高二英语教案：《Unit 2 No smoking, please!》教学设计（四）.docx

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1、高二英语教案：Unit 2 No smoking, please!教学设计（四）高二英语教案：Unit 2 No smoking, please!教学设计（三） 高二英语教案：Unit 2 No smoking, please!教学设计（三） Teaching Aims and Demands 1.Study why its difficult to give up smoking. 2.Learn language points in this passage. Teaching Procedures Step 1 Revision Check the homework exercises.

2、 Revise the contents of the passage in SB Lesson 6. See if the Ss can tell you about the passage with their books closed! Step 2 Listening Listen to this passage twice , then answer the following questions. Why do smokers continue to smoke? Key: Because tobacco contains a drug called nicotine, and n

3、icotine can get one into the habit of smoking. It means that once you start smoking the drug, its hard to stop. Step 3 Reading Read the passage in the Students Book again and then answer the questions. 1 What is nicotine? 2 Why do so many people find it too hard to give up smoking? 3 Do you smoke? I

4、f you do, do you want to give up? Why? If you dont smoke, do you want to get yourself into the habit of smoking? Why? Answer 1.Nicotine is a drug that gets one into the habit of smoking. 2.Its because when smokers who are used to nicotinego without it for an hour or two, they begin to feel bad. 3.No

5、, I dont smoke. If I smoke, I want to give up. Because smoking is bad for my health. And I also do not want because once I get into the habit of smoking, its very hard to stop. Step 4 Discussion 1.Go through the questions on page 10. Explain any new words and phrases. Make sure the Ss know what to d

6、o. 2.Divide the Ss into groups of four for the discussion. Ask for the answers at the end of thise stage. Step 5 Language study SB Page 11, Part 3. Write the two example sentences on the Bb and revise the use of Noun Clauses as the Object and Predicative. Point out that in the Object Clause that is

7、optional, but in the Predicative Clause that is necessary and cannot be omitted. Step 6 Practice 1.SB Page 11, Part 4. First, please go over the sentences quickly to see if you understand them. 2.Ask them to do the first two as examples. Work in pairs, then check their answers. Step 7 Practice SB Pa

8、ge 11, Part 5. T helps the Ss to understand the difference between the two phrases be used to and used to. Be used to means to be accustomed to, used to is used for expressing the habits or states that existed in the past and have now ceased. First let the Ss work alone. Then check the answers with

9、the whole class. Answers: 1 used to 2 are used to 3 used to 4 am. used to 5 used to 6 are used to Step 8 Homework 1.Finish the Workbook exercises. 2.Read the second part of the passage in this lesson again for a dictation. 3.Revise the contents of this unit. 教案点评： 主要以阅读为主：共八部分的教学步骤: 起先复习上课内容； 图片导入；

10、听课文录音； 阅读课文； 语言点学习及讲探讨等。 高二英语教案：Unit 2 No smoking, please!教学设计（一） 高二英语教案：Unit 2 No smoking, please!教学设计（一） Teaching aims and demands 1.Let the Ss know the harm of smoking through this dialogue. 2. Learn the daily expressions “ask permission, give permission, refuse permission ” Teaching procedures S

11、tep 1 Lead-in A free talk with the students to review the ways of asking for permission. 1) Can I use your pen/textbook, please? 2) May I close/open the door? 3) Could I have a look at your homework? 4) Yes, of course. 5) Sure. Go ahead. Step 2 Dialogue Close your books, please. We are going to list

12、en to a dialogue between Wang Bing and Hank. They are in Hanks office. I. The first listening: Listening to this dialogue once, then answer the questions 1. What two things does Wang Bing want to do? (smoke in the office, use the phone)B 2. Can Wang Bing smoke in the office? (No. It is not allowed)

13、3. Can he use the phone? (Yes, of course.) II. The second listening: Listening to this dialogue twice, then answer the questions 1. How does Wang Bing ask for permission? Do you mind if I do? Would you mind if did? I wonder if could/can? 2. How does Hank give permission or refuse to give permission?

