Mathematics - Primary 1 - Subtraction of Whole Numbers Not Greater Than 20

Subtraction of Whole Numbers Not Greater Than 20

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Term: 2nd Term

Week: 6

Class: Primary 1
Age: 6 years
Duration: 40 minutes (4 periods)
Date:
Subject: Mathematics
Topic: Subtraction of Whole Numbers Not Greater Than 20

 

SPECIFIC OBJECTIVES:

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

  • Subtract numbers within 20.
  • Understand the relationship between addition and subtraction.

 

INSTRUCTIONAL TECHNIQUES:

  • Demonstration using a number line.
  • Problem-solving.

INSTRUCTIONAL MATERIALS:

  • Counters.
  • Number line chart.
  • Chalkboard and chalk.

 

INSTRUCTIONAL PROCEDURES

 

PERIOD 1 and 2:

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1: INTRODUCTION

- Greet pupils and introduce subtraction within 20. - Demonstrate subtraction with objects and number lines (e.g., 15 – 7).

- Greet the teacher. - Observe the demonstration on the number line.

STEP 2: EXPLANATION

- Explain subtraction using objects and number lines. - Write problems like 18 – 10 on the board.

- Follow along and ask questions as needed.

STEP 3: INTERACTIVE SESSION

- Pupils to practice subtraction using objects or number lines. - Guide them through the exercises.

- Solve subtraction problems individually with guidance.

STEP 4: NOTE TAKING

- Write problems on the board and ask pupils to write them in their notebooks.

- Copy the problems and answers into their notebooks.

 

EVALUATION:

  1. Subtract 12 – 5.
  2. What is 19 – 8?

CLASSWORK:

  • Pupils complete subtraction problems in their notebooks (e.g., 14 – 7).

CONCLUSION:

The teacher praises the pupils and reinforces their progress.