高一英语必修2Unit3 Computers教案(共16页)

1、M2 Unit3ComputerPeriod 1:Warming up (WHO AM I?) Warming up This section is an introduction to the topicIt is to get the students thinking about the different ways computers can be madeDo this part of the lesson in pairs and as a speaking activityWarming up by talking about computer Look at the pictu

2、res on page 17. What are they? What do they have in common? Yes, they are computers. Then what is a computer? A computer is a machine which stores knowledge in its memory and does calculations on that knowledge. This knowledge is stored in symbols; it is called data. A computer usually has a monitor

3、 to show results. However, some computers can speak; these computers can be used for voice mail. Draw on the blackboard a diagram to illustrate the influence of the computer and the Internet over the school educationBelow is a diagram you may like to useAsk students to look at the diagram and consid

4、er, ”What changes have computers and the Internet brought to schools? What changes will they bring to schools in the future?”Ask the Ss to work in groups and to make a list of the possible changes they can think ofWhen most of the groups have their lists ready, the teacher can hold a class discussio

5、nWrite down the major changes the students think of under / beside the diagramThe teacher can add one or two changes that may affect their own teachingFor example, “Computers and the Internet can help busy parents contact teachers by email”The teacher can end the task with a brief summary, or hold a

6、 further discussion to find out students personal opinions about the changesFor example, ask them, “Do you like all these changes? Why and why not? What changes do you like / dislike?”Some information:计算机室 A computer frequently requires a boot device. The boot device contains the computers operating

7、 system and data. Computer programs can be installed onto a computer. Some people think that computers are less useful if they do not have access to the Internet. They think this because the Internet allows the computers to send and receive data and email across the world. 曙光3000巨型计算机 A computer is

8、now almost always an electronic device. It usually contains materials which are toxic; these materials will become toxic waste when disposed of. When a new computer is purchased in some places, laws require that the cost of its waste management must also be paid for. This is called product stewardsh

9、ip. In some countries old computers are recycled (melted down) to get gold and other metals. This is dangerous, because this procedure releases the toxic waste into the water and soil. Computers become obsolete quickly. Very often they are given away and new ones replace them within two or three yea

10、rs. This makes the problem worse. Computer recycling is thus common. Many projects try to send working computers to developing nations so they can be re-used and will not become waste as quickly. Computer jargon 计算机行话 Computer jargon means words to do with computers and surrounding topics. Knowing w

11、hat these words mean can help you know more about computers. Some people use these words to impress other people (Also known as buzzwords). Examples of jargon: Bit - The smallest data unit, can either be a “0.” or a “1.”. Byte - unit of data. See also Kilobyte, Megabyte, Gigabyte and Nibble CPU Cent

12、ral Processing Unit, Another name for processor Data - Information stored on a computer Disk - A place to store data. Email - Electronic mail. GHz - Gigahertz. Used often incorrectly to describe the speed of a processor. But with some 2.4 GHz processors faster than 3.6 GHz ones, it is clear that it

13、is just a salesman trick. Load - Get data from a disk Nibble - Half a Byte Save - Put data on a disk RAM random-access memory(随机存取存储器), the more the better. USB - Universal Serial Bus（通用串行总线，一种简化了插接多种附件的薄型插座） WWW - World Wide Web, part of the Internet Period2-3 Pre-reading & Reading Pre-reading This

14、 can be a continuation of the Warming UpLet the students discuss the questions set out in the Students Book1. Questioning and answering What do you know about computer? Electronic machine capable of performing calculations and other manipulations of various types of data, under the control of a stor

15、ed set of instructions. The machine itself is the hardware; the instructions are the program or software. Depending upon size, computers are called mainframes, minicomputers, and microcomputers. Microcomputers include desk-top and portable personal computers. A multi-function electronic device that

16、can execute instructions to perform a task. A device that accepts information, processes it, and supplies an output. A computer usually contains memory, a control unit, arithmetic and logical units, and a means for input and output. a programmable hardware component that is controlled by internally

17、stored programs and that can perform substantial computations (including arithmetic and logic operations) without human intervention. A computer typically consists of one or more processing units, memory units, and associated peripheral input and output devices. Related to automation and electronic

18、data processing. The Library of Congress commonly classes most computer-related books in HF5548, QA75-76, Z52, T385, and some TK ranges. a machine for performing calculations automatically calculator: an expert at calculation (or at operating calculating machines) A computer is a device or machine f

19、or making calculations or controlling operations that are expressible in numerical or logical terms. Computers are constructed from components that perform simple well-defined functions. The complex interactions of these components endow computers with the ability to process information. If correctl

20、y configured (usually by, programming) a computer can be made to represent some aspect of a problem or part of a system. If a computer configured in this way is give 2. Discussing and sharing How have computers changed our lives? Someday soon, if you havent already, youre likely to plug into the com

21、puter network nation growing in our midst. Computer terminals, or small computers connected via modem (a modulator/demodulator circuit for encoding/decoding computer chatter) to ordinary telephone lines, should be as ubiquitous as the telephone itself. Theyre a much more useful and humane tool than

