必修二 Unit3 Computers 教案和教學(xué)反思

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1、【精品文檔】如有侵權(quán)，請聯(lián)系網(wǎng)站刪除，僅供學(xué)習(xí)與交流 必修二 Unit3 Computers 教案和教學(xué)反思 .....精品文檔...... 高一英語 陳花 Unit 3 Computers Period 1&2, Warming Up, Pre-reading, and Reading Teaching aims 1. Knowledge aims (1) Get the students to learn the useful and expressions in this part. (2) Let students to l

2、earn about history and basic knowledge of computers. 1. Ability aims Develop 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 di

3、fficult and important points 1. Let the students learn more about history and basic knowledge of computers. 2. Get the students to learn different reading skills. Teaching methods 1. Task-based teaching and learning 2. Cooperative learning 3. Discussion Teaching procedures and ways Step1.W

4、arming up Task1: How much do you know about computers? (Make a survey) 1. What does IT mean? Information technology 2. How to speak 科學(xué)技術(shù) in English? Science and technology 3. What does PC mean? Personal computer? 4. How to speak 人工智能 in English? Artificial intelligence ? 5. What do

5、es PDA mean? ?Personal digital assistant 6.How to speak 筆記本電腦 in English? Notebook computer/ laptop? 7. What does W.W.W mean? World wide web 8. What can computers be used to do in our daily life? …… Task2: What is it? Give some sentences to describe different kinds of calculating object

6、s and some pictures to help the students to guess what it is? ① An old calculating machine used in China until now. An abacus ② It is a new calculating machine which can solve a large number of mathematical problems. A calculator ③ It is built to solve some mathematical problems. But it is to

7、o big. A huge computer ④ It is a computer which can solve all kinds of problems and is used widely now . A PC / desktop ⑤ It is a kind of computer which can be taken conveniently(方便). A laptop / notebook computer Step2.pre-reading Can you put these inventions in an order according to the

8、time when they appeared? ( ) Analytical machine（分析機） ( ) Laptop ( ) Calculating machine （計算機器） ( ) Robot／android ( ) PC ( ) Universal machine（通用機器） Step3. Reading (1) Skimming Task 1. Find out the topic sentences of each paragraph (P19.Ex2) Task 2 .Summarize the g

9、eneral idea of this passage. (2) Scanning Task1. True or False 1. 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 m

10、y new transistors in the 1960s, I became smaller but cleverer and quicker.(T) 4. I was brought into people's 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- reading Task 1: Look at the timeline below. Fill in

11、the blanks with information from the reading text. Time The development of the computers 1642 1822 The Analytical Machine was made by Charles Babbage. 1940s The first family of computers was connected to each other. 1970s now 1642: The computer began as a calculating machine

12、 1822: 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 homes Now:

13、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

14、 Vocabulary and Useful Expressions Learning aims Get the Ss to master some important words :common, solve, arise, signal and phrases: with the help of, as a result, in a way, deal with Objectives of process and method Cooperative learning and discussion and presentation Important and difficult

15、 point Learn the usage of some important words: common, solve, arise, signal. Step1. Important words 1. common adj.共同的；普通的；常見的 have something/much in common 有一些/很多共同之處 have nothing/ little in common 沒有共同之處 1) They are friends, for they _________________________________________. 他們是好朋友，因為他們有

16、很多共同之處。 2) We ____________________________________those bad students. 我們和那些不好的學(xué)生毫無共同之處。 arise vi.出現(xiàn)；發(fā)生；起身，起床 arise from 由……引起 1) 作“呈現(xiàn)；出現(xiàn)；發(fā)生”之意時，主語多為抽象名詞argument/problem/question等 You?have?one?idea,?they?have?another, and?problems_______.?? 你有一個主意，他們也有一個，問題出現(xiàn)了。 2) It can’t be too careful

17、 while driving. Accidents often carelessness. 開車時越仔細越好，事故往往是由疏忽大意而引起的 3. signal vi. & vt.發(fā)信號；示意 n.信號 1) The police _________ the driver to stop his car by raising his hand.警察舉手示意司機停車。 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 rece

18、ive strong (手機信號)． 用法總結(jié)_____________________________________________________________. Step2 Important expressions 1. as a result 結(jié)果（作狀語） 1) As a result I totally changed my shape. 結(jié)果我的形象完全改變了。 2) She died as a result of her injuries. 她由于受傷而死亡。 用法總結(jié)：as a result 表示_________ a

