’ Activities
- Displays models of 3-D shapes.
- Explains the meaning of three-dimensional shapes.
- Identifies cube, cuboid, cylinder, cone and sphere.
- Explains faces, edges and vertices.
- Compares 2-D and 3-D shapes.
- Uses everyday objects as examples.
F2: Pupils’ Activities
- Identify 3-D shapes.
- Touch and count faces.
- Identify edges and vertices.
- Match objects with shapes.
- Compare 2-D and 3-D shapes.
- Complete written exercises.
G: CONCLUSION
The teacher revises common three-dimensional shapes and their properties.
The teacher encourages pupils to identify 3-D shapes in objects around them.
H: EVALUATION GUIDE
Pupils should be able to answer the following questions:
- Name four 3-D shapes.
- How many faces does a cube have?
- How many vertices does a cuboid have?
- Which 3-D shape looks like a football?
- Which shape looks like a tin can?
- How many vertices does a cone have?
- Does a sphere have edges?