Mathematics - Primary 5 - 3-Dimensional shapes

Term: 3^rd Term

Week 5
Class: Primary 5
Age: 10 years
Duration: 40 minutes of 5 periods
Date:
Subject: Mathematics
Topic: 3-Dimensional Shapes

SPECIFIC OBJECTIVES:

At the end of the lesson, pupils should be able to:

Make 3-dimensional shapes using their nets.
Develop interest in constructing nets of cube, cuboid, and pyramid.
Identify prisms and pyramids.
Distinguish between faces, edges, and vertices.
Solve real-life problems involving 3D shapes.

INSTRUCTIONAL TECHNIQUES:

Demonstration
Group activities
Guided discovery
Hands-on construction
Question and answer

INSTRUCTIONAL MATERIALS:

Charts showing 3D shapes and their nets
Cardboard paper for making shapes
Glue, scissors, and tape
Models of cube, cuboid, pyramid, prism
Flashcards showing features (faces, edges, vertices)
Worksheet with real-life examples

INSTRUCTIONAL PROCEDURES

PERIOD 1 and 2

PRESENTATION

Step	Teacher’s Activity	Pupil’s Activity
STEP 1 – INTRODUCTION	Introduces the topic by showing real-life objects (e.g., boxes, dice, pyramids) and linking them to 3D shapes.	Pupils observe, identify objects, and name them.
STEP 2 – EXPLANATION	Explains 3-dimensional shapes (cube, cuboid, pyramid, prism), describing their features.	Pupils listen and participate in identifying features.
STEP 3 – DEMONSTRATION	Uses flashcards to show features of each shape (faces, edges, vertices).	Pupils count and match features to the correct shape.
STEP 4 – NOTE TAKING	Pupils take notes on definitions and features of 3D shapes.	Pupils copy notes into their books.

NOTE (On the Board):

3-Dimensional Shapes

Cube: 6 faces, 12 edges, 8 vertices
Cuboid: 6 faces (rectangles), 12 edges, 8 vertices
Pyramid: Triangular or square base with faces joining at a point
Prism: A shape with two identical faces (bases) and flat sides

Exercise:

Draw and label a cube and a pyramid
List their faces, edges, and vertices

EVALUATION:

Ask pupils to identify and describe 3D shapes in the classroom.
Quiz on number of faces, edges, and vertices.

CLASSWORK:

Fill a chart showing names and features of cube, cuboid, pyramid.

ASSIGNMENT:

Look around your house and list 5 items that look like 3D shapes. Identify what shape each is.

CONCLUSION:
The teacher commends pupils’ participation and encourages them to observe 3D shapes in their environment.

PERIOD 3 and 4

PRESENTATION

Step	Teacher’s Activity	Pupil’s Activity
STEP 1 – INTRODUCTION	Reviews previous lesson and introduces the concept of nets of 3D shapes.	Pupils recall features and listen to the new topic.
STEP 2 – EXPLANATION	Explains that nets are patterns that fold into 3D shapes.	Pupils observe samples of nets on charts.
STEP 3 – DEMONSTRATION	Demonstrates how to fold a net to make a cube, cuboid, or pyramid using cardboard.	Pupils observe, then begin folding their own shapes.
STEP 4 – NOTE TAKING	Pupils copy diagrams of nets and names of corresponding shapes.	Pupils complete their notes with examples.

NOTE (On the Board):

Nets of 3D Shapes:

Cube → 6 connected squares
Cuboid → 6 rectangles
Square Pyramid → 1 square + 4 triangles

Exercise:

Match each net with the correct 3D shape
Label each net with faces and folding lines

EVALUATION:

Pupils match printed nets with their 3D shapes.
Explain how a net becomes a 3D object.

CLASSWORK:

Draw and label nets for cube, cuboid, and pyramid.

ASSIGNMENT:

Cut out and fold a cube from cardboard at home. Bring it to class.

CONCLUSION:
Teacher appreciates the pupils’ creativity and encourages them to keep practicing.

PERIOD 5

PRESENTATION

Step	Teacher’s Activity	Pupil’s Activity
STEP 1 – INTRODUCTION	Revises the meaning of nets and shapes, and links to real-life use (e.g., packaging, buildings).	Pupils answer questions and relate to real-life objects.
STEP 2 – EXPLANATION	Introduces prisms and pyramids, explains the difference and real-life use.	Pupils listen and ask questions.
STEP 3 – DEMONSTRATION	Uses models and pictures to identify real-life prisms and pyramids (e.g., roof, Toblerone pack).	Pupils bring up their own real-life examples.
STEP 4 – NOTE TAKING	Pupils take notes on types of prisms and pyramids and their uses.	Pupils copy from the board.

NOTE (On the Board):

Prisms and Pyramids

Prisms: Solid shapes with two identical faces (e.g., cuboid, triangular prism)
Pyramids: One base with faces that meet at a point
Uses:

Prisms: Packaging (juice box), furniture
Pyramids: Roof design, monuments

Exercise:

Identify whether each object is a prism or pyramid
Match real-life objects to 3D shapes

EVALUATION:

Ask pupils to classify objects in real life (prism or pyramid).
Pupils describe how 3D shapes help in construction/packaging.

CLASSWORK:

Solve worksheet on real-life problems involving 3D shapes (e.g., volume of a box, shape of roof).

ASSIGNMENT:

Draw and name three real-life examples of prisms and pyramids.

CONCLUSION:
The teacher encourages the pupils to keep observing shapes in their environment and praises their efforts.

SUMMARY OF LESSON:

This week, pupils learned how to identify and construct 3-dimensional shapes using nets. They explored cubes, cuboids, pyramids, and prisms, and learned to recognize these shapes in real-life objects. Through cutting, folding, drawing, and comparing, pupils developed an interest in geometric construction and applied it to real-world scenarios.