Unit3Computers全单元教案

1、Unit 3 ComputersI 教学内容分析 本单元的中心话题是“计算机” 。 Warming up 部分用图片呈现了计算机发展的历史，让学生通过看图讨论的方式了解计 算机的发展和演变过程。Reading 部分编者采用了拟人化的手法向读者介绍了计算机的发展历程。 Comprehending 部分包括三个练习，分别从事实层面、分析层面和拓展层面考察学生 对文章的理解和运用情况。Learning about language 部分的活动突出了形容词和副词用法的区别，并扣本单元的语法点(现在完成时的被动语态) 。Using language 部分的听力材料中谈论的是信息技术的几种形态或载体(包括

2、收音机、书籍、电视和电脑；在读说活动中，通过智能机器人参加足球赛的经历向读者介绍了计算 机运用的另外一个例子。Learning Tip 部分鼓励学生利用图书馆，网络等课外资源学习英语，有利于学生使用 资源策略。Reading for Fun 部分是一首活泼风趣的小诗，以拟人的方法让机器人自述了心声：尽 管日夜忙碌，为人服务，但它相信自己和真实的人类没什么两样。II 教学重点和难点 1教学重点(1) 本单元的生词和短语；(2) 通过学习本单元，使学生了解计算机的发展历程，及其在当今社会的广泛运用；(3) 鼓励学生用英语表达自己的观点，进行简单的推理和做出决定。 2教学难点(1) 教会学生通过时间

3、的先后顺序来表达一件事；(2) 使学生了和掌握现在完成时的被动语态的用法；(3) 指导学生按类别归纳整理词汇，让学生学会有效地记忆词汇的方法；(4) 引导学生发现本单元重点语言结构，让学生自己发现并感悟相关的语言规律，在 学习过程中培养语感。III 教学计划 本单元分六课时： 第一课时： Warming Up, Pre-reading, Reading 第二课时 ：Language points 第三课时： Learning about language 第五课时： Speaking, Reading,WritingIV 教学步骤：Period 1 Warming Up, Pre-readin

4、g, ReadingTeaching Goals:1. To know someth ing about computers.2. To lear n and talk about computers.Teaching Procedures:Step 1. Leading-inPurpose: To activate the Ss and arouse them to talk about the importanee of computers in moder nsociety.Ask Ss whether they have a computer or not and what they

5、use it for. Let them talk as much aspossible.Step 2. Warming UpPurpose: To get Ss to think about the differe nt ways computers can be made.Pair workGet Ss to look at the follow ing pictures, and the n ask them to an swer the questi ons.A PCA no tebook computerA calculatorA huge computerAn abacus1. W

6、hat are they?2. What do they have in common?3. What is a computer?Suggested Answers:1.a huge computer, a personal computer, a notebook computer, a calculator, an abacus2.(1) to be used to calculate;(2) operate by human beings;(3) they are all artificial;(4) show figures in a certain way.3.A computer

7、 is a machine which stores knowledge in its memory and does calculations on thatknowledge. This knowledge is stored in symbols; it is called data. A computer usually has amonitor to show results. However, some computers can speak; these computers can be used forvoice mail.A computer is now almost al

8、ways an electronic device. It usually contains materials which aretoxic; these materials will become toxic waste when disposed of. When a new computer ispurchased in some places, laws require that the cost of its waste management must also be paidfor. This is called product stewardship.Step 3. Pre-r

9、eadingPurpose: To activate Ssinterest about computers.Group workAsk Ss the following questions and encourage them to say more.1.How have computers changed our lives ?2.What do you know about computers ?Suggested Answers:1. They re a much more useful and humane tool than the phone , and with corporat

10、e Americabehind them the networks will be everywhere- changing our lives more than any technology sincethe automobile.2. A multi-function electronic device that can execute instructions to perform a task.A device that accepts information, processes it, and supplies an output. A computer usuallyconta

11、ins memory, a control unit, arithmetic and logical units, and a means for input and output.A programmable hardware component that is controlled by internally stored programs and thatcan perform substantial computations (including arithmetic and logic operations) without humanintervention. A computer

12、 typically consists of one or more processing units, memory units, andassociated peripheral input and output devices.Step 4. Reading1. SkimmingPurpose: 1. To get a brief understanding of the text.2. To train the studentslistening ability.First, let Ss skim the text and then listen to the recording o

13、f the text. Pay attention to the pauses andpronunciation.2. ScanningPurpose: To get Ss to have some details in the text.Now we are to read the text again and underline all the expressions in the text. Write themdown in your notebook.3. Further ReadingPurpose: To get Ss to get more details about the

14、text.Read the text again and find the information to complete the table, which describes thedevelopment of computer.1642: _1822: The Analytical Machine was made by Charles Babbage.1940s: _: The first family of computers was connected to each other.1970s: _Now: _Step 5. RetellPurpose: To have a deep

