1、Unit 3 Modern machines Reading:Computers Pre-reading:Brain-storming What can a computer do?play gamescalculatetypedraw picturesprintplay video/music First-reading2.What kind of jobs can a computer do?Computers are probably the best calculators in the world.They are faster at calculating than people,
2、and they rarely give wrong answers.They can also type,print and draw things like diagrams and graphs.They can teach you many things and also play games with you.More importantly,they can operate railways(like the underground)and fly planes and spaceships.For these reasons,we sometimes call them“elec
3、tronic brains”.type printdrawplay gamesWhat else can a computer do?calculatingRead Passage 2 quickly and find out.(1.5 min)More importantly,computers can operate railways and fly plane and spaceships.2.What kind of jobs can a computer do?Computers are probably the best calculators in the world.They
4、are faster at calculating than people,and they rarely give wrong answers.Notes:rarely:not often,seldom They can also type,print and draw things like diagrams and graphs.They can teach you many things and also play games with you.More importantly,they can operate railways and fly planes and spaceship
5、s.For these reasons,we sometimes call them“electronic brains”.Computers can also draw:曲线图、坐标、图表（数学）图解Work in pairs.Read Passage 2&3 quickly and find out the examples-Ex.A3(P35)(3 min)2.What kind of jobs can a computer do?Computers are probably the best calculators in the world.They are faster at cal
6、culating than people,and they rarely give wrong answers.They can also type,print and draw things like diagrams and graphs.They can teach you many things and also play games with you.More importantly,they can operate railways and fly planes and spaceships.For these reasons,we sometimes call them“elec
7、tronic brains”.3.Is a computer cleverer than I am?The answer to this question is,for the time being,“No”.You have greater understanding of the meaning of things than computers and can also create new ideas of your own.However,one day computers may be able to do more things than a human brain.In the
8、future,they may even be better at doing their jobs than doctors,judges and teachers.This raises interesting questions.How will computers change our lives?Will we have nothing to do?Will computers make our lives better or worse in the future?Second-readingEx.A3 Give examples(P35)2.S1 Computers can dr
9、aw things.S2 For example?S1 They can draw _ and _.3.S1 Computers can do some important jobs.S2 For example?S1 They can _ _and _ _ and _.diagramsgraphsoperateflyrailwaysplanesspaceships4.S1 A human brain can do some things better than a computer.S2 For example?S1 The brain can _ _ _.5.S1 In the futur
10、e,computers may do some jobs better than people.S2 What jobs,for example?S1 They may be better at doing jobs than _,_ and _.createnewEx.A3 Give examples(P35)ideasdoctorsjudgesteachers-a person who decides things in a court of law法官法官Look and think:What makes them work?Computers inside make them work
11、.But you might be unaware of them.(not notice 不察觉的不察觉的)1.What are the“hidden helpers”,according to the text?2.What does“hidden”mean here?3.Do you have any hidden helpers in your homes?4.Is a computer cleverer than human beings?Why/Why not?Read Passage1&3 and think(3 min):Third-reading1.Hidden helper
12、sNot so many years ago,you hardly ever saw computers.Now they seem to be everywhere.There are also many hidden“computers”in your home,but you might be unaware of them.For example,there may be one inside your TV set,telephone or washing machine.You are more dependent on computers than you know.Third-
13、readingRead and think:Questions:1.What are the“hidden helpers”,according to the text?2.What does“hidden”mean here?3.Do you have any hidden helpers in your homes?Notes:u be unaware of:没意识到没意识到,不知道不知道 u be dependent on:依靠依靠,依赖依赖u hardly:almost not 几乎不几乎不 Third-readingRead and think:Is a computer cleve
14、rer than human beings?Why/Why not?3.Is a computer cleverer than I am?The answer to this question is,for the time being,“No”.You have greater understanding of the meaning of things than computers and can also create new ideas of your own.However,one day computers may be able to do more things than a
15、human brain.In the future,they may even be better at doing their jobs than doctors,judges and teachers.This raises interesting questions.How will computers change our lives?Will we have nothing to do?Will computers make our lives better or worse in the future?1.Read fast and get the main idea for ea
16、ch passage.Passage1:_ Topic sentence:Passage2:_ Reading BB2 More information about computers How to give a computer instructions?What can CD-ROMs or DVD-ROMs do?We give a computer instructions by putting different programs into it.Read B2 again and do T or F:()1.Its essential for programmers not to
17、make mistakes.()2.Programmers use the same language to write different programs.()3.Computer language are so easy that everyone can understand them.()4.A DVD-ROM can hold plenty of infor-mation,including pictures and sounds.FTTF Reading B Post-reading Look back to Reading A&B:1.What are these passag
18、es in common?2.The main idea for each passage in Reading A:Passage1:_ Passage2:_Passage3:_There are many hidden computers in your home.Computers can do a lot of things.Is a computer cleverer than human beings?Post-reading Look back to Reading A&B:3.How to give supporting information?Lets draw the ou
19、tline for the passages.Main idea(topic sentence)Supporting information _Passage1:_ _ _ There are many hidden computers in your home.-be unaware of-for example-be more dependent on4.Group workcomplete the outlines:Post-reading Main idea(topic sentence)Supporting information _Passage():_ _ _ _ 5.Group
20、 work Now its your turn to write a short passage about computers.First decide your topic.eg:surf the internet,an e-mail box Bill Gates 5.Group work Then you can begin to write down your outline.Main idea(topic sentence)Supporting information _ _ _ _ _ Homework 1.Finish writing the information about
21、computers.2.Complete the sentences in B1 in the students books.3.Read aloud the new words and the text.4.Talk in groups of four:Will computers make our lives better or worse in the future?And your reasons?Thats all for today.Thank you for your listening.Good-bye!1.Read Para 1,B2 quickly and answer:1
22、.How can we make a computer work?2.How can we give a computer instructions?3.Who writes the computer programs?Reading B2More information about computers B2 More information about computers 1.How can we make a computer work?We give a computer instructions.2.How can we give a computer instructions?We put different programs into it.3.Who writes the computer programs?Computer programmers.
