必修二 Unit3 Computers 教案和教学反思

【精品文档】如有侵权，请联系网站删除，仅供学习与交流必修二 Unit3 Computers 教案和教学反思.精品文档.高一英语 陈花Unit 3 Computers Period 1&2, Warming Up, Pre-reading, and ReadingTeaching aims 1. Knowledge aims(1) Get the students to learn the useful and expressions in this part.(2) Let students to learn about history and basic knowledge of computers.1. Ability aimsDevelop students reading abilities and let them learn different reading skills.3. Emotion aims :Arouse students great interest in learning computers and let them learn to use the computers in their daily lives.Teaching difficult and important points1. Let the students learn more about history and basic knowledge of computers.2. Get the students to learn different reading skills.Teaching methods1. Task-based teaching and learning2. Cooperative learning3. Discussion Teaching procedures and ways Step1.Warming up Task1: How much do you know about computers? (Make a survey) 1. What does IT mean?Information technology2. How to speak 科学技术 in English?Science and technology3. What does PC mean?Personal computer4. How to speak 人工智能 in English?Artificial intelligence 5. What does PDA mean?Personal digital assistant 6.How to speak 笔记本电脑 in English?Notebook computer/ laptop7. What does W.W.W mean?World wide web8. What can computers be used to do in our daily life?Task2: What is it? Give some sentences to describe different kinds of calculating objects and some pictures to help the students to guess what it is? An old calculating machine used in China until now.An abacus It is a new calculating machine which can solve a large number of mathematical problems.A calculator It is built to solve some mathematical problems. But it is too big. A huge computer It is a computer which can solve all kinds of problems and is used widely now .A PC / desktop It is a kind of computer which can be taken conveniently(方便).A laptop / notebook computerStep2.pre-reading Can you put these inventions in an order according to the time when they appeared?( ) Analytical machine（分析机）( ) Laptop( ) Calculating machine （计算机器）( ) Robotandroid( ) PC( ) Universal machine（通用机器）Step3. Reading (1) SkimmingTask 1. Find out the topic sentences of each paragraph (P19.Ex2)Task 2 .Summarize the general idea of this passage.(2) ScanningTask1. True or False1. In 1642 I began as a calculating machine and could solve any mathematical problem. (F: solve any calculating problem)2. My real father was Charles Babbage, who wrote a book and build me in 1936.(F: Alan Turning)3. After I got my new transistors in the 1960s, I became smaller but cleverer and quicker.(T)4. I was brought into peoples homes in the 1970s.(T)5. Since my birth I have been built to take the place of human race.(F: build to serve human race) (3)Careful- readingTask 1: Look at the timeline below. Fill in the blanks with information from the reading text.TimeThe development of the computers16421822The Analytical Machine was made by Charles Babbage.1940sThe first family of computers was connected to each other. 1970snow1642: The computer began as a calculating machine1822: The Analytical Machine was made by Charles Babbage.1936: The computer grew rapidly both in size and in brainpower.1940s: The computers had grown as large as a room.1960s: The first family of computers was connected to each other. 1970s: Computers were used in offices and homesNow: Computers connect people all over the world together.Step4. Conclusion of the text How did computers develop? A calculating machine _ _ _ many new applications Period 3 Vocabulary and Useful ExpressionsLearning aimsGet the Ss to master some important words :common, solve, arise, signal and phrases: with the help of, as a result, in a way, deal withObjectives of process and methodCooperative learning and discussion and presentation Important and difficult pointLearn the usage of some important words: common, solve, arise, signal.Step1. Important words1. common adj.共同的；普通的；常见的 have something/much in common 有一些/很多共同之处 have nothing/ little in common 没有共同之处1) They are friends, for they _.他们是好朋友，因为他们有很多共同之处。2) We _those bad students.我们和那些不好的学生毫无共同之处。arise vi.出现；发生；起身，起床 arise from 由引起1) 作“呈现；出现；发生”之意时，主语多为抽象名词argument/problem/question等Youhaveoneidea,theyhaveanother, andproblems_. 你有一个主意，他们也有一个，问题出现了。2) It cant be too careful while driving. Accidents often carelessness.开车时越仔细越好，事故往往是由疏忽大意而引起的3. signal vi. & vt.发信号；示意 n.信号1) The police _ the driver to stop his car by raising his hand.警察举手示意司机停车。2) He signaled (to) her to keep away. 他示意她不要靠近。