Prime and Composite Numbers

LC: Identify prime and composite numbers.

I. Learning Objectives: After the activity, pupils shall be able to:
Eoc: differentiate prime from composite numbers.
Eop: write all prime numbers between the given numbers correctly.
Eoa: find joy in doing the activity.

II. Learning Content:
Topic: Prime and Composite Numbers
Concept: Prime Numbers – are numbers with only 2 factors; 1 and itself
Composite Numbers-are numbers with more than two factors
Skill: Differentiating a prime number from composite number
Values: Doing work joyfully.
Material: old calendar
Resources: Apistar, E. (2005), Soaring 21st Century
Glencoe, Mathematics Applications and Connection
www.lessonpage.com

III. Learning Experience:
Classroom Routine - checking of attendance, ID, etc.

A. Introduction:
Activity 1: Factor and Multiple Finding Game
·What do you mean by factors? multiples?

B. Interaction:
Activity 2: Prime and Composite Hunting!
Materials: Calendar, Marker

Procedures:
a. Cross out 1 since 1 is neither a prime nor a composite number.
b. Encircle 2 and cross out all multiples of 2.
c. Encircle 3 and cross out all multiples of 3
d. Encircle 5 and cross out all multiples of 5
e. We continue 7, and so on. The numbers which are not crossed are
prime numbers.


· What are the encircled numbers?
· What are the crossed out numbers?
· What are the factors of the numbers being encircled?
· How about the factors being crossed out?
· What numbers given have more than two factors?
· What numbers given above have two factors only?

C. Integration:
1. Generalization: 2 minutes-writing

· How do you differentiate prime numbers from composite numbers?

2. Reflection:
Did you enjoy in the activity?

3. Evaluation: Answer page 37-A.

Write all prime numbers between.
a. 10 and 50
b. 70 and 90

IV. Assignment: Drill Notebook

Why do you think prime and composite numbers are necessary for our
succeeding lessons?