Using LanguageⅡppt课件课堂实录

教学设计

Period V

Using language : Reading and Discussing

(Book 8 Unit 2 Cloning) 会宁四中

王鹂

Teaching aims 1. Activate the Ss to show their opinions about the cloning

2. Learn language points and remember them.

Teaching important points:

1. Master the reading ability.

2. Discussion and express oneself.

Teaching difficult points: Previewing Case Look at the following pictures and think which film they are from.

1. Have you ever seen the film Jurassic Park? Why do people like this film? What animals do you see in the film? Are they real?

2. Do you like dinosaurs? Can you see them in our real life? Why?

3. Do you think it is possible to clone dinosaurs? If not, why? If yes, do you think that’s good for human beings? Why?

Teaching procedures: Step I

Extensive reading : Read the passage to deal with the following tasks. I. Skiming: Arrange according to time. 5. research using the embryos of mice 4. first experimental clones of cows 8. first experimental clones of mice 7. work on the embryos of sheep and mice 2. China’s first cloned twin calves 3. cloning of frogs 6. first clone of a mammal 1. cow gave birth to a bison The right order:______________________

II. True or False.

1. Scientists are still experimenting with cloning mammals because theythink it can make money. ________

2. The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning. ________

3.If we can clone any extinct animals, we should let them live in a zoo._____

III. Choose the best answer.

1.The writer of the text _____.

A. is excited by the possibility of cloning fierce and extinct animals

B. believes that extinct animals can be brought back to life by cloning

C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs

D. dreams of dinosaurs returning to the earth

2. The film Jurassic Park is popular because _______ .

A. people are interested in the subject of cloning

B. all the actors are dinosaurs

C. it was directed by a scientist who clones dinosaurs

D. it proves very interesting 3. Which of the following is true?

A. Mice were cloned in 1981.

B. Dolly the sheep was the first cloned animal.

C. The name of the cloned cow is “Bison”.

D. China was successful in cloning mammals.

4. The reasons why a group of cloned animals all die of the same illness do NOT include ____.

A. they have the same arrangement of genes

B. there isn’t enough diversity in the group for it to overcome illnesses

C. the illness is a new one

D. their arrangement of genes can not resist that new disease

5. We can infer from the text that ____.

A. scientists are experimenting to clone dinosaurs

B. dinosaurs will never return to the earth

C. cloned animals will only live in the zoo

D. the DNA of dinosaurs can only survive 10 000 years

III. Read the text and answer the questions.

1.Why shouldn’t you clone an extinct animal unless there is enough diversity in the group?

2. Why is it wrong to clone an extinct animal if it would live in a zoo?

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

IV.

Give some reasons why it is either impossible or unsuitable to clone extinct animals. Reason 1: ___________________is needed. Reason

2: There is not enough ____ for cloned animals to _____ new diseases. Reason

3: It would be __________ to clone any extinct animals if they would have to live in a zoo.

V. Careful Reading to fill in the blanks. People interested in Not only film makers but also _________________.____________ for its impossibility

?Perfect DNA is needed. There is not enough ________ in the group. A (n) ______________ would be needed for the cloned extinct animals. __________ The chance of dinosaurs returning to the earth is ______________. VI. Choose synonyms(同义词)

1. It proves how the idea struck a mixture of fear and excitement into people’s hearts.

A. Have on the brain B. Confused C. Droved people crazy

2. From time to time people suggest that extinct animals… A. There was a time when B. Occasionally C. All the time D. Scared D. Each time 3. People suggest that dinosaurs, can possibly be brought back to life. A. Kept up B. resist C. live on D. relived

4. The initial requirement is that you need perfect DNA. A. Most thankful B. most pressing C. most difficult D. most needed

5.All efforts of cloning an animal will be in vain if there is not enough diversity. A. Go to waste B. useless C. helpless D. meaningless

6. Others will pass on the ability to resist that disease. A. oppose B. slide C. hire D. indicate

7. The chance of dinosaurs ever returning to the earth is merely a dream. A. only B. surely C. abruptly D. miserably Step IV Writing 写作任务: Give your opinion on cloning

写作要求: 注意记叙文的表达方式;要写明白自己的观点, 层次要分明。

写作建议: 本单元主要讲述了“cloning”存在的问题以及人们的态度, 文中可

适当就此进行发挥。

Writing – I Discussion ( 5ms ) Discuss in groups and write down the information you get.

Writing – II ( 20ms ) After the discussion, the students write a passage according to the writing task. (There are at least 100 words.) Writing –

III (12 ms ) Checking the articles. 1. Ask the students to check the articles for their partners. 2. Show some articles on the screen, other students should give some advice. One possible version 【范文】

Together with the modern advances in science and technology, the news that Dolly had been born was announced in 1997. However, Dolly’s death raised many opinions about cloning. Personally, I would like to agree that cloning may do no good to our human beings. Firstly, seeing Dolly, we may think that cloning animals can easily develop a disease. They can’t live long. Secondly, we can’t clone animals that have been extinct longer than 10000 years, even if the DNA of dinosaurs could survive this long. Thirdly, based on what we know now, human cloning is just a matter of time. But the assumption that human clones have already been born hasn’t been proved yet. In one word, personally, the chances of cloning animals and cloning human beings living on the earth naturally are merely a dream. Step V. Homework Review this part and practice reading the passage.