The technology develops so quickly that many new things appear in human being’s life.

Let’s guess what they are:

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

abacus

Guess :

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

calculator

Solve a riddle : one thing

It has a big face with many keys

It has two big ears which can play musicYou can watch TV or see a movie using it

It can be seen in the office, classroom and at home.

It can download information

guess

Do you know who I am ?

A huge A huge computer computer

“银河”巨型计算机

A PC= personal computer A PC= personal computer

A notebook A notebook computer computer

We can see many brands of computers

Lenovo 联想 Haier 海尔

神州

Tinghuatongfang 清华同方

惠普

Dell

TCL Acer 宏基

thinking

1. What do they have in common?

（ Using some of the following expressions in your discussion. ）

I think that… In my opinion…

I believe that… What’ s your reason?

Why do you think so?

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. ……

Reading Reading

Unit 3 Computer

Scan the text and then answer the following questions:

1.Who is the speaker?

2.What the text might be about?

Scanning

1.Who is the speaker ?

It is a computer.

• This reading passage is mainly about the and the of the computer.

historydevelopment

1.Where were you in 1642?

3 What were you called in 1936?

4 What did you get in the 1960s?

What happened to you in the 1970s?

2 What happened to you in 1822?

Timeline 1642: _____________________________________________________________: The Analytical Machine was Made by Charles Babbage.1936:_________________________________________________________________________________________1960s:________________________________________________________________________________________

The computer began as a calculating machine in France.

1822

Alan Turing wrote a book to describe how computers could be made to work.

Computers have new transistors and became smaller.

_____: The first family of computerswas connected to each other.1970s: ________________________________________________________Now:__________________________________________________________

1960s

Computers were brought into people’s homes.

Computers connect people all over the world together.

True or falseTrue or false • 1. Charles Babbage was the computers’ real

father.

• 2. The speaker was built as an Analytical Machine in 1822.

• 3. The speaker was called a calculating machine in 1936.

• 4. The speaker was given a family connected by a network in the late 1960s.

F F

[ [ Alan Turing.Alan Turing. ] ]

TT

[ [ a universal machinea universal machine ] ]

[ [ in the early 1960sin the early 1960s ] ]

F F

F F

Q1: How did the computer work as an Analytical Machine? The computer followed instructions from cards with holes.Q2: In which way did computers talk to humans? Using BASIC.Q3: What does “others” (2.6) refer to? Other computers.

3. Questions

Q4: Why did people think the computer was simple-minded?

Because the computer was made as a calculating machine and was used to solve mathematical problems.

Q5: In how many ways do we say the computer changed? What are they?• Size: • Intelligence:

• Speed:

• Function:

• People’ opinion:

smaller

quicker

cleverer

calculating----dealing with …, communicating with…

simple-minded----clever & useful

a personal computer

a calculating machine

an analytical machine

a notebook computer

a huge computer

1

2

3

4

5

Changes in size• 1._______________ (earlier)

• 2._______________ ( in the past)

• 3.____________________ (modern)

not very bighuge

smaller and thinner

Changes of the machine

Calculating machine

Analytical machine

Universal machine

artificial intelligence

PC (desktop/ notebook)

Internet ?

Time

Development in functionscalculatecalculating machine ---

Analytical Machine ---follow instructions

universal machine--- solve mathematical problems; artificial intelligence

Computer connected by a network

share information with others; talk to each other; deal with information; communicate with each other

Discussion:

what other functions will computers have in the future? Or what will computers be like?

Use the following expressions:

• I think that……

• In my opinion……

• I believe that……

• It would be nice if……

• richer and richer;

• stronger and stronger;

• easier and easier

Then what should we do if we want to develop more functions of the computer?

Study hard.

Learn as much knowledge as we can.

Prepare to become great scientists!

Summary

The history of computers

Name : computer Born : (time)_______ (place)_____ My father: _____________________My size: 1._______________(earlier) 2._______________( in the past) 3.____________________(modern)My history: 1. 1642 ___________machine 2. 1822__________machine 3. 1936 __________machine 4. 1960s computers with _________ 5. 1970s ______ and ________ computers.My usage: 1. ____________ 2.____________ 3.____________

1642 France Alan Turing

not very bighugesmaller and thinner

Analytical calculating

universaltransistors

PC notebookshare information.communicate with others.serve the human race.

Now people can use computers to deal with information and communicate with each other around the world by __________ . But the development of computers has a long history. In 1642, the first computer only worked as a ________________ . In 1822, an Analytical Machine was invented. In 1936 ,a machine was built. In ________ ,after getting new computers became ________________ in size, got cleverer and cleverer in intelligence, and became________________ in speed. Then they could be connected with other computers by a network, and ________ could talk to them using BASIC. In the 1970s ,people began to bring them into their homes.

SumSummary mary

the Internetthe Internet

calculating machinecalculating machine

the 1960sthe 1960ssmaller and smallersmaller and smaller

quicker and quickerquicker and quicker

humanshumans

universaltransistors,

People say computers have more advantages than disadvantages. Do you think so?

advantages disadvantages

A B

Such as :Send an e-mailIt is bad for your eyes

Download( 下载 ) informationSee a movie or watch TVPlay computer games

Buy goods you want Do some chatting

advantages

- - - - - - -

improve people's ability of thinking

Too expensive

Addicted to playing computer games

- - - - - - -

disadvantages

People can not write right Chinese letters

Virtual things ( 虚拟的 )

1.Should students surf the Internet?

2.Should students go to the net bar?

net bar

at home

Homework