Unit 2 Cloning
Ｉ． 单元教学目标
技能目标 Goals
Talk about cloning
Practice expressing and supporting an opinion
Use the appositive clause
Write a composition about cloning
Expressing and supporting an opinion
I’m happy to accept …. But….
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….
Is it fair to….?
Do you think it is wise to….?
I think you should….
Well done to you for….
I don’t understand why you don’t….
I can’t help thinking….
I could never agree to….
1. 四会词汇
Strawberry，differ，exact，straightforward，breakthrough，disturbing，cast，altogether，
objection，media，moral，ceiling，shortly，retire，assumption，merely，decoration，
zebra，aloud
2. 认读词汇
identical，nucleus，gene，somatic，embryo，fate，impact，extinct，popularity，Jurassic，
bison，calf，DNA，habitat，restore，Auroch，Great Auk，Quagga
3. 词组
cast down，object to，the media，in favour of，（be）bound to（do）…, from time to
time, bring back to life, pay off
4． 重点词汇
clone， commercial， producer， undertake， arbitrary，object ，forbid， accumulate
bother， regulation， resist， unable， argument ，reasonable， obtain
功 能 句 式
词 汇
Ⅱ.目标语言
结构
Appositive clause — that 可引导同位语从句
It is a way of….P11
The fact is that….P11
The question that occurred is….P12
How differently do people think of….P14
The….is …but…P14
The advantage is that….P15
How would you treat….P54
I don’t mind but….P55
I agree with you that….P55
重 点 句 子
III. 教材分析与教材重组
1. 教材分析
本单元以 Cloning 为话题，旨在通过单元教学，使学生了解克隆技术的优缺点，学会表达和 支持个人观点，能用所学的有关 Cloning 的词汇去表述自己对这一新技术的观点和看法。
1.1 Warming Up 提供了四幅有关 Dolly the sheep(多莉羊) A strawberry plant(草莓植物) Twins（双胞胎婴儿） Identical dogs(克隆狗)的图片，让学生用已有的知识和经验讨论对克 隆技术的看法与观点。
1.2 Listening 是关于人类克隆的听力材料，难度中等。
1.3 Speaking 根据材料，四人小组合作，要求把自己对克隆婴儿的态度和感觉用相关的 语言表达出来。语言要得体，锻炼语段表达能力。
1.4 Pre-reading 是 Reading 的热身活动。它要求采用与同学讨论交流的方式谈论有关克 隆的相关知识。
1.5 Reading 是一篇介绍克隆技术的说明文。
1.6 Comprehending 第一题所给出的表格让学生根据课文内容列举克隆技术的优缺点。 第二题让学生根据所拥有的知识来评价作者的观点。第三题要求学生用自己的语言阐述对克 隆技术的观点并给出理由。
Learning about Language 分词汇和语法两部分，其中 Discovering useful words and expressions 是根据语境在运用中掌握词汇。Discovering useful structures 是通过阅读和补全
句子来练习。
Using Language 中的 Reading，Discussing and writing 要求学生先读, 然后完成四个 任务型的作业。即 1. 讨论并回答三个问题。回答这些问题，2. 讨论几种已经灭绝的动物， 并且讨论哪种动物应该被恢复到这个世界上，并且给出理由。3. listening and speaking 让学 生根据所听到的内容选择并列出文中人物观点。
2. 教材重组
2.1 从话题内容上分析，Warming Up 与 Reading 相一致；而从训练目的上分析与 TALKING 比较一致。从教材份量来说，可将 Warming Up 和 Reading 整合在一起，设计成 一节任务型“阅读课（一）（精读课）”。
将 Listening 和 Workbook 中的 LISTENING 整合在一起，设计成一节 "听力课"。
将 Using Language 与 Workbook 中的 TALKING 和 SPEAKING TASK 结合在一起， 设计成一节“口语课”
将 Learning about Language 与 Workbook 中的 USING WORDS AND EXPRESSION
整合在一起上一节“语法课”。
将 Workbook 中的 READING TASK 和 PROJECT 以及 WRITING TASK 整合成一节
“泛读与写作课”。
3. 课型设计与课时分配
1st period Reading
2nd period Listening
3rd period Speaking
4th period Grammar
5th period Extensive reading and writing
Ⅳ. 分课时教案
The First Period
Warming Up, Pre-reading and Reading
Teaching goals 教学目标
1. Target language 目标语言
a. 重点词汇和短语 clone，commercial，producer，undertake，arbitrary，object，forbid，accumulate，cast down， object to，the media，in favour of
b. 重点句子
It is a way of…. The fact is that….
The question that occurred is….
1. Ability goals 能力目标
Enable the students to describe cloning: What is the advantages of cloning？ What is the problems or dangers of cloning？What is your opinion of cloning？
2. Learning ability goals 学能目标
Help the students learn how to describe cloning.
Teaching important points 教学重点
How to describe cloning.
Teaching difficult point 教学难点
Help the students analyze the writing techniques of the article.
Teaching methods 教学方法
Skimming, task-based method and debate method.
Teaching aids 教具准备
A recorder, a projector and some slides.
Teaching procedures & ways 教学过程与方式
Step I Lead-in
This topic is difficult for students. So teacher should help the students learn more about it. Do this in the way of asking and answering questions.
T: You can imagine how rapidly the modern science and technology develop. I think most of you must know something about space traveling, submarine exploration, robot, maglev train, gene engineering etc. But in recent years, a hot topic, cloning is often mentioned, especially when the cloning Dolly the sheep appeared. You may have first heard of cloning when Dolly the Sheep showed up on the scene in 1997. Cloning technologies have been around for much longer than
Dolly, though. First things first, what is cloning and a clone? The dictionary says cloning is the technique of producing a genetically identical duplicate of an organism. A clone is said to be all descendants derived asexually from a single individual, as by cuttings, bulbs, by fission, by mitosis, or by parthenogenesis reproduction. It sounds very different and complicated to us. In fact, I mean, in our daily life, this happens often. For example, gardeners take cuttings from growing plants to make new ones. You often see that your mother picks a small branch from a growing plant to make a new one. If she likes this kind of flowers, she can do cloning. Cloning also happens in animals or human beings when twins identical in sex and appearance are produced from the same original egg. The fact is that cloning plants is straightforward but the cloning of animals is more complicated. The possibility of human cloning, raised when Scottish scientists at Roslin Institute created the much-celebrated sheep "Dolly", aroused worldwide interest and concern because of its scientific and ethical implications. You can give your questions if you are interested in this topic. I am here today one of the scientists who work in this field. I am ready to answer any of your questions.
S: Now we know what is cloning. Are there different types of cloning?
T: When the media report on cloning in the news, they are usually talking about only one type called reproductive cloning. There are different types of cloning however, and cloning technologies can be used for other purposes besides producing the genetic twin of another organism. A basic understanding of the different types of cloning is key to taking an informed stance on current public policy issues and making the best possible personal decisions. The following three types of cloning technologies will be discussed: (1) recombinant DNA technology or DNA cloning, (2) reproductive cloning, and (3) therapeutic cloning.
S: Was Dolly created by what cloning? And why was Dolly so important?
T: Reproductive cloning is a technology used to generate an animal that has the same nuclear DNA as another currently or previously existing animal. Dolly was created by reproductive cloning technology. She was the first mammal to be cloned from adult DNA taken from an adult cell. Previously, animals had only been cloned using embryo cells which already have the potential to become a complete embryo in its own right. The big breakthrough with Dolly was to
make a clone from an ordinary, adult cell − in this case from a female goat’s udder.
S: Have you seen Jurassic Park? In this feