1、Unit 3 Computers,READING,WHO AM I ?,Lead-in（ Guess! ）,A toy?,A handbag?,Computers,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 dont like me now. Do you know who I am?,abacus,Guess more:,I am very small. I can be used
2、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 Im small enough
3、 for you to take me with you.,Laptop,Do you know who I am?,A huge computer,A PC,the history of the computer,PDA,abacus,laptop,calculator,Who am I?,Pre-reading,1. Who is the speaker ?,2. Whats the passage about?,Its about the history of computer.,3. In which order is the text written?,According to th
4、e time,It is a computer.,Fasting reading to get general ideas,Reading,The computer began as a calculating machine,Alan Turing wrote a book to describe how computers could be made to work,Computers had grown as large as a room.,Computers were used in offices and homes,Computers connect people all ove
5、r the world together.,The Analytical Machine was made by Charles Babbage.,The first family of computers was connected to each other.,Careful readingto get detailed information,Reading,Over time I have been changed quite a lot.,These changes only become possible as my memory improved.,Since the 1970s
6、 many new applications have been found for me.,calculating machine,analytical machine,universal machine,PC,laptop,tubes,transistors,chips,network,World Wide Web,communications,finance,trade,robots,mobile phones,operations,space rockets,True or False,Alan Turing built an Analytical Machine to solve a
7、ny mathematical problems. People began to realize that the computer got cleverer and quicker with time passing. The computer began to serve the human race since it was brought into peoples homes. Since the 1970s, the computer was used by people around the world through the Internet. 5. The larger th
8、e computer is, the more memory it has.,F,T,F,T,F,a universal machine,its birth,I became small and thin but I got cleverer and cleverer, quicker and quicker. And my memory became so large that I couldnt believe it!,Summary of the text,Reading,I began as a _ _ in 1642 . In 1822 I was built as an _ _.
9、In 1936 Alan Turing built a _ _. As the years have_ _, I have been made_ _ _ , but I got _ _ _ , _ _ _ .,calculating machine,analytical machine,universal machine,gone by,smaller and smaller,cleverer and cleverer,quicker and quicker,Fill in the blanks:,In the 1960s they gave me a family_ _ _ _ . I wa
10、s _ _ _ _ in the 1970s. Since my birth I have truly been built to serve the human race.,brought into peoples homes,connected by a network,Discuss with your partners to list some advantages and disadvantages of the Internet.,Discussion,Advantages： (1)communicate with friends (2)listen to the music (3
11、)see films & watch news (4)play games (5)do shopping (6)save a lot of time (7)do a lot of useful things,Our life has changed!,Disadvantages： (1) Some people especially the teenagers are addicted to (痴迷） the computer games and chatting on the Internet. As a result，they have little time to study. (2)
12、Some people use the computer wrongly.,ConclusionThere is no doubt that computer has two sides, too. If we make good use of it, it will make our lives more colorful and convenient. But dont lose yourself in playing computers. Just remember: Keep fit, study well and work hard.,Homework:,Preview the language points in the passage.,
