人教新课标选修八 Unit 2 Cloning单元教案

嘉兴英语教学网 www.jxenglish.com 收集整理 欢迎使用 Teaching important points 教学重点

Listen to the materials about cloning and choose the correct answers. Teaching difficult points 教学难点

Work together with partners and show their own opinions. Teaching methods 教学方法

Listening and cooperative learning. Teaching aids 教具准备

A tape recorder.

Teaching procedures & ways 教学过程与方式

Step I Revision 1. Greetings 2. Revision

Step Ⅱ Pre-listening

Work in groups to discuss how we should behave towards the human clones. T: Before human clones become part of our life, perhaps we should spend some time thinking about how we should behave towards them. Now, work in groups to discuss the following questions. Show the following.

1. How would you treat human clones?

2. Do you think they should have legal and political rights, such as getting married or voting?

3. Do you think they are separate people or part of the original donor? Sample answers:

1. I will treat them as normal people.

2. Yes, I think they should have the legal and political rights. 3. I think they are separate people.

Step Ⅲ Listening

The students are asked to read fast the questions and multiple answers to find out the listening points first, and then listen to the tape twice to choose the best answer.

T: Please open your books at page 54. Before you listen to the tape, please read fast the questions and multiple answers to find out the listening points. Pay more attention to these important points while listening. While listening, you’d better make notes of the listening points. A few minutes later.

T: Now, I’ll play the tape twice. Please listen carefully and pay more attention to the important points. You may make notes while listening. Notes taking are helpful for you to remember each of the important points. After listening twice, check the answers and explain some difficult listening points if necessary.

Step Ⅳ Listening task (P57) (时间不足时改为作业)

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嘉兴英语教学网 www.jxenglish.com 收集整理 欢迎使用 First, ask the students to read these sentences and then listen to the tape and decide if they are facts or opinions.

T: Now turn to page 57, there’re 10 questions. You should form the habit of going through the questions and the answers to get the important listening points. Yes? And make notes if necessary. OK?

Play the recording and then check the answers with the class. Sample answers:

Arguments for cloning pets:

1. Favorite pets can live forever as clones. 2. It is moral to clone pets for their owners. Arguments against cloning pets:

1. Many people don’t agree with cloning.

2. Some people think that cloning pets is selfish.

Step Ⅴ Homework

T: Boys and girls, today we have listened to some materials about cloning. I do hope you can listen to the materials again after class so that you can get very familiar with them. Besides, please preview the reading. Now class is over. Goodbye, everyone.

Ss: Goodbye, sir / madam.

The Third Period Speaking

Teaching goals 教学目标 1. Target language目标语言 a. 重点词汇和短语

theme，fighting，conflict，argument，destruction，in one’s opinion b. 交际用语Expressing and supporting an opinion I would never accept... I’m not bothered about... I don’t mind but...

I hope you’ll carry on...

Are you sure you want to...? I agree with you that...

Do you think it is wise to...? I think you should... Well done to you for... I can’t help thinking... I could never agree to... 2. Ability goals能力目标

Enable the students to express their opinions about cloning using some useful expressions.

3. Learning ability goals 学能目标

Help the students learn how to express their opinions. Teaching important points教学重点

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嘉兴英语教学网 www.jxenglish.com 收集整理 欢迎使用 Learn to use the structures of expressing and supporting an opinion. Teaching difficult points 教学难点 How to give a speech.

Teaching methods教学方法 Cooperative learning. Teaching aids教具准备

A computer & a projector.

Teaching procedures & ways教学过程与方式

Step Ⅰ Lead-in

T: Good morning / afternoon, boys and girls! Ss: Morning Mr...

T: Last class we have talked about clone, we all know it is not a dream. Now everyone, if I give you a chance to clone what will you restore then? S: Edison, dinosaurs, Japanese wolf, Einstein. T: Do you want to clone Hitler?

S: No. Hitler is a dangerous person.

T: If some terrorists master this clone method, they may bring disasters. All your choices are excellent. Today we will learn another passage about cloning, from which we will know whether we can bring dinosaurs back to life. Ask the students to go through some facts of cloning.

T: From these facts we know human beings have achieved great progress in cloning. Now read the text carefully to get the answers for these questions: what animals have people cloned?

S: Frogs, mice, cows, sheep, bisons, cats, and dogs.

T: Good job. Answer the question: What are the common characteristics of these animals?

Ss: They are nowadays animals.

T: Yeah, I think you must have seen the film Jurassic Park, in which a scientist clones several different kinds of extinct dinosaurs. Can we really clone dinosaurs now?

Let the students turn to page 15 and then read the text quickly. Several minutes later.

S: We cannot clone dinosaurs, because it’s difficult for us to get its DNA.

T: Good job. It’s only a dream. Dinosaurs disappeared 65,000,000 years ago. So the chance of dinosaurs ever returning to the earth is merely a dream.

Step Ⅱ Read and answer (P16)

To answer these three questions, teacher can give the students some examples as explanation, for example, Question 1.

T: Now think about this question: if in the world there is only one sheep and human beings want to clone more. Some days later a Dolly appears, then many more. But one day all sheep get the same deadly disease. Now please think about what the results are.

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S: Maybe they would all die. T: Why?

S: Because all sheep have the same arrangement of genes.

T: Right. Now can you answer Question 1? Why shouldn’t you clone an extinct animal unless there is enough diversity in the group?

S: It is useless to clone an animal if there is not enough diversity in the group for it to overcome illnesses.

T: Why is it wrong to clone an extinct animal if it would have to live in a zoo? S: If the cloned animals have to live in the zoo, it is unfair to them. They need freedom.

T. Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years?

S: Dinosaurs disappeared 65,000,000 yeas ago. So the chance of dinosaurs returning to the earth is merely a dream. Step Ⅲ Discussion (Question 2)

This is a speaking task. Ask the students to have a discussion in groups, organize their words properly, and give vivid description of the chosen animals. T: Now look at the table on page 16, discuss in pairs which extinct animals described are worth restoring by means of cloning. Choose one animal and use the information to help you argue why this animal should be restored to the earth.

Give the students six minutes to discuss.

S1: I think Great Auk is a wonder. Because it is a very large bird that cannot fly. The useful thing about it is that its feather doesn’t absorb water. I think if we wear clothes made of its feather, we will not worry about rain.

S2: I agree with you. But I am happy to accept Dodo bird because it is friendly and not harmful. I like gentle animals. It can also lay large eggs and its meat is tasty, but I don’t think I will eat its meat. …

T: From your answers I think these animals are all useful and they all should be restored to the earth. At the same time, we should try our best to protect them. Do you agree with me? S: Yes.

Step Ⅳ Writing a report (P17)

Deal with Questions three and four. Divide the whole class into four groups. Then they can have a competition.

T: Now everyone, imagine all of you are owners of your chosen animal. Now work together, and give us a vivid description of your pet, then I will decide which one is the best to be resorted to the earth.

Several minutes later, the students give performances. At the same time, list some major points on the blackboard.

T: Well done everyone. It is really hard for me to choose, let us vote OK?

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