14、 Im sorry, but its not allowed. Im afraid all these offices are non-smoking offices. Sure. Go ahead. Step 3 Dialogue Practice Situation: If you want some money for a football ticket, you may ask your parents for permission as well as for money. - Hi, mum. There will be a wonderful football match in

15、our city this weekend. -You know, Im not interested in it at all. -Yes. But I mean, would you mind if I went to watch it? -No. -Thanks, mum. Would you give me some money for a ticket? -How much do you need? -One hundred and fifty. -Thats too much. Im afraid I cant help you. Step 4. Practice Ex.1: Re

16、ad and act out the dialogue in pairs. Ex.2; Discuss the answers in pairs then check with the whole class. The students are encouraged to give different answers. Ex:3: Get two students to read the model dialogue, then ask the students to make dialogues about the same picture in pairs, using different

17、 expressions. Finally ask several pairs to perform their dialogues. Step 5. Homework 1. Practice the phrases of permission . 2. Preparation Lesson 6. 教案点评： 主要以对话操练为主，共五部分的教学步骤: Lead-in(导入)，以问题及图片形式展示新内容; 对话听力; 对话操练; 老师给出话题，让学生练习; 课文中听力练习; 最终布置作业。 高二英语教案：Unit 2 Cloning. 克隆教学设计（二） 高二英语教案：Unit 2 Clonin

18、g. 克隆教学设计（二） Unit 2 Cloning Step I Lead-in This topic is difficult for students. So teacher should help the students learn more about it. Do this in the way of asking and answering questions. T: You can imagine how rapidly the modern science and technology develop. I think most of you must know some

19、thing about space traveling, submarine exploration, robot, maglev train, gene engineering etc. But in recent years, a hot topic, cloning is often mentioned, especially when the cloning Dolly the sheep appeared. You may have first heard of cloning when Dolly the Sheep showed up on the scene in 1997.

20、Cloning technologies have been around for much longer than Dolly, though. First things first, what is cloning and a clone? The dictionary says cloning is the technique of producing a genetically identical duplicate of an organism. A clone is said to be all descendants derived asexually from a single

21、 individual, as by cuttings, bulbs, by fission, by mitosis, or by parthenogenesis reproduction. It sounds very different and complicated to us. In fact, I mean, in our daily life, this happens often. For example, gardeners take cuttings from growing plants to make new ones. You often see that your m

22、other picks a small branch from a growing plant to make a new one. If she likes this kind of flowers, she can do cloning. Cloning also happens in animals or human beings when twins identical in sex and appearance are produced from the same original egg. The fact is that cloning plants is straightfor

23、ward but the cloning of animals is more complicated. The possibility of human cloning, raised when Scottish scientists at Roslin Institute created the much-celebrated sheep Dolly, aroused worldwide interest and concern because of its scientific and ethical implications. You can give your questions i

24、f you are interested in this topic. I am here today one of the scientists who work in this field. I am ready to answer any of your questions. S: Now we know what is cloning. Are there different types of cloning? T: When the media report on cloning in the news, they are usually talking about only one

25、 type called reproductive cloning. There are different types of cloning however, and cloning technologies can be used for other purposes besides producing the genetic twin of another organism. A basic understanding of the different types of cloning is key to taking an informed stance on current publ

26、ic policy issues and making the best possible personal decisions. The following three types of cloning technologies will be discussed: (1) recombinant DNA technology or DNA cloning, (2) reproductive cloning, and (3) therapeutic cloning. S: Was Dolly created by what cloning? And why was Dolly so impo

27、rtant? T: Reproductive cloning is a technology used to generate an animal that has the same nuclear DNA as another currently or previously existing animal. Dolly was created by reproductive cloning technology. She was the first mammal to be cloned from adult DNA taken from an adult cell. Previously,

28、 animals had only been cloned using embryo cells which already have the potential to become a complete embryo in its own right. The big breakthrough with Dolly was to make a clone from an ordinary, adult cell ? in this case from a female goats udder. S: Have you seen Jurassic Park? In this feature f

29、ilm, scientists use DNA preserved for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and fiercer than expected. Could we really clone dinosaurs. T: In theory? Yes. What would you need to do this? A well-preserved sour