3) In the remote country area，we often fail to receive strong (手机信号)用法总结_.Step2 Important expressions1. as a result 结果（作状语）1) As a result I totally changed my shape. 结果我的形象完全改变了。2) She died as a result of her injuries. 她由于受伤而死亡。用法总结：as a result 表示_ as a result of 表示_， 相当于because of, 只能连接_/_/_及what引导的宾语从句。1) , he got a good score in the exam结果他在那次考试中取得了一个好成绩。2) Mandela died his lung disease. 曼德拉由于肺部疾病而死亡。2. in a way 在某种程度上，从某一点看 (= in one/ some way)In a way, our programmer is like our coach. 从某种程度上说，我们的程序员就好比是我们的教练。1) , it was one of my biggest mistakes.从某种意义上来说，这是我所犯的最大错误。2) in this way in no way in the/ sbs way by the way 3. 在Tom 的帮助下，我解决了这个问题。With the help of Tom, I solved the problem. With Toms help, I solved the problem.用法总结_.deal with处理；安排；对付我不知道如何处理这种情况。1) I dont know how to deal with the situation.2) I dont know what to do with the situation.用法总结: deal with常与_连用，而do with则常与_连用。Step3句型突破1.As time went by，I was made smaller.一年年过去，我被做得更小了。 as意为“随着”，引导时间状语从句。1) As time went on，his knowledge broadened. 随着时间的推移，他的知识面变宽了。2) With the time going by，they became close friends.随着时间的流逝，他们变成了好朋友。辨析：as与with(1) as是_词，引导_。(2)with是_词，后接_词或_词构成with短语或with复合结构。_/ _，the city became more beautiful.随着时间流逝，这座城市变得更美丽了。2. And my memory became so large that even I couldnt believe it.我的存储量变得如此之大，甚至连我自己都不能相信so.that.,such.that两者都可引导结果状语从句，表示“_”，区别在于so是副词，后面要跟_词或_ 词，而such是形容词，只能修饰_ 词。但如果名词前有“many, much, little, few”修饰时，这时不用such而用so.1）The problem difficult that nobody can work it out. 这道题太难，没有一个人能解出来。2）It was hot a day that nobody wanted to do anything.(It was a hot day that nobody wanted to do anything.) 天气如此热，谁也不想干活。3）I made many mistakes in the composition that the teacher criticized me. 我的作文中出了许多错误，老师批评了我。4) It is lovely weather that we all want to go out for a walk.5) It is a lovely day that we all want to go out for a walk.天气那么好，我们都想出去散步。当堂检测 1You look so worried. Whats the matter?I dont know _（如何处理） these boring problems.2.George was responsible for the accident because he didnt _（发信号） to other drivers.3. New social problems have _(由产生) the unfair distribution of the social wealth.4.Jenny nearly missed the flight （由于的原因）doing too much shopping.5.He reads English every morning，_(以这种方式) he has had his English greatly improved.6. _(在某种程度上) I can see what you mean，but I cant share your point of view.7. The Great Wall is （如此著名）tourist attraction that millions of people pour in every year.8_（随着孩子们的长大） ，they become more and more interested in the things around them.Period 4 Grammar and Useful ExpressionsTeaching IntroductionThis is the fourth teaching period of this unit. To test whether students have grasped the important and difficult language points they learned in the last period, the teacher should first offer some revision exercises. The Pattern “And my memory become so large that I couldnt believe it.” is a bit important, so special exercise should be designed.This teaching period mainly deals with the grammar: the present perfect passive voice. Firstly, the teacher can ask students to read the reading passage again, tick out the sentences in the present perfect passive voice from the reading passage and translate them into Chinese. Secondly, compare and discover the structure and usages of the present perfect passive voice by giving a lot of example sentences. Thirdly, do the exercises in Discovering useful structures on page 21 and more exercises for students to master the present perfect passive voice. Finally, summarize the present perfect passive voice.Teaching goals: Knowledge goals 1. Get students to know the structure of the present perfect passive voice.2. Let students learn the usages of the present perfect passive voice. Ability goalsEnable students to use the present perfect passive voice correctly and properly. Emotion goals1. Get students to become interested in grammar learning.2. Develop students sense of group cooperation.Teaching important pointsGet students to master the structures and usages of the present perfect passive voice.Teaching difficult pointsEnable students to learn how to use the present perfect passive voice correctly.Teaching methods1. Task-based teaching and learning2. Cooperative learning and practiceTeaching process Step 1 Revision ( 5 minutes)1. Check the homework exercises.2. Dictate some new words and expressions.3. Translate the sentences into English:1) 他太聪明了，大家都喜欢他。2) 他是一个如此聪明的男孩，以致于大家都喜欢他。3) 他取得如此大的进步，以致于老师们都对他很满意。4) 他出了太多的差错，所以考试失败了。