Expected learning outcomes Materials required Key words/terms Previous Knowledge Warm up Teaching the lesson Lesson Plan Chapter 3: Factors and Multiples Students should be able to: • find out HCF and LCM of two or more numbers • test divisibility of a number by 2, 3, 4, 5, 8, 9, 10, 11 • learn about prime and composite numbers counters or buttons multiples, factors, divisibility rules, highest common factor (HCF), lowest common multiple (LCM) Multiplication and division Use the recall activity to recap ‘factors’, ‘multiples’, ‘prime and composite numbers’. After that, let the students solve the recall exercise. If many students find it difficult to solve the recall exercise, spend some time consolidating the concepts before moving forward. Divisibility Rules (Page 40): Students have already learnt some divisibility rules in class IV. Let them recall each divisibility test one by one. Then explain the other divisibility rules as explained on page 41. Let the students solve Exercise 3.7. Make it a timed exercise so that the students apply the divisibility tests rather than solving the problems. Prime and Composite numbers (Page 43): Write ‘Prime Factors’ on the board and ask students what they understand by this term. Give them some time to think and respond. Encourage students to focus on the meaning of these words. Guide them to conclude that the prime numbers that are the factors of any number are called ‘Prime Factors’. Also explain about composite numbers. Refer to page 43 to explain the concept. Then guide them to complete Check What You Know Exercise 3.2. Highest common factors (Page 47): Suggestions for follow up and further activities Students have already learnt HCF in their previous class. Help them recall the concept by asking them related questions. Invite students to come to the front of the class and explain the method of prime factorization to find HCF. Fill in the gaps if needed. Let the students solve some practice questions from Check What You Know Exercise 3.3. Then explain that there is another method of finding HCF by prime factorization and by division method. Explain the method with the help of examples given on page 48. Once the second method is also understood, let the students solve the rest of the questions from Check What You Exercise 3.3. Least common multiple (Page 50): Students have already learnt LCM in their previous class. Help them recall the concept by asking them permanent questions. Invite students to come to the front of the class and explain the method of prime factorization to find LCM. Fill in the gaps if needed. Let the students solve some practice questions from Exercise 3.4. The division method of finding LCM can be explained with the help of the examples given on page 51. Once the second method is also understood, let the students solve the rest of the problems in Check What You Know Exercise 3.4. Co‐relation between HCF and LCM (Page 53): Divide students into pairs and let them read the relationship between LCM and HCF given on page 53. Follow it up with a discussion and clarify doubts if any. Then to practice the concept, ask them solve Exercise 3.5. To begin the lesson, give the students a KWL table to fill with what they know about ‘Factors and Multiples’. The KWL chart is shown below. What I Know What I will What I have learnt The worksheet has MCQs, HOTS questions and a fun activity. It can be used to assess if the students have understood the necessary concepts and can apply the knowledge and skills gained. Practice time learn