19、s a result of 表示____________， 相當于because of, 只能連接______/______/_______及what引導(dǎo)的賓語從句。 1) , he got a good score in the exam結(jié)果他在那次考試中取得了一個好成績。 2) Mandela died his lung disease. 曼德拉由于肺部疾病而死亡。 2. in a way 在某種程度上，從某一點看 (= in one/ some way) In a way, our programmer is li

20、ke our coach. 從某種程度上說，我們的程序員就好比是我們的教練。 1) , it was one of my biggest mistakes.從某種意義上來說，這是我所犯的最大錯誤。 2) in this way in no way in the/ sb’s way by the way 3. 在Tom 的幫助下，我解決了這個問題。 With the help of Tom, I

21、solved the problem. With Tom’s help, I solved the problem. 用法總結(jié)________________________________________________________. deal with處理；安排；對付 我不知道如何處理這種情況。 1) I don’t know how to deal with the situation. 2) I don’t know what to do with the situation. 用法總結(jié): deal with常與______連用，而do with則常與______

22、___連用。 Step3句型突破 1.As time went by，I was made smaller. 一年年過去，我被做得更小了。 as意為“隨著”，引導(dǎo)時間狀語從句。 1) As time went on，his knowledge broadened. 隨著時間的推移，他的知識面變寬了。 2) With the time going by，they became close friends.隨著時間的流逝，他們變成了好朋友。 辨析：as與with (1) as是___詞，引導(dǎo)__________________。 (2)with是_____詞，后接____詞或_

23、____詞構(gòu)成with短語或with復(fù)合結(jié)構(gòu)。 ___________________/ ____________________________，the city became more beautiful. 隨著時間流逝，這座城市變得更美麗了。 2. And my memory became so large that even I couldn’t believe it. 我的存儲量變得如此之大，甚至連我自己都不能相信 so...that...,such...that兩者都可引導(dǎo)結(jié)果狀語從句，表示“_____________”，區(qū)別在于so是副詞，后面要跟___詞或___ 詞，

24、而such是形容詞，只能修飾____ 詞。但如果名詞前有“many, much, little, few”修飾時，這時不用such而用so. 1）The problem difficult that nobody can work it out. 這道題太難，沒有一個人能解出來。 2）It was hot a day that nobody wanted to do anything.(＝It was a hot day that nobody wanted to do anything.) 天氣如此熱，誰也不想干活。 3）I made many

25、 mistakes in the composition that the teacher criticized me. 我的作文中出了許多錯誤，老師批評了我。 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. 天氣那么好，我們都想出去散步。 當堂檢測 1．—You look so worried. What’s the matter? —I don

26、’t know _______（如何處理） these boring problems. 2.George was responsible for the accident because he didn’t ______（發(fā)信號） to other drivers. 3. New social problems have _____　(由……產(chǎn)生) the unfair distribution of the social wealth. 4.Jenny nearly missed the flight （由于…的原因）doing too much shopping. 5.

27、He reads English every morning，______________(以這種方式) he has had his English greatly improved. 6. _____________________(在某種程度上) I can see what you mean，but I can’t 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．______（隨著

28、孩子們的長大） ，they become more and more interested in the things around them. Period 4 Grammar and Useful Expressions Teaching Introduction This 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 perio

29、d, the teacher should first offer some revision exercises. The Pattern “And my memory become so large that I couldn’t 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

30、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.

31、 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: ⅰ Knowledge goals 1. Get students to know the structure of the present perfect

32、 passive voice. 2. Let students learn the usages of the present perfect passive voice. ⅱ Ability goals Enable students to use the present perfect passive voice correctly and properly. ⅲ Emotion goals 1. Get students to become interested in grammar learning. 2. Develop students’ sense of group

33、cooperation. Teaching important points Get students to master the structures and usages of the present perfect passive voice. Teaching difficult points Enable students to learn how to use the present perfect passive voice correctly. Teaching methods 1. Task-based teaching and learning 2. Coop

34、erative learning and practice Teaching 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) 他太聰明了，大家都喜歡他。 2) 他是一個如此聰明的男孩，以致于大家都喜歡他。 3) 他取得如此大的進步，以致于老師們都對他很滿意。 4) 他出了太多的差錯，所以考試

