Mathematics - Primary 6 - Perimeters and Areas of Plane Shapes

Perimeters and Areas of Plane Shapes

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Term: 2nd Term

Week 8

Class: Primary 6
Age: 11 years
Duration: 40 minutes of 5 periods
Date:
Subject: Mathematics
Topic: Perimeters and Areas of Plane Shapes

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

  1. Discuss the properties of plane shapes (rectangle, square, circle, and triangle).
  2. Calculate the perimeter of rectangles, squares, circles, and triangles.
  3. Apply the perimeter formulae to real-life situations.
  4. Understand and calculate the area of plane shapes.
  5. Solve problems related to the perimeter and area of shapes.

INSTRUCTIONAL TECHNIQUES:

  • Demonstration
  • Group activities
  • Problem-solving approach
  • Use of teaching aids (measuring tapes, shape cutouts, etc.)
  • Interactive discussions

INSTRUCTIONAL MATERIALS:

  • Measuring tapes
  • Flashcards of shapes
  • Shape cutouts (rectangles, squares, circles, and triangles)
  • Markers, whiteboard, and erasers
  • Worksheets for exercises

INSTRUCTIONAL PROCEDURES:

PERIOD 1 and 2:
PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

STEP 1 – INTRODUCTION

Introduces plane shapes (rectangle, square, circle, and triangle), their properties (sides, angles).

Pupils listen and ask questions.

STEP 2 – EXPLANATION

Rectangle: P = 2(l + b)

Pupils observe the demonstration and take notes.

 

Square: P = 4s

 

 

Circle: P = 2πr

  

 

Triangle: P = a + b + c

  

 

    

STEP 3 - DEMONSTRATION

Demonstrates calculating the perimeter using real-life examples.

Pupils solve perimeter problems on their own using the formulae.

STEP 4 - NOTE TAKING

Pupils take notes on perimeter calculations and formulae.

Pupils take notes on how to calculate the perimeter of shapes.

NOTE (On the Board):
Perimeter of Shapes:

  • Rectangle: P = 2(l + b)
  • Square: P = 4s
  • Circle: P = 2πr
  • Triangle: P = a + b + c

EVALUATION:

  • Ask pupils to calculate the perimeter of given shapes (real-life examples).
  • Provide problems for pupils to solve individually.

CLASSWORK:

  • Calculate the perimeter of the following shapes: rectangle (length = 8 cm, breadth = 5 cm), square (side = 6 cm), circle (radius = 7 cm), and triangle (sides = 5 cm, 7 cm, 9 cm).

ASSIGNMENT:

  • Find and measure objects at home that resemble these shapes and calculate their perimeters.

CONCLUSION:

  • The teacher commends the pupils positively for their participation and understanding of perimeter.

 

PERIOD 3 and 4:
PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

STEP 1 – INTRODUCTION

Recap the previous lesson on perimeter and introduce the concept of area.

Pupils recall perimeter calculations.

STEP 2 – EXPLANATION

Explains how to calculate the area of plane shapes using formulae:

  
  • Rectangle: A = l × b
  • Square: A = s²
  • Circle: A = πr²
  • Triangle: A = ½bh | Pupils listen and take notes on the formulae.
    STEP 3 - DEMONSTRATION | Demonstrates how to calculate the area of different shapes with examples. | Pupils follow along and calculate the area of shapes.
    STEP 4 - NOTE TAKING | Pupils take notes on how to calculate the area of various shapes. | Pupils write down the formulae for area.

NOTE (On the Board):
Area of Shapes:

  • Rectangle: A = l × b
  • Square: A = s²
  • Circle: A = πr²
  • Triangle: A = ½bh

EVALUATION:

  • Ask pupils to solve problems related to calculating the area of different shapes.
  • Provide additional examples for pupils to practice individually.

CLASSWORK:

  • Calculate the area of the following shapes: rectangle (length = 10 cm, breadth = 6 cm), square (side = 4 cm), circle (radius = 5 cm), and triangle (base = 6 cm, height = 8 cm).

ASSIGNMENT:

  • Calculate the area of objects at home that resemble these shapes.

CONCLUSION:

  • The teacher commends the pupils for their active participation and reinforces the importance of practice.

 

PERIOD 5:
PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

STEP 1 – INTRODUCTION

Recap the lessons on perimeter and area and focus on real-life applications.

Pupils recall previous concepts and their real-life uses.

STEP 2 – EXPLANATION

Discusses how perimeter and area are used in real-life situations (e.g., fencing a yard, painting a wall).

Pupils listen and engage in a short discussion.

STEP 3 - DEMONSTRATION

Provides real-life examples of problems involving both perimeter and area.

Pupils work in groups to solve real-life perimeter and area problems.

STEP 4 - NOTE TAKING

Pupils take notes on real-life applications.

Pupils discuss and take notes on real-life applications of perimeter and area.

EVALUATION:

  • Provide real-life problems for pupils to solve in groups.
  • Ask pupils to apply perimeter and area to real-life examples.

CLASSWORK:

  • Solve a real-life problem involving perimeter and area (e.g., calculate the area for painting a rectangular wall).

ASSIGNMENT:

  • Find examples of real-life applications of perimeter and area (e.g., a garden, a playground) and calculate the area and perimeter.

CONCLUSION:

The teacher commends the pupils for their effort and encourages them to apply what they have learned to real-life situations.