22、the phone, and with corporate America behind them the networks will be everywhere-changing our lives more than any technology since the automobile. Joining a computer network is the same as joining a community. Small systems are like villages, where new members are formally welcomed. The larger netw

23、orks, the Source and CompuServe, for example, are cities-anonymous, full of life and events, but difficult to fit into. II. Reading This is the purpose of the reading and so it is important that the students learn to use all the clues in the text to help them understand the gist of what they are rea

24、dingSo encourage them to look at the pictures and the heading and guess what the text might be aboutThen ask the class to read the passage silentlyMake sure the students have the chronology of the development of computers in their mindsAsk them: 1. Listening and reading to the recording of the text

25、WHO AM I? Turn to page 18 and listen and read to the recording of the text. Pay attention to the pauses, pronunciation and intonation of the native reader. 2. Reading aloud and underlining expressions Now we are to read the text once again and underline all the expressions in the text. Put them down

26、 into your notebook after class as homework. Collocations from WHO AM I? begin as, a calculating machine, be built as, follow instructions from, sound simple, at the time, a technological revolution, write a book, makework, solve problems, become huge, had artificial intelligence, go back to, the si

27、ze of, go by, change size, become small and thin, get quick, stand there by oneself, be connected by, share information by, talk to, bringinto, deal with, communicate with, serve the human race 3. Reading, identifying and settling Attention, please! It is time to skim the text one more time and iden

28、tify the difficult sentences. Try analyzing the structures of the difficult sentences and discuss them among your group members. You may also put your questions to me for help. Chat （online）（在线）聊天 To chat is to talk about ordinary things that are not very important. You can chat to one person or to

29、many people. People also use this word now for parts of the Internet where we can talk with many different people at the same time. Usually, you chat on the internet in a chat room or messaging service like AOL(American On-Line) Instant Messenger (AIM), Yahoo Messenger, or MSN Messenger. IV. Closing

30、 down by doing comprehending exercises Turn to page 18 and in pairs do the comprehending exercises No. 1 and 2. Reading and transferring Scan the text for information to complete the table below, describing the development of computer. In 1642 In 1822 In 1936 In 1960s In 1970s Answer key: 1642: The

31、computer began as a calculating machine1822: The Analytical Machine wasmade by Charles Babbage1936: Alan Turing wrote a book to describe how computers could be made to work1960s: Computers had new transistors and became smaller1960s: The first family of computers connected to each other1970s: Comput

32、ers were brought into peoples homesNow: Computers connect people all over the world together V.Explanation1in common: for or by all of a group 共同的；共有的；共用的。in common 常常同have连用，如：have nothing in common 无共同之处have little in common 几乎无共同之处have something in common 有一些共同之处have a lot in common 有许多共同之处（1）You

33、 know, Dorothy, you and I have one thing in common（2）We just had nothing in common and I couldnt communicate with his dull business friends（3）I suddenly felt we had a lot in common2simple-minded: showing very little intelligence 头脑简单的；笨的。Richard is smart but he has a lot of simple-minded friendssimp

34、le-minded 是一个复合形容词，与它结构相同的复合形容词还有：absent-minded 心不在焉的 open-minded 虚心的，没有偏见的narrow-minded 心胸狭窄的single-minded 一心一意的strong-minded 意志坚强的weak-minded 低能的，愚蠢的3make a decision: make up ones mind 作出决定。与make a decision意思相近的词组有：arrive at / come to / reach a decision。与make连用的常用词组有：make an attempt, make an effor

35、t, make an offer, make a suggestion, make a phone call, make a mistake, make progress 等。4in a way: to a certain extent 在某种程度上。与in a way同义的词组有in one way 和in some ways。容易与之混淆的词组是in the way意为“造成阻碍”，请比较：In a way, I like this new textbook very much从某种程度上说，Im afraid your bike is in the way看来你的自行车挡着道了。5aft

36、er all1）in spite of what has been said, done or expected 毕竟；终究；归根结底。So youve come after all! 你终究还是来了！After all, what does it matter? 归根结底，那又有什么关系呢？2）it should be remembered 别忘了。She should have offered to pay shes a millionaire, after all6watch over: take care of 照料；照管。Could you watch over my dog whi

37、le I am on holiday? You go swimming, pleaseIll watch over the clothes here7wander（v.）: to move around in an area or go from place to place without any special purpose; roam 游荡；闲逛。He was wandering aimlessly up and down the roadHomework: Preview The Present Perfect Passive Voice Period 4: Learning abo

38、ut Language (The Present Perfect Passive Voice) Aims To learn to useThe Present Perfect Passive Voice To discover useful words and expression To discover useful structures Procedures I. Warming up by reading to the tape To begin with, turn to page 18, listening to and reading to the recording of the

