Using LanguageⅡ优质课教案推荐

Book8 Unit 2

THE RETURN OF THE DINOSAURS?

莆田十中

英语组

邱群英

教学目标：Integrating skills :

Reading , understanding and expressing by writing

Target language 目标语言

重点词汇：strike

initial

vain

resist

drawback

merely

decoration

unable

feather

turkey

claw

adore

hatch

reasonable

重点短语：from time to time,

bring back to life, pay off, in vain 重点句子：

1.The popularity of films such as Jurassic Park, in which a scientist clones several kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into people's hearts. 2.I suggest that medical cloning is very important of curing serious illnesses that at present have no cure. 3.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 the next generation. 4.The great drawback to cloning a group of animals is that they would all have the same arrangement of genes and so might die of the same illness. 2. Ability goals能力目标

Activate the students to show their opinions about the cloning the extinct animals. Enable the students to write an article based on ideas. 3. Learning ability goals学能目标

Help the students learn how to organize a passage and how to write a short composition of this kind . Emotional target情感目标：Inspire the students interest of study by learning this one and the determination of solving the difficult problems.

Teaching important and difficult points教学重难点

How to organize the debating materials. How to write a short composition of the debate. Teaching methods教学方法

Task-based teaching method. Teaching aids教学准备

A computer and a projector. Teaching procedures & ways教学过程与方式

Step 1 Lead-in

Show the students some pictures about Jurassic Park to raise the students' interest. Then give the students the question: Do you like live with dinosaurs? If students say that they would like with the dinosaurs. Then I can ask the students:“Do you think it possible for people to clone a dinosaur? Why?”

Now let's go into the text. 1

Step2 Reading

Task I. Fast reading. Match the main idea with each paragraph Para. 1

Introduce the topic of the passage

Para. 2

Explain the impossibility of cloning dinosaurs Para. 3

Conclude that it is just a dream

Task II. Para.1 1.Why does the text mention the movie Jurassic Park ?Choose the best answer.

A. It is just the film that makes people feel fearful and excited.

B. It aims to introduce the cloning of the extinct topic. 2.Why does the text list the years from 1950s to 2005 ?

1) They are not the only ones. 2)We are ____________________ from being able to clone extinct animals. 3) Scientists are still ___________________________ cloning mammals. 4)Cloning is a new science. Task III. Para.2 1.What is the writer’s attitude towards cloning the dinosaurs? A. Supportive.

B. Neutral.

C. Negative.

D. Subjective. 2.Why is it impossible or unsuitable to clone extinct animals? 1).perfect DNA

2). Enough diversity 3).a suitable habitat 3.The great drawback to cloning a group of animals is that they would all have the same arrangement of genes and so might die of the same illness. （Translate the sentence into Chinese.）

4.What can you infer (推测)from the sentence" The great drawback to cloning a group of animals is that they would all have the same arrangement of genes and so might die of the same illness. Then none of them would be left to continue the species." ？Choose the best answer . A. Not all of them can survive at last.

B. We cannot clone the dinosaurs successfully in the end if we don't change the arrangement of their genes. Task IV. Para.3

Time limit: no longer than 10,000 years ago but dinosaurs died of more than 65,000,000 years ago. So it is just a dream now. Step3: Consolidation 1.

From time to time

people suggest that extinct animal…

A. Long time ago

B. Sometimes C. All the time

D. Each time 2.

People suggest that dinosaurs can possibly be brought back to life.

A.

make a life

B. earn one’s living

2

C. live on

D. make the dead alive

3.

The initial requirement is that you need perfect DNA. A.

most thankful

B. final C. most difficult

D. original

4.

All efforts of cloning an animal will be in vain if there is not enough diversity. A. careless

B. useless

C. helpless

D. homeless

5.

Others will pass on the ability to resist that disease. A.

fight against

B. infect

C. hire

D. indicate 6.

The chance of dinosaurs ever returning to the earth is merely a dream . A. actually

B. only

C. nearly

D. finally Step4

Summarize the passage by filling in the blanks.

The __________ (possible) of cloning fierce and extinct wild animals has always excited people. Scientists are still experimenting with cloning animals. This is ________ the cloning of mammals is still a new science.

Occasionally people suggest that dinosaurs can possibly __________ (restore). Unfortunately, with ______ we know now, this is either impossible or _________(suit). There are many reasons.

Firstly, the initial requirement is that you need perfect DNA. Secondly, all efforts will be ____ vain if there is not enough genetic variation (变异) to resist new _______ (ill). Thirdly, a suitable habitat would be needed for them to live in a _______ environment.

_______ on what we know now, we cannot clone animals that have been extinct longer than 10,000 years ago. So the chance of dinosaurs _________ to the earth is merely a dream. (121 words)

Step5 Show your ideas Now please write down on your paper which extinct animals described below (which died out less than 10,000 years ago )are worth restoring by means of cloning . Choose one animal from the table below and use the information to help you argue why this animal should be restored to the earth.(less than 40 words)

You can refer to page17. Which to clone? Why?

Name Auroch (1627) Information Large wild cattle; long horns and hair; hair good for making into clothes; horns can be used for decoration; need grasslands Dodo bird

Unable to fly; friendly and not harmful; large eggs and tasty meat that (1755) could be developed for food; needs hot climate Great Auk

Very large bird that cannot fly; lives by and in the sea; feathers do not (1844) absorb water; useful for protecting clothes from water 3

Quagga

Skin looks like a zebra; can be used for decoration; meat very tasty; (1883) needs warm climate Step6: Writing( usual structure)

Raise an opinion:

State the reasons…

Draw a conclusion

Step7 Homework Please write a passage about 120 words. According to the discussion, further describe why you will clone the chosen extinct animal. You can refer to P.17.

This two steps are to train the students writing skills by the writing exercises. I will exam and correct the unsuitable places after the students hand them in and remark them next class.

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