15、understanding of the text.Ask Ss to use the chart above to retell the development of the computer.One possible version:I, a computer, was a calculating machine in 1642 in France. Then I was built as an Analytical Machinein 1822, which was a technological revolution. I became a “universal machine ”in

16、 1936 to solve anymathematical problem. I was not very big at first then I became huge, the size of a large room beforeI was made smaller and smaller.Getting new transistors, later very small chips I changed my shape. I was connected with othercomputers and turned out to part of a network in the ear

17、ly 1960s. In 1970s I was brought into peoples homes, and came the Internet.Step 6. Homework1. Write a short passage about the development of computers.2. Finish Ex1 (P19), Ex2 (P20).Period 2 Language pointsStep 1 Word studyGroup workDivide Ss into four groups and ask them to discuss the following wo

18、rds.1. common( 1 ) most widely known; ordinary:Eg He is a common sailor.( 2 ) have nothing/little/something/ a lot in commonEg At first, I think we only had one thing in common, but suddenly I felt we had a lot incommon.Eg The two brothers had everything in common in their manners, but the two siste

19、rs havelittle in common.Eg They have nothing in common with one another.2. analytical 分析的Eg The scientist analyzed the milk and found it contained too much water.3.technology 科技；技术Eg With the development of technology, we will cure AIDS sooner or later.4.calculate(v.)1) to use numbers to find out a

20、total amount, distance, etc. 计算； 核算 We havent really calculatedthe cost of the vacation yet.2) to guess sth by using all the information available 推测，估计 It is impossible to calculate whatinfluence he had on her life.5.As time went by, I was made smaller. 随着时间的推移，我被弄得越来越小。 go by : to pass 逝去，过去Things

21、 will get easier as time goes by. 随着时间的推移，情况会有所改善。6.totally:completely 完全地； 全部地； 整个地They come from totally different cultures. 他们来自完全不同的文化。7. share with: to have or use sth at the same time as sb else 共用，合用 Mary shares a house withthree other students. 玛丽和另外三个学生合住一间房子。 Share in 分享，分担8.explore (v.)1)

22、to travel to or around an area or a country in order to learn about it 勘察； 探索； 考察 The cityis best explored on foot. 最好是徒步考察这个城市。2) examine sth completely or carefully in order to find out more about it. 探究，调查研究 Theseideas will be explored in more detail in Chapter 7. 这些想法将在第七章里作更详细 地探讨。9.in a way: t

23、o a certain extent 在某种程度上In a way you are right, but this new textbook is too boring. 从某种程度上说你是对的，但是 这本新教材是很枯躁的。In the way 阻碍，妨碍Step 2. HomeworkUse the words above to make sentences and check them with your partner.Period 3 Learning about LanguageStep 1. Learning about Language1. Fill the blanks and

24、 check the answers altogether.(1) Snow is _( 常见的 ) in cold countries.(2)_. Can you( 估计 )the cost of this journey?(3)_. The( 分析 ) of the samples on the murder spot showed some valuablecluesto the police.(4) I shall go and see him _( 无论如何 )(5) He s some kind of _(数学 )genius.(6)_ . He is too s to work

25、out such a difficult problem.(7)_ . He asked his father s oabout his plans.(8)_ . How are you going to dwith the letter?(9)_ . I( 完全 ) agree to your plan.(10)_ . This is a tbeautiful picture.2. Change the following sentences with the meaning not changed.(1) I like a lot of what she likes.We have a l

26、ot_ _ .(2)Harry helped me with my English, so I learnt a lot.I made great progress in English_ Harry s _ .(3) Time passed quickly. Peter grew into a tall young man.With the time _ _ , Peter became a tall young man.(4) You said it was very special. I don t think so.I_ with what you said.(5) In my opi

27、nion, Mickey is the kind of pers on we n eed., Mickey is the very man we need.3.GrammarPurpose: To get Ss to have knowledge of this grammar point: present perfect passive voice.(1) Presentation1Revise the grammar: the present passive voice.am / is / are + done2Revise the grammar: the present perfect

28、 voice.Have/has + done3Explain the grammar: the present perfect passive voice. Have/has been +done(2) PracticePurpose: To get Ss to have knowledge of the grammar through exercise. Fill the blanks with the correct tense.A. -The window is dirty.It _ _ (not clean) for weeks.B. -George and Lucy got marr

29、ied last week. Did they have a big wedding?-No, I _ (not invite).Did they have a big wedding?.C. -Have you moved to your new apartment?-Not yet, it _ (paint) at the moment.D. too much. The students have been made _ (not play) computer games E.Since the n, all differe nt kinds of in formati on_( 处理)b

