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Subject: Mathematics
Semester: 2
Period: 5
Week: 27
WEEK 27
Class: Grade 7
Age: 12 years
Duration: 40 minutes of 5 periods
Subject: Mathematics
Topic: Three-Dimensional Shapes
Focus: Identification of 3D Shapes and Properties of Cubes and Cuboids
SPECIFIC OBJECTIVES:
By the end of the lesson, pupils should be able to:
- Identify and name different three-dimensional shapes.
- Describe the properties of cubes and cuboids.
- Compare and contrast cubes and cuboids.
- Recognize three-dimensional shapes in real-life objects.
- Apply the knowledge of 3D shapes to real-life situations.
INSTRUCTIONAL TECHNIQUES:
- Question and answer
• Guided demonstration
• Discussion
• Drills and exercises
• Real-life application
INSTRUCTIONAL MATERIALS:
- Models of 3D shapes (cubes, cuboids, spheres, cones, cylinders)
• Flashcards
• Whiteboard and marker
• Measuring tapes/rulers
PERIOD 1 & 2: Identification of Three-Dimensional Shapes
PRESENTATION:
|
Step |
Teacher’s Activity |
Pupil’s Activity |
|
Step 1 - Introduction |
Introduces 3D shapes: cube, cuboid, sphere, cone, and cylinder. |
Pupils listen and ask questions. |
|
Step 2 - Explanation |
Defines and describes the properties of cubes and cuboids. |
Pupils observe and ask questions. |
|
Step 3 - Demonstration |
Shows physical models of 3D shapes. |
Pupils identify shapes from models. |
|
Step 4 - Note Taking |
Pupils write down the properties of each shape. |
Pupils copy notes. |
NOTE ON BOARD:
- Cube: 6 equal square faces, 12 edges, 8 vertices.
- Cuboid: 6 rectangular faces, 12 edges, 8 vertices.
- Sphere: 1 curved face, no edges or vertices.
- Cone: 1 circular face, 1 vertex, 1 curved edge.
- Cylinder: 2 circular faces, 1 curved surface, no vertices.
EVALUATION (5 exercises):
- Identify and name the 3D shapes from a set of flashcards.
- How many edges does a cube have?
- What is the difference between a cube and a cuboid?
- How many faces does a sphere have?
- Name two 3D shapes with no vertices.
CLASSWORK (5 questions):
- Draw and label a cube and a cuboid.
- Identify the 3D shape that has 2 circular faces and no vertices.
- Write the number of faces, edges, and vertices for a cube.
- Compare a cone and a cylinder.
- Identify 3 objects in the classroom that resemble 3D shapes.
ASSIGNMENT (5 tasks):
- Draw a 3D shape with 6 square faces.
- Identify a real-life object that is a sphere.
- List 5 3D shapes.
- Name the properties of a cone.
- Write the differences between cubes and cuboids.
PERIOD 3 & 4: Properties of Cubes and Cuboids
PRESENTATION:
|
Step |
Teacher’s Activity |
Pupil’s Activity |
|
Step 1 - Introduction |
Reviews properties of cubes and cuboids. |
Pupils recall information from previous lessons. |
|
Step 2 - Explanation |
Shows examples of real-life cubes and cuboids. |
Pupils discuss examples. |
|
Step 3 - Demonstration |
Solves problems involving dimensions of cubes and cuboids. |
Pupils solve problems with guidance. |
|
Step 4 - Note Taking |
Teacher writes summary, pupils copy notes. |
Pupils take notes. |
NOTE ON BOARD:
- Cube: All faces are squares; all sides are equal.
- Cuboid: Faces are rectangles; opposite faces are equal.
EVALUATION (5 exercises):
- How many faces does a cuboid have?
- How many vertices does a cube have?
- Calculate the volume of a cube with side length 4 cm.
- How many edges does a cuboid have?
- Calculate the volume of a cuboid with length 3 cm, width 5 cm, and height 6 cm.
CLASSWORK (5 questions):
- Draw a cube and a cuboid.
- Identify the volume of a cube with side length 7 cm.
- Find the volume of a cuboid with length 6 cm, width 4 cm, and height 2 cm.
- List the properties of a cube.
- Write the differences between a cube and a cuboid.
ASSIGNMENT (5 tasks):
- Draw and label a cube and cuboid.
- Calculate the volume of a cube with side length 10 cm.
- Calculate the volume of a cuboid with dimensions 8 cm, 3 cm, and 5 cm.
- Identify a real-life example of a cuboid.
- Discuss how the properties of a cube are used in daily life.