30、ce of DNA from the extinct dinosaur, and a could serve as a surrogate mother. In reality? Probably not. Its not likely that dinosaur DNA could survive undamaged for such a long time. However, scientists have tried to clone species that became extinct more recently, using DNA from well-preserved tiss

31、ue samples. More questions about cloning are given in the appendix. The information above is for reference only. Or you can choose several students and ask them to act out a short play whose main topic is as follows: An old man who was dying left all his fortune to his own son. But the did not know

32、that his son was cloned. So two same young men both claimed that they were the old mans son. They quarreled and fought with each other; at last they went to the judge. The judge let them check DNA. The result was that their DNA was the same. Now even the judge did not know what to do. In this part t

33、he teacher can give the students some advice to act out. According to this play teacher ask the students several questions: 1. Do you want to be cloned or not? Why? 2. If you are the judge what will you do? 3. Can you tell me the advantages of cloning? 4. And what is the disadvantage? Discussion In

34、this part the students will discuss the relationship between the development of technology and social customs. T: As the technology develops day by day, it has a more and more important influence on the whole society. Technology affects social customs and ethics, sometimes technology may go against

35、the conventional thinking, then comes the problem that whether we should stop the development of research or change the ethics. S1: As technology develops in almost every field, a lot of our original customs and ethics changed, either because they are out of time or not so scientific. For example mi

36、llions of years ago human ate meat of animals without heating them. Later people used fire and no longer ate raw meat and they also used fire to scare dangerous animals. S2: I think we could not stop the development of technology, for it may develop in the way which is acceptable by social customs.

37、Look at pictures T: Look at the pictures and discuss which ones are natural clones and which ones are man made. Then explain how they differ. S: I think the twins are natural clones and the Dolly sheep is man-made. T: You are right! Can you explain how they differ? S: The twins were born at the same

38、 time, but the Dolly sheep is man-made. T: Anything else? Who want have a try? S: I think the identical dog is man-made. T: Good Job Step II Pre-reading Before class, ask the students to search for some information about this topic. Now show your questions on the screen, and then let them discuss wi

39、th each other. T: Now please work in pairs and discuss about cloning. Then list the questions you want to find out. Share your list with your partner. Ss: Yes, sir / madam. Questions about cloning: 1. What is a clone? 2. How is a clone produced? 3. What benefits can humans gain from cloning? 4. What

40、 problems may arise when humans are cloned? 5. Should we clone human? 6. Could cloning replace sex as the means of creating new human life? 7. Could a parent clone a child who is dying of a terminal illness? After a few minutes. T: Do you have other questions? Volunteer! S: I have! What is the write

41、rs opinion? T: Good job! I think many of you have questions, now let us read the article with the questions. Suggest answers: 1. It is a way of making an exact copy of another animal and plant. 2. This happens in plants when gardeners take cuttings from growing plants to make new ones, and when smal

42、l parts of a plant are taken and gown in a laboratory. It also happens in animals when twins identical in sex and appearance are produced from the same original egg. 3. It can help cure disease and can help couples who have no baby to bear a new baby. 4. There may be more bad people like Hitler. 5.

43、In my opinion, I do not agree, for it may cause many moral problems. 6. No. Because cloned human has the same quality as the real human, natural born babys quality is higher than his parents. 7. No. The cloned baby also has the disease. Step III While- reading Get the students to comprehend the pass

44、age quickly and accurately and meanwhile help the students form a good habit of reading. T: Have you not the answers of your questions? Now please skim the passage fast to obtain a general understanding of the whole passage into several parts and find out the main idea of each part. Show the followi

45、ng. Para. 1 Cloning is a way of making an exact copy of another animal and plant. Para. 2 Cloning has two major uses. Para. 3 The problems of Dolly. Para. 4 The effect of Dolly. Para. 5 It is forbidden to clone human being. Step IV Post-reading Ask the students to read the passage again to finish th

46、ree tasks. T: Now lets listen to the. While listening, pay more attention to the correct pronunciation and tone. Then read the text by yourselves to get the answers to the three tasks. You can work in groups. T: First, What are the problems or dangers of cloning? S: Let me have a try! First, the cloned animals have the same illness of old animals and the same goes with the other species. Second, the clo