Mathematics - Junior Secondary 2 - Whole numbers (continued)

Whole numbers (continued)

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TERM: 1st TERM

WEEK 2
Class: Junior Secondary School 2
Age: 13 years
Duration: 40 minutes of 5 periods
Subject: Mathematics
Topic: Whole Numbers Continued
Focus: Lowest Common Multiple (LCM), Highest Common Factor (HCF), Square and Square Roots, Quantitative Reasoning

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

  1. Find the LCM and HCF of numbers.
  2. Identify square numbers and find the square roots of numbers.
  3. Solve problems involving LCM, HCF, square and square roots.
  4. Apply reasoning skills to solve quantitative problems.

INSTRUCTIONAL TECHNIQUES:

  • Question and answer
  • Guided demonstration
  • Discussion
  • Drills and exercises
  • Real-life application

INSTRUCTIONAL MATERIALS:

  • Whiteboard and marker
  • Flashcards
  • Worksheets

 

PERIOD 1 & 2: Lowest Common Multiple (LCM)
PRESENTATION:

Step

Teacher’s Activity

Pupil’s Activity

Step 1 - Introduction

Introduces the concept of LCM and its importance in finding common multiples.

Pupils listen and ask questions.

Step 2 - Explanation

Explains how to find the LCM using prime factorization and listing multiples.

Pupils practice finding LCM with examples.

Step 3 - Demonstration

Uses examples to demonstrate finding the LCM of 12 and 18.

Pupils work on finding the LCM of given numbers.

Step 4 - Note Taking

Teacher writes down the method of finding LCM, pupils copy the notes.

Pupils take notes.

NOTE ON BOARD:

  • LCM of 12 and 18 = 36
  • LCM of 8 and 14 = 56

EVALUATION (5 exercises):

  1. Find the LCM of 9 and 15.
  2. Find the LCM of 4 and 6.
  3. Find the LCM of 10 and 20.
  4. Find the LCM of 5 and 25.
  5. Find the LCM of 18 and 24.

CLASSWORK (5 questions):

  1. Find the LCM of 8 and 12.
  2. Find the LCM of 6 and 15.
  3. Find the LCM of 7 and 28.
  4. Find the LCM of 9 and 27.
  5. Find the LCM of 18 and 30.

ASSIGNMENT (5 tasks):

  1. Find the LCM of 36 and 48.
  2. Find the LCM of 32 and 80.
  3. Find the LCM of 45 and 60.
  4. Find the LCM of 9 and 25.
  5. Find the LCM of 16 and 24.

 

PERIOD 3 & 4: Highest Common Factor (HCF)
PRESENTATION:

Step

Teacher’s Activity

Pupil’s Activity

Step 1 - Introduction

Introduces the concept of HCF and explains its importance in finding common factors.

Pupils listen and ask questions.

Step 2 - Explanation

Demonstrates how to find the HCF using prime factorization and listing factors.

Pupils practice finding HCF with examples.

Step 3 - Demonstration

Uses examples to demonstrate finding the HCF of 15 and 25.

Pupils work on finding the HCF of given numbers.

Step 4 - Note Taking

Teacher writes down the method of finding HCF, pupils copy the notes.

Pupils take notes.

NOTE ON BOARD:

  • HCF of 15 and 25 = 5
  • HCF of 24 and 30 = 6

EVALUATION (5 exercises):

  1. Find the HCF of 12 and 18.
  2. Find the HCF of 20 and 40.
  3. Find the HCF of 25 and 30.
  4. Find the HCF of 32 and 64.
  5. Find the HCF of 15 and 45.

CLASSWORK (5 questions):

  1. Find the HCF of 14 and 28.
  2. Find the HCF of 10 and 20.
  3. Find the HCF of 50 and 100.
  4. Find the HCF of 30 and 60.
  5. Find the HCF of 40 and 80.

ASSIGNMENT (5 tasks):

  1. Find the HCF of 72 and 96.
  2. Find the HCF of 18 and 27.
  3. Find the HCF of 60 and 90.
  4. Find the HCF of 14 and 35.

Find the HCF of 28 and 42.