Using LanguageⅡPPT及课堂实录内容

Book 8 Unit 2 Cloning Using language Teaching Plan Teaching Goals: To get Ss to learn more about cloning.

To get Ss two think about the development of the cloning.

Writing on the blackboard: Unit2 Cloning The Return of the Dinosaurs?

Para.1 People are interested in cloning extinct animals. Para.2 The reasons why we cannot clone animals like dinosaurs. Para. 3 The conclusion: It is merely a dream.

Teaching Procedures: Step 1. Reading,(Using Language) 1. Leading-in Purpose: To lead Ss to the topic and arouse the Ss’ interest in reading.

Show a picture from the film Jurassic Park. Ask Ss to discuss the following questions. (1) Which film is it from? Have you seen the film? Do you like dinosaurs? Where have you seen them? Can you see them in our real life? Why? (2) Do you think it is possible to clone dinosaurs? Why?

2. Fast reading Purpose: To get a brief understanding of the text. (1) Ask Ss to read the text in two minutes and try to get the main idea of the text.

(2) Ask Ss to discuss the following questions and then answer them in pairs.

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 have to live in a zoo? ③

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

3. Intensive reading Purpose: To get Ss to have some details in the text. (1) Ask Ss to read the passage carefully and choose the best answer to complete each sentence.

①

Who are interested in cloning fierce and extinct wild animals?

A. Film makers

B. Ordinary people

C. Film makers and ordinary people

D. No one ②

We are a long way from being able to clone extinct animals because ________.

A. scientists are not experimenting with cloning mammals

B. the cloning of mammals is not difficult

C. scientists have not succeeded in cloning any mammals

1

D. the cloning of mammals is a new field ③

The cloning of mammals began seriously ________

A. 1950

B. 1996

C. in the fifth decade of the nineteenth century

D. in the fifth decade of the twentieth century ④

What is the meaning of diversity in a group ?

A. It means passing on the ability to resist that disease to their children

B. It means having animals with their genes arranged in different ways C. It means all of them would be left to continue the species if there is a new illness

D. It means all of them might die of the same illness Suggested Answers:

①

C

②

D

③

D

④

B

(2) Ask Ss to read the text again and have a discussion according to the requirement of Ex2 on P16. Ss work in groups; when discussing, the head of each group should write down the opinions of all the members. Ask some volunteers to show their opinions. 4. Language point

Ask Ss to go through the text, and find out the following sentences and 2

analyze them. (1) The popularity of the film Jurassic park, in which a scientist clones several different kinds of extinct dinosaurs, proves how interested ordinary people are in the subject.

(2) This is because the cloning of mammals is still a new science and its story began seriously in the 1950s as this chart shows: (3) From time to time people suggest that the animals that have disappeared from the earth, like dinosaurs, can possibly be brought back to life through cloning.

(4) Unfortunately, with what we know now, this is either impossible or unsuitable. (5) The advantage is that if there is a new illness some of these animals may die, but others will survive and pass on the ability to resist that disease to their children. (6) It would be unfair to clone any extinct animals if they would have to live in a zoo.

(7) Based on what we know now, you cannot clone animals that have been extinct longer than 10,000 years. Step 2. Summary Sum up the main idea of each paragraph. Para.1 People are interested in cloning extinct animals. Para. 2 The reasons why we cannot clone animals like dinosaurs. 3

Para. 3 The conclusion: It is merely a dream. Step 3. Homework Try to retell the passage. 4