35、失敗了。 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

36、the passive voice 1) 被動語態(tài)的結(jié)構(gòu)：be + p.p. 2) 一般現(xiàn)在時被動語態(tài)的結(jié)構(gòu)：am/is/are (not)+p.p. 3) 一般過去時被動語態(tài)的結(jié)構(gòu)：was/were (not)+p.p. 4）含有情態(tài)動詞被動語態(tài)的結(jié)構(gòu)： can/could/may/might/will/would/shall/should/must/need(not)+be + p.p. 5）一般將來時被動語態(tài)的結(jié)構(gòu)：will (not)/be (not) to+ be+ p.p. 2. Fill in the blank with the right form of

37、 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

38、served 3) will be allowed 4) will be punished Step 3 Grammar learning ( 15 minutes) 1. Discovering Ask 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 ba

39、ck 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. 隨著時間的逝，我已經(jīng)被改變了許多。 2) I have been used in offices and homes since the 1970s. 自從20世紀70

40、年代以來，我已經(jīng)被應(yīng)用于辦公室和家庭。 3) I never forget anything I have been told. 我從來不會忘記告訴我的任何事情。 4) Since the 1970s many new applications have been found for me. 自從20世紀70年代以來，許多新的用途已經(jīng)為我開發(fā)出來。 5) I have also been put into robots and used to make mobilephones 我也已經(jīng)被裝入機器人體內(nèi)，并應(yīng)用于制造移動電話 6) I have even been put int

41、o space rockets 我甚至已經(jīng)被裝入太空火箭 2．Thinking Let 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 up The structure of the present perfect passive voice is “have/has+ been + p.p.”. It

42、 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. 現(xiàn)在完成時的被動語態(tài)的構(gòu)成（以動詞ask為例） 肯定式 否定式 疑問式 I have been asked… You have He/She/It has We have You have

43、 They have I have not been asked… You have He/She/It has We have You have They have Have I Have you been asked…? Has he/she/it Have we Have your Have they Step 4 Grammar practice ( 12 minutes) Ask students to finish the exercise 2 and 3 on page 21. Exercise 2 Change the

44、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 loca

45、l 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

46、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

47、 way your face has been washed Look at the way your hair has been combed Look at the way your shoes have been cleaned You’d better do them again. Look at the way the flowers have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that you’ll

48、 come here again. Things that have been done well Things that have been done badly Suggested answers: Look at the way your face has been washed Look at the way your hair has been combed Look at the way your shoes have been cleaned You’d better do them again. Look at the way the flowers

49、have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that you’ll come here again. Things that have been done well Things that have been done badly the way the flowers have been planted the way the grass has been cut the way the paths

50、have been swept the way your face has been washed the way your hair has been combed the way your shoes have been cleaned 2. Read this poem aloud, paying attention to the rhythm and intonation. Then write your own poem. Look at the way Look at the way

51、 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

52、 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 acti

53、ve 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 ou

54、r 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 u

55、s. 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

56、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 p

57、ractise listening comprehension. 2.To practise making decisions and reasoning TEACHING PROCEDURES: Step1. revision 1. check the homework exercises. 1). It has been reported that children will be offered free education． It has been reported that free education will be offered to children． 2).

58、It has been said that we will be offered the latest computer science course book． It has been planned that the latest computer science course book will be offered to us． 3). I have been told by Peter that I will be lent his notebook computer for a week． I have been told by Peter that his notebook

59、 computer will be lent to me for a week． 2. 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 te

60、chnology 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: W

61、hat 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 w

62、ill 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 advantages．Let’s check the answers together. Type of IT A

63、dvantages Disadvantages TV You can both listen and watch． You cannot write to friends． Web You can find information． It is very expensive． Radio You can listen to English． You cannot watch a film． Book You can get information． Sometimes it is out of date． 3. Post-listening: 1) (pair

64、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…. I’ve decided that…. 2) (group work): Discussi

65、on : 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. Speaking 1. Pre-speaking Say: From what we have learned, we should admit that compu

66、ters and the web have a great influence on the school education as well as people’s life. It has come into people’s everyday life and many families hold computers in their homes. Now there is a task for you. 2. While-speaking 1) 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