1、Unit 3,Unit 3 Computers,Warming up,Heavy! Difficult! Hard! Tired!,Easy! Fast! Free!,monitor,keyboard,mouse,speaker,modem,scanner,printer,USB flash disc,hard disc,Label each part.,monitor,screen,CD-ROM,mouse,keyboard,hard disk,1. Look at these pictures. In pairs discuss what they have in common. 2. W
2、hat do they tell you about the development of computers? 3. What do you think will be the next development?,Whats next?,1. Look at the title of the reading passage. Predict what it is going to be about. 2. Do you know in what ways computers are used today? Work out a list and compare it with your pa
3、rtner.,Pre-reading,Skimming,Read the text quickly. 1. Who am I ?A. An operator B. Alan Turing C. A computer D. Human race,C,2. Whats the passage about? The text mainly tells us a short history of the development of the _ and its _ in different fields.,computer,applications,Scanning,Read the passage
4、and finish the timeline.,The computer began as a calculating machine.,The computer grew rapidly both in size and in brainpower.,Computers had grown as large as a room.,1960s,1936,Computers were used in offices and homes.,Computers connect people all over the world together.,Read the passage again an
5、d complete the chart below.,Careful reading,calculating,analytical,universal,mathematical problems,Medical operations,Memory,Transistors,Applications,Communication,Trade,Over time I have been changed quite a lot.,Calculating machine Analytical machine Universal machine PC laptop,These changes only b
6、ecame possible as my memory improved.,tubes transistors chips network World Wide Web,Since the 1970s many new applications have been found for me., communications finance trade robots mobile phones medical operations space rockets providing a life of high quality,the second generation(1956-1963),the
7、 third generation (1964-1971),the fourth generation(1971- ),The first generation (1945-1956),The history of computers,Summary of the passage. I began as a _ machine in 1642. It took nearly two hundred years _ I was built as an analytical machine. I became a “universal machine” in 1936 to _ any mathe
8、matical problem. I was very big at one time.,Post reading,calculating,before,solve,However, as time _ by, I was made smaller and smaller. I was given a family _ by a network in the early 1960s. I was able to _ my knowledge with others _ the World Wide Web.,went,connected,share,through,I have been wi
9、dely used in many fields, such as in communication, _ trade and medical _ . I have also been put into robots and space rockets to _ the Moon and Mars. Im glad I am a devoted friend and helper of the human race.,finance,operations,explore,What is PC? Speak the name on the whole.,It means: personal co
10、mputer.,2. What is IT?,Information Technology.,3. What is W.W.W?,World wide web.,4. 科学技术。,Science and technology.,5. 人工智能。,Artificial intelligence.,6. 笔记本电脑。,Notebook computer.,How computers have changed our lives? 1. Brainstorm a list of things that you, your school and your family use computers fo
11、r. 2. Think about what you would have to do if you could not use computers any more.,Retell the text according to the following clues and then write down your retelling.,Homework,Changes of the machine,Calculating machine,Analytical machine,Universal machine,Machine with artificial intelligence,Machine with new transistor,A family connected by a network,A family used by the Internet,Retell,