30、ycomputers.F.He doesn mind the story_ (编造)in this way.G.Do you know how many websites there are _ (连接)?Suggested Answers:A. has n t bee n clea nedB. had n t bee n in vited C. is being pain ted D. not to play E. has bee ndealt with F. being made up G. to be conn ecte Translating following sentences i

31、nto Chinese and pay attention to the present passive voice.A. A new pers onal computer has bee n bought.B. Many problems ahs bee n found with our new computer.C. A PC has bee n built the way we wan ted.D. Our computer has just join ted to the Intern et.E. The computer ahs bee n used every day since

32、we bought it.F. A lot of e-mails have been written on the computer in the past year.Step 2. HomeworkFi nish Ex1 (P21), Ex2 (P21) and Ex3 (P21).Period 4 ListeningTo train Ss to make a summary.2. Listen to the tape3. Listening task (Workbook P58)Step 1. Listening (Using Language)Step 1. Speaking1. Gro

33、up workGet two Ss to be a group and tell each group do as follows. Then let some of the groups prese nt theirreports.You and your partner have been asked to help choose computers for your school. You have looked atseveral computers. Talk about the special things each computer can do. Make a decisi o

34、n aboutwhich kind of computer to buy and expla in why. Write a report about your choice. Then read yourreport to ano ther group as if they are a teacher or the headmaster. Below is a list of thi ngs yourcomputer could have. Try to use the prese nt perfect passive voice in your report.A faster PCthe

35、mon itor is smallerImproved disc storageused recycled materialsInterneta flat scree n2. Individual workSuppose every student have a chanee to get a computer and they can choose any kind of computer.Let them think about the reas ons they choose the computer. The n ask them to prese nt their reasons.S

36、tep 2. Reading (Using Language)Purpose: To train Ss reading ability.1. Liste n to the tape and get the main idea of the passage.2. read the passage carefully and ask Ss to an swer the follow ing questi ons.(1) What does he act as on the team?(2) What helped him to move and think?(3) Why does he thin

37、k the team who won the first place cheated?Suggested Answers:(1) On the team, Im a striker, so I can run very fast.(2) My computer chips help me to move and think like a human.(3) Because they had a new kind of program, which had just been developed before the competition.Step 3. WritingOne possible

38、 version:Hello everybody, my n ame is Liu Yan. I am a 321 model an droid. I work for the Li family and I lookafter their library. My job is to store all the books that they borrow from their school or friends in mybrai n. Of course my brain is as large as a mou ntai n so work like that is no trouble

39、 to me. I really eatbooks just like people eat food.The Lis have a child who n eeds me to remember all his school textbooks so I can do hishomework for him. He just gives me the information on the subject, what has to be done and the pagenumbers and I get on with it while he enjoys himself with his

40、friends. Sometimes I dontthink it is right to do his homework for him its somewhat cheating. However, his parents are veryconcerned at the pressure of work in school these days. The child has too much homework to do.They like him to go to the key school but they also want him to be able to have hobb

41、ies, learn to swimand keep fit! Poor child!Mr and Mrs Li work very hard too. Mr Li is an architect and designs great tall apartment blocks. Mrs Liis a doctor and has to look after many patients. I remember all the plans for Mr Li s projects and cantell Mrs Li which drugs are the best to give any par

42、ticular patient. Mrs Li no longer has to read all thosemedical journals because I can do it for her. She and her husband have sometime together to enjoylife too.So they consider me the most important person in the family after themselves. I am alwaysintroduced to their friends and play with visiting

43、 children. I am the perfect family academic aid and,although I was not cheap to buy, Mr Li says I was worth every yuan!2. HomeworkNow computer games become more and more popular among students. Write an article on this topicto show their views.One possible version:Computer GamesTheres a famous sayin

44、g, Everything has two sides, the ad-vantages and disadvantages. Computer games are no exception. In its development computer games have brought bothadvantages and disadvantages.Now, heres an example: A racecar game Need For Speed III is absolutely a fantasticgame. Imagine this: You sit in-front of t

45、he screen with wheels in your hands and eyes fixed on thescreen. You can feel the powerful roaring of the 3600ml engine from Porsche 911 Turbo as you driveup to 290km/h without any real danger. You can also hear the wheels screaming as a sharp turn wasbeing made. And if you have a 3Dfx card you can

46、really feel what is realistic. The road, the raindrops,the snowflakes and other racecars seem as real, which give us a great pleasure and satisfaction.Apart from it, they can train us to respond to things quickly. Moreover, computer games can stimulateour imagination and interest in electronics and

47、computer sciences. On the other hand, computergames also have its disadvantages. First, it is harmful to our eyes and health, which is one of the mostserious disadvantages about computer games. And sec-only, we are still middle school students,playing games is not our destination. If we play games too much, we may forget those things that weshould do, because we lack the ability to control