Suggested answers:1) He is so clever that everybody likes him.2) He is such a clever boy that everybody likes him.3) He made such great progress that the teachers were pleased with him.4) He made so many mistakes that I failed the exam.Step 2 Grammar revision ( 8 minutes)1. Review the passive voice 1) 被动语态的结构：be + p.p.2) 一般现在时被动语态的结构：am/is/are (not)+p.p.3) 一般过去时被动语态的结构：was/were (not)+p.p.4）含有情态动词被动语态的结构：can/could/may/might/will/would/shall/should/must/need(not)+be + p.p.5）一般将来时被动语态的结构：will (not)/be (not) to+ be+ p.p. 2. Fill in the blank with the right form of the verb given.1) Running races (hold) on the playground yesterday.2) Food (serve) between 12:00 and 14:00 every day.3) Nobody can (allow) to enter the stadium without a ticket.4) Whoever breaks the law, he (punish).Suggested answers:1) were held 2) is served 3) will be allowed 4) will be punished Step 3 Grammar learning ( 15 minutes)1. DiscoveringAsk students to look at the exercises 1 on page 21. Look at the following sentence, paying attention to the underlined part.EXAMPLE: Over time I have been changed a lot. Ask students to go back to page 18 to read the passage Who am I ?, let them pick out the sentences in the present perfect passive voice and translate them into Chinese.Suggest answers:1) Over time I have been changed quite a lot.随着时间的逝，我已经被改变了许多。2) I have been used in offices and homes since the 1970s.自从20世纪70年代以来，我已经被应用于办公室和家庭。3) I never forget anything I have been told.我从来不会忘记告诉我的任何事情。4) Since the 1970s many new applications have been found for me.自从20世纪70年代以来，许多新的用途已经为我开发出来。5) I have also been put into robots and used to make mobilephones我也已经被装入机器人体内，并应用于制造移动电话6) I have even been put into space rockets我甚至已经被装入太空火箭2ThinkingLet students look at the tense used in the sentences they picked out and think over this question: What is the structure of the present perfect passive voice?3. Summing upThe structure of the present perfect passive voice is “have/has+ been + p.p.”. It is a combination of the present perfect tense (have/has + done) and the passive voice (be + p.p.).Ask students to turn to page 87 and look at the chart of the present perfect passive voice.现在完成时的被动语态的构成（以动词ask为例）肯定式否定式疑问式I havebeen askedYou have He/She/It hasWe haveYou have They haveI havenot been askedYou have He/She/It hasWe haveYou have They have Have I Have you been asked?Has he/she/itHave weHave yourHave they Step 4 Grammar practice ( 12 minutes)Ask students to finish the exercise 2 and 3 on page 21.Exercise 2 Change the following sentences into the present passive voice.1. My friend has bought a new personal computer.2. The shop has repaired my computer very quickly.3. An unknown virus has just attacked my computer.4. We have not solved the problem yet.5. The company has given its computers away to a local school.6. The scientists have developed a kind of intelligent robot.Suggested answers:1. A new personal computer has been bought by my friend.2. My computer has been repaired by the shop very quickly.3. My computer had just been attacked by an unknown virus.4. The problem has not been solved by us yet.5. Its computers have been given away to a local school by the company.6. A kind of intelligent robot has been developed by the scientists.Exercise 3 1. Underline the use of the present perfect passive voice in the following poem. Then fill in the chart below.Look at the way your face has been washedLook at the way your hair has been combed Look at the way your shoes have been cleanedYoud better do them again.Look at the way the flowers have been planted Look at the way the grass has been cutLook at the way the paths have been sweptI hope that youll come here again.Things that have been done wellThings that have been done badlySuggested answers:Look at the way your face has been washedLook at the way your hair has been combed Look at the way your shoes have been cleanedYoud better do them again.Look at the way the flowers have been planted Look at the way the grass has been cutLook at the way the paths have been sweptI hope that youll come here again.Things that have been done wellThings that have been done badly the way the flowers have been planted the way the grass has been cut the way the paths have been sweptthe way your face has been washed the way your hair has been combed the way your shoes have been cleaned2. Read this poem aloud, paying attention to the rhythm and intonation. Then write your own poem.Look at the way Look at the way Look at the way Look at the way Look at the way Look at the way The answer is varies.Step 5 Consolidation ( 2 minutes)Ask the students to close their books, and then recall what have