人教版高二英语选修8Unit2Cloning全单元教案.doc

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1、Unit 2 CloningThe First Period warming up Aims1. Talk about cloning2. Practice expressing and supporting an opinionContentsTask one: Looking and speaking In pairs, look at the pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ. A. Dolly the sheep

2、B. A strawberry plant C. Twins D. Identical dogs Task two: Questions about cloningWhat is a clone?How is a clone produced?What benefits can humans gain from cloning?What problems may arise when humans are cloned?Task three: Free talkIn pairs, discuss what you understand about cloning, then list the

3、questions you want to find out. Share your lists with one another.1. Should we clone human?2. Could cloning replace sex as the means of creating new human life?3. Could a parent clone a child who is dying of a terminal illness?The Second Period ReadingAims:1. Help the Ss to know how to describe clon

4、ing and how to catch the details of the text.2. Activate the Ss to show their opinions about the cloning and enable the Ss to write and article on this debate.Contents:Leading in by revision.Task one: Fast readingWhat is a clone?Show the following.1. Cloning means making a copy of an animal or a pla

5、nt. (F. exact another)2. Gardeners can make a lot of money by cloning plants.(T.)3. Cloning animals is as complicated as cloning plants.(F. more than)4. Dolly the sheep was the first successful clone of a mammal. (T.)5. Natural clones happen in animals as well as in plants.(T)Task two: Careful readi

6、ngRead the text again, try to answer the following questions and find out the main idea of each paragraph .Questions:1. Whats the main idea of the text?2. How many years did the sheep that donated the somatic cell most probably live? 3. Why did the Cloning of Dolly the sheep succeed?4. What does the

7、 word straightforward mean in the second paragraph?5. What is the writers attitude toward cloning in this passage?The main idea of each paragraph:Para. 1 Cloning is a way of making an copy of another animal and plant.Para. 2 Cloning has two major uses.Para. 3 The problems of Dolly.Para. 4 The effect

8、 of Dolly.Para. 5 It is forbidden to clone human being.Task three: Notes for debating: Should we use cloning?Argument for cloning:Cloning will be beneficial to humansWe could use cloning to cure illnesses.Arguments against cloning:healthy risks form mutation of genesemotional risksagainst naturerisk

9、 of abuse of the technologyCloned animals get ill and die quite young;The Third Period Language Points Aims:1. Enable the Ss to grasp the words of cloning.Get the Ss to master some useful expressions.Contents:1. differ v.1) “To be dissimilar or unlike in nature, quality, amount, or form”eg：Ambition

10、differs from greed.2) “To be of a different opinion; disagree”eg：The critic differed with the author on several facts.2. exact adj. “Strictly and completely in accord with fact; not deviating from truth or reality”eg：an exact account; an exact replica; your exact words.3. commercial adj. 1) “Of or r

11、elating to commerce” 2) “Engaged in commerce eg：a commercial loan; a commercial attach; a commercial trucker.4. straightforward adj. 1) “honest 2) “easy to understand”eg: a explanation; written in language; a problem in algebra5. procedure n. 1) A manner of proceeding; a way of performing or effecti

12、ng somethingeg：complained to the manager, and by this procedure got the money back.2) “A series of steps taken to accomplish an end”6. undertake v. 1) “To take upon oneself; decide or agree to do”eg：undertake a task.2) “To pledge or commit (oneself) toeg：undertake oneself to care for an elderly rela

13、tive.7. breakthrough n. 1) “An act of overcoming or penetrating an obstacle or restriction.”2) A military offensive that penetrates an enemys lines of defenseeg: a in cancer research8. disturb v. “break the quiet, calm and peaceeg: She opened the door quietly so as not to disturb the sleeping boy. D

14、ont the papers on my desk.9. arbitrary adj. 1) “Determined by chance, whim, or impulse, and not by necessity, reason”eg：stopped at the first motel we passed, an arbitrary choice; arbitrary division of the group into halves.2) “Based on or subject to individual judgment or preference”eg：The diet impo

15、ses overall calorie limits, but daily menus are arbitrary.10. altogether adv. 1) “Entirely; completely; utterly”eg：lost the TV picture altogether; an altogether new approach.2) “With all included or counted; all told”eg：There were altogether 20 people at the dinner.11. objection n. “The act of objec

16、ting”eg: He has a strong to getting up early. s to the plan will be listened to sympathetically.12. media n. 媒体eg: The running for president drew the s attention. Now the press is an useful media.13. moral adj. 1) “Of or concerned with the judgment of the goodness or badness”eg：moral scrutiny; a mor

17、al quandary.2) “Teaching or exhibiting goodness or correctness of character” eg：a moral lesson.14. accumulate v. “To gather or pile up”eg: By buying ten books every month, he soon d a library. Dust soon s if the room is not swept. 15. forbid v. 1) “To command (someone) not to do something”eg：I forbi

18、d you to go.2) “To command against the doing or use of (something); prohibit”eg：forbid smoking on trains.The Forth period Learning about language and Using language Aims:Let the Ss know more about the cloning.Improve the students listening, reading and writing ability.Contents:Task one: gap filling1

19、. Complete the sentences using suitable words or phrases from the prevision sections.2. Rewrite the sentences using words of similar meaning to replace the underlined words.3. Use the words and phrases below to fill in the passage.Task two: reading and discussing1. Read the passage and answer the qu

20、estions.2. In pairs, discuss which extinct animals described below (which died out less than 10,000 years ago) are worth restoring by means of cloning.a. Auroch (1627) b. Dodo bird (1755)c. Great auk (1844) d. Quagga (1883)Task three: listening and writing1. Read the statements before listening. Tic

21、k those that you hear.2. Listen to the tape again and then work with a partner to fill in the chart on page 17.3. Whose idea do you agree with according to the listening materials? Get ready to write a composition. Think about the reasons for your point of view. Use your own ideas as well as those in the text.