3. 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 Guessing Game:

4. 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. A notebook computer Do you know who I am?

5. 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

6. A huge computer I am built to solve some mathematical problems. But I am too big. Do you know who I am?

7. I can be used as a laptop, however, I am not a laptop, because I’m small enough for you to hold me in your hand. Do you know who I am? PDA (personal digital assistant)

8. A PC personal computer I am the common computer which can solve all kinds of problems and is used widely now. Do you know who I am?

9. Who am I ?

10. Skimming: It is a computer. 1.Who is the speaker ? 2.What is the passage mainly about? It’s about the history and applications of the computer.

11. Computers connect people all over the world together. 1642 1822 Now 1936 1960s 1970s The computer began as a calculating machine. The analytical machine was built by Charles Babbage. Alan Turing wrote a book about how computers could be made to work as a universal machine. The first family of computers was connected to each other. Computers were used in offices and homes. The history of the computer: 1940s The computer had grown as large as a room. Timeline (What happened?)

12. What are the applications of the computer? Applications Communication Space rockets Finance Trade Robot Mobile phone Medical operation

13. 3. In what other ways do we say the computer changed? What are they? 2. “I was able to share my knowledge with others through the World Wide Web.” What does “others” refer to? Further Understanding 1. Can we say the larger the computer is, the larger memory it has? Other computers

14. Discussion 1. In what other ways do we say the computer changed? What are they? smaller quicker cleverer calculate →solve mathematical problems → deal with information→ communicate with people simple-minded----clever & useful People’s opinion: Function: Speed: Intelligence: Size:

15. Listen to the tape. True or False 1.Alan Turing built an Analytical Machine to solve any mathematical problems. 2.People began to realize that the computer got cleverer and quicker with time passing. 3.The computer began to serve the human race since it was brought into people ’ s homes. 4.Since the 1970s, the computer was used by people around the world through the Internet. 5. The larger the computer is, the more memory it has. F T F T F Charles Babbage its birth The memory of computers has no relationship with their size.

16. Cloze test: I began as a _______ ________ in 1642 in France. In 1822 I was built as an _____ ______. Then in 1936 Alan Turing wrote a book and built a _______ ______. As time ___ ___, I was made_______. These changes because my _____ _______. In the 1960s they gave me a family____ __ __ _____. Now people call it the World Wide Web. I have been _____ ____ ____ ___ since the 1970s.So I became PC. I’m happy to become a devoted friend and helper of the human race. calculating machine analytical machine universal machine went by connected by a network used in offices and homes smaller memory improved

17. Guess! A toy? A handbag?

18. Suppose you were a computer designer. How do you design your computer ? What would you like it to look like? What are some of the things you would like it to do? What’s your dreamy computer? Discussion Well, I’d like to design my computer in this way. Since I like dogs very much, I will make it the shape of a dog. Every morning, I’d like it to wake me up and fetch me what I ask it to take. Then it will go to school with me and carry my bag for me. Maybe at least it will cost 2,000 yuan, but it’s worth it.

19. Choose the best answers What’s the main idea of the text? A. The computer wants to find “who he is”. B. The function( 功能 ) of the computer. C. The computer becomes popular around the world. D. The history and the applications of the computer.

20. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told! Simile( 明喻） As I grow older I have also grown smaller. In shape In memory