AC230 powerpoint

1. IDENTIFYING PRIME NUMBERS
AC230 Midterm Presentation
Yang Yang Li

2. LEARNING OBJECTIVES:
 Let students to watch two videos that is regarding
to the lesson today in the beginning class.
 Divide students into a small groups, and to working
on some problems together as a group.
 Come out the answers and share to the
classmates.

3. BEGINNING THE CLASS:
 Students should remove their jackets and
backpacks, then hanging inside the closet.
 Taking out a book, piece paper and pencil to write
with.
 Then quietly sit down in their seat.

4. DO NOW:
 Watch two YouTube videos about today’s topic
---------prime numbers.
 Take notes down.

7. GROUPING
 After watch the videos, students will divide into a
groups, each group should not be more than 6
members.
 Each one will responsible to participate and working
together to answer the few questions.
 Each group will be compete to other group.
 The winner group will get free one day no
homework pass.

8. QUESTIONS:
 What is prime numbers by the definition?
Provide some examples.
 How can you identify prime numbers?
 What is composite numbers? Provide some
examples.

9. ANSWERS:
Q1)What is prime numbers by the definition?
Provide some examples.
Ans: A prime number is a natural number that is greater
than 1, no positive divisions other than 1 and itself.
Exmaples: 3,5,7,11……

10. ANSWERS CONTINUE:
Q2) How can you identify prime numbers?
Ans: We can identify prime numbers in many ways: 1) the
number can only divide 1 and itself.2) using the prime
factorization tree.
Q3) What is composite numbers?
Ans: Composite number is the numbers that have more than two
factors that can be divides exactly into another numbers.
Examples: 4,10,12,20,30……

11. IN THE END:
Conclusion:
Throughout this lesson, I will let students to know what is
prime number, composite number, and how to identify the
prime numbers.
Summarize:
You may notice the prime numbers is exist as big numbers
and small numbers. The smallest prime number is two. The
largest prime number is at infinity. Grouping is the key to help
determine if a number is prime or not. These groupings are
also known as factors. Composite numbers is number that
have more than two factors which can be divides exactly into
another numbers.