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新人教版必修二unit3


Guess!

A handbag?

A toy?

Guess more:
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

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

I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail 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 computer/ laptop

abacus

calculator

A huge computer
laptop

Palmtop (掌上电 脑)

A PC

What’s next?

work for us in Mars(火星)

carry things

work in wars (战斗)

仿真机器人

entertainment
娱乐 What do you think will be the next development?

Who am I ?

Skimming: Go over the story to find out
who the speaker is. Write down 3 sentences to support your idea. It is a computer. ● I was built as an Analytical Machine by Charles Babbage.” ●”My real father was Alan Turing ....” ● I was able to share my knowledge with others through the World Wide Web.

Read the passage and choose the best answers.

1.What can we learn from the text? A Computer has a short history. B No one knows computer when the first computer was made. C Computers are not widely used even today. D D Computers are widely used. 2. Who was the computer’s real father? A A Alan Turning B Not mentioned in the text. C Bill Gates D Charles Babbage 3 .The computer almost changed completely _______. A in 1642 B in 1882 C C in the 1960s D in the 1970s

Scanning

Timeline

1642:_______________________________________________ The computer began as a calculating machine 1822:The Analytical Machine was made by Charles Babbage. 1936:_____________________________________________ The computer grew rapidly both in size

and in brainpower. _________________________________________
The computer had grown as large as a room. 1940s:_________________________________________ 1960s _____: The first family of computers was connected to
each other.

Computers were used in offices and homes. 1970s:_________________________________________
Now:__________________________________________ Computers connect people all over the

world together. __________________________________________

4. When were the computers connected firstly? A In the 1970s B In the early 1960s C In 1936 D In 1822 5. Which of the following statements is not right? A Computer has a long history. B Computer has changed greatly since it was first made. C Computers are widely used now. D Computer was brought into people’s home in the 1960s.

True or False
1. Alan Turing built an Analytical Machine to solve any mathematical problems. F 2. People began to realize that the computer got T cleverer and quicker with time passing. 3. The computer began to serve the human race since it was brought into people’s homes. F 4. Since the 1970s, the computer was used by T people around the world through the Internet. 5. The larger the computer is, the more memory F it has.

From the 1940s to the 1970s

The computer was made smaller, and its 5.______________ memory became better.The computer could memorize all the things During that time, the first PC and the first 6.____________ were made. laptop

In the early 7___________

1960s

network Computer were connected by a 8.____________. Through the network, people could share 9._____________knowledge and information.

Since the 1970s

Computers have been used in many ways 10._______________.

Discussion
What are the advantages and disadvantages of the computers? In my opinion,I can use the computer to….

We can use the computer to…….

Watch movies

listen to music search for …

communicate with…

do shopping

Advantages
We can use the compuers to… 1. use a computer for school work 2. play games on the computer 3. send emails to friends 4. download music and films 5. go shopping on line 6. use QQ to make friends 7. communicate with others

Disadvantages 1.Some students may get too addicted (沉 溺于)to it . 2. Some students waste too much time in playing computer games. 3. Some students spend too much time in chatting with others and may be cheated (欺骗)by someone on line. 4. As a result, they have little time to study 5. It is bad for our eyes and health to spend long time in front of computers.

Summary about the text.

began as a calculating machine The computer __________ Analytical Machine in 1642, then in 1822, it was built as an___________ Charles Babbage At the year of 1936, Alan by ________________. wrote a bookto describe how computers Turing ____________ could be made work , and build a “universal _____________to mathematical problem With the machine” to solve_________________. technology development of information __________________

in the 1960s, computers had new smaller and smaller transistors __________and became_______________, then were connected to each other by a network As the years had __________, gone by _________. brought into computers were___________,people ’s homes. Now computers have become tools the most important _________to connect people _____________all over the world together.

Homework:
1. Read the passage fluently. 2. Do Ex on period 2. 3. Retell the passage .


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