learned in this class.Step 6 Homework ( 3 minutes)1. Finish the workbook exercises on page 57.2. Finish the exercise as follow and hand it in the next day.3. Preview the passage Andy-The Android on page 23, find the sentences in which the present perfect passive voice has been used and see if you can put it into the active voice.Turn these sentences into the present perfect passive voice 1. We have made a plan.2. He has fixed the computer.3. We have bought a new personal computer.4. We have found many problems with our new computer.5. They have built a PC the way we wanted.6. They have just joined our computer to the Internet.7. We have used the computer every day since we bought it.8. We have written a lot of e-mails on the computer in the past years.Suggested answers:1. A plan has been made by us.2. The computer has been fixed by him.3. A new personal computer has been bought by us.4. Many problems have been found with our new computer by us.5. A PC has been built the way we wanted.6. Our computer has just been joined to the Internet by us.7. The computer has been used by us since we bought it.8. A lot of e-mails have been written by us on the computer in the past years.Teaching experience: Because the students have some knowledge about the passive voice, most students can accept and master the present perfect passive voice after revision, discovery, analyzing, exercise and summing up. Receive good results.Period 5 Listening, Speaking GOALS:1. To practise listening comprehension.2.To practise making decisions and reasoningTEACHING PROCEDURES:Step1. revision1. check the homework exercises.1). It has been reported that children will be offered free educationIt has been reported that free education will be offered to children2). It has been said that we will be offered the latest computer science course bookIt has been planned that the latest computer science course book will be offered to us3). I have been told by Peter that I will be lent his notebook computer for a weekI have been told by Peter that his notebook computer will be lent to me for a week2. Question: What can computers be used as? Step2. Lead-in As we know, science and technology is developing very fast and computers have become smaller and smaller. They have been used in many fields. So, the 21st century is the century of information technology What does it mean? Does information technology/ IT only mean things like computers? Of course not. Actually, it means more than computers. Computers are just one kind of IT. What else do you know is part of IT?(TV, radio, CD-ROM, DVD, books) Step3. Listening (SB) 1. Pre-listening: What are the changes brought by different forms of IT ? What are the advantages and disadvantages of them ? 2. While-listening:Go through the chart and make sure the students look at the chart before they listen to the tape. (This is to sharpen their attention and listen for the answers. This will also help them get the gist of the text.) Then Listen to the tape and finish filling in the chart. (If necessary, play the tape for several times.)Say: After listening to their talk, we know all kinds of IT have both disadvantages and advantagesLets check the answers together.Type of ITAdvantagesDisadvantagesTVYou can both listen and watchYou cannot write to friendsWebYou can find informationIt is very expensiveRadioYou can listen to EnglishYou cannot watch a filmBookYou can get informationSometimes it is out of date3. Post-listening: 1) (pair work): Decide which type of IT is best for you to use right now. Make your choice and give your reasons by using the following expressions. I think that. In my opinion, . I believe that. I agree because. I disagree because. Ive decided that. 2) (group work): Discussion : Computers are useful and have brought us lots of good things, but they also cause bad effects. What attitude should we have towards the computer? (Make good use of it but never get trapped by it.)Step4. Speaking1. Pre-speakingSay: From what we have learned, we should admit that computers and the web have a great influence on the school education as well as peoples life. It has come into peoples everyday life and many families hold computers in their homes. Now there is a task for you.2. While-speaking1) Situation: You have been asked by your parents to help choose computers for your home. You and your friend have looked at several computers. Talk about the special things each computer can do. Make a decision about which kind of computer to buy and explain why.Inform