39、 text WHO AM I? Attention goes to the pauses and intonation, as well as the pronunciation of the reader. II. Discovering useful words and expressions In pairs do the exercises 1, 2 and 3 on pages 19 and 20. You must finish them in 10 minutes. Discovering useful words and expressionsAnswer key for Ex

40、ercise 1: 1 totally 2 revolution 3 artificial intelligence 4 birth 5 simple-minded 6 go by 7 deal with 8 network 9 truly 10 anywayAnswer key for Exercise 2: revolution; network;went by; totally; truly; simple-minded; Anyway; deal with Answer key for Exercise 3: 1totally 2 amazed 3 exciting 4 excited

41、 5 cheaply 6 unluckyDiscovering useful structuresAnswer key for Exercise 1: 1. my family and I have been used by billions of people to deal with information . 2I have truly been built to serve the human race . Answer key for Exercise 2: 1A new personal computer has been bought by us2Many problems ha

42、ve been found with our new computer3A PC has been built the way we wanted4Our computer has just been joined to the Internet5The computer has been used every day by us since we bought it6A lot of e-mails have been written on the computer in the past yearIII. Learning about grammar 1. Passive VoiceOve

43、rview Tense or Model Passive Sentence Simple Present The TOEFL exam is given every six months. Simple past The TOEFL exam was given last month. Simple Future The TOEFL exam this year will be given on October15. Present Continuous The TOEFL exam is being given every year. Present perfect The TOEFL ex

44、am has been given every year since 1950. Past perfect The TOEFL exam had been given before the Vietnam War occurred. Simple Modal The TOEFL exam should be given to every Foreign student. Past Modal The TOEFL exam should have been given to all to enter US colleges. 2. The Present Perfect Passive Voic

45、e The structure of The Present Perfect Passive Voice is: have/ has beened IV. Reading aloud and discovering Now go back to page 18 to read aloud and discover in the text examples of The Present Perfect Passive Voice. As the years have gone by, I have been made smaller and smaller. Since then, my fam

46、ily and I have been used by billions of people to deal with information with each other around the world by the Internet. V. Discovering useful structure We shall do grammar exercises 1, 2 and 3 on page 20. VI. Closing down by doing a quiz Correct the mistakes in these passive voice sentences Exampl

47、e: The house was build in 1880. (correct = The house was built in 1880.) 1. 3000 employees were laying off. 2. A story will made up. 3. An idea was putted forward for discussion. 4. Has the book been give back to you yet? 5. My bank loan will be payed off in five years time. 6. Nothing can be hold a

48、gainst me. 7. Our allies will be lend support. 8. She has never heard of. 9. She was being knocked down by a bus. 10. She was letted off with a fine. 11. The candle was blow out by the draught. 12. The criminal were locked up. 13. The flood water was be kept back by barriers. 14. The inconvenience w

49、ill made up for by this money. 15. The keys must have been being left behind. 16. The old cinema is being pull down. 17. The protesters being held back by the police. 18. The road was blocking off. 19. Thirty more people were laid off last week. 20. Your jacket can be hanged up over there. Period 5:

50、 Using Language (ANDY THE ANDROID) Aims To discuss about IT To write a report about IT To read about androids or robots The purpose of this exercise is to encourage students to listen and then use what they have heard to help them fill in a chart about computersIt is an important exercise because it

51、 links skills together and uses them to produce a useful piece of writingMake sure the students look at the chart before they listen to the tapeThis is to sharpen their attention and listen for the answersThis will also help them get the gist of the textWhen filling in the chart, the students will h

52、ave to use their own experience as well as information from the listening textProcedures I. Warming up by talking about IT What is Information technology? Information technology (IT) or information and communication technology (ICT) is the technology required for information processing. In particula

53、r the use of electronic computers and computer software to convert, store, protect, process, transmit, and retrieve information from anywhere, anytime. II. Listening and writing Turn to page 21. Look at the pictures and listen to a conversation about different kinds of information technology or IT,

54、discuss and write down in groups the advantages and disadvantages of each kind. III. Speaking and writing The purpose of this exercise is to discuss together and then decide which kind of computer you would like to buy for your schoolThink about what the school needs as well as what you likeLet the

55、students do the exercise in pairs and share their ideas with othersFinally they should write the reportRemember to say which computer you have chosen and give a reasonYou should also say why you did not choose the other computersSuppose you and your partner are going to help choose computers for you

56、r school. Now talk about the special things each of the computer can do and write a report to your headmaster. IV. Reading, underlining and speaking This is a speaking activity about designing an androidThe purpose of the activity is not the design but the quality of the discussionSo try to make sur

57、e each pair makes a contribution to the finished designThen let them discuss their ideas with another pairPerhaps that will give each pair some more ideas for their androidFinally let students share their ideas with the classIt is said that computers could be put into androids or robots. Read the te

58、xt AndyThe Android, underlining all the expressions and think of the fun you could have! Expressions from AndyThe Android part of a football team, once a year, get together, play a football game, be asas, in fat, look like, on the football team, run fast, think like a human, shout to, in computer language, h