1. Unit 3 Computers

2. Riddles(谜语):
Computers
A handbag?
A toy?

3. Riddles(谜语):
I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they don’t like me now.
Do you know who I am?
abacus

4. Riddles(谜语): calculator Do you know who I am? I am very small.
I can be used for calculating.
In China, a lot of students use me when solving mathematical problems.
Do you know who I am?
calculator

5. Riddles(谜语): Do you know who I am? Notebook / laptop
I can be used for calculating. Besides,
I can also be used for watching DVD, sending and communicating through the Internet. However, I am not a PC, because I’m small enough for you to take me with you.
Do you know who I am?
Notebook / laptop

6. the history of the computer
A huge computer
the history of the computer
A PC
PDA / Palmtop

7. in common: for or by all of a group
共同的；共有的；共用的
the land owned in common by the residents 居民共有的土地
in common 常常同have连用，如：
have nothing in common 无共同之处
have little in common 几乎无共同之处
have something in common 有一些共同
have a lot in common 有许多共同之处

8. What do they have in common?
A huge computer
What do they have in common?
A PC
Palmtop

9. (What do they have in common?)
Discussion
(What do they have in common?)
1.They can be used for calculating.
2.They can deal with
maths problems.
3.They are our friends.
4.They are useful and helpful.
I think that…
In my opinion…
I believe that…
What’ s your reason?
Why do you think so?

10. Give the English name for the computer components (组件)
How much do you know
about a computer???
Give the English name
for the computer
components (组件)

11. What is it in English??
Main board(主板)

12. CPU (central processing Unit)
What is it in English??
CPU (central processing Unit)
中央处理器

13. What is it in English??
hard disc 硬盘

14. What is it in English??
Keyboard (键盘)

15. What is it in English??
Monitor显示器
Screen 屏幕

16. What is it in English??
mouse 鼠标

17. What is it in English??
DVD ROM
数字通用光盘

18. Reading
Who am I ?

19. Skimming: 1.who is the speaker ? It is a computer.
2.What’s the passage about?
It’s about the history of computer.

20. Scanning: Time 1642 1822 1960s What is the order of the text? 1970s
The Analytical Machine was made by Charles Babbage.
1936
1960s
The first family of computers was connected by a network.
1970s
now
The computer began as a calculating machine．
1822
What is the order of the text?
Alan Turing wrote a book to describe how computers could be made to work and built a “universal machine”．
Computers had new transistors and became
Small and thin.
1960s
Computers were brought into people's homes．
Computers connect people all over the world
together.

21. Charles Babbage
Alan Turing

22. Q: how did computer change in its size, intelligence, speed, function?
And how about people’s opinion?
Size:
Intelligence:
Speed:
Function:
People’s opinion:
smaller
cleverer
quicker
dealing with …, communicating with…
calculating
clever
& useful
simple-minded

23. What are today's smaller computers like?
convenient laptop
smaller desktop
What are today's smaller computers like?
palmtop

24. Discussion What can the future computer be like?
What can we do by computer in the future?
Nose-top
keyboard-vest
virtual keyboards
虚拟键盘

25. Group work You are given a chance to design a computer for yourself.
Draw a picture about it and describe(描述) what functions it has.
You will be asked to introduce(介绍) your computer. (appearance &functions)
Group work

26. Homework:
1.熟读课文,按时间顺序复述课文,记住文中的黑体字.
2.做书上P19EX1和P20EX2
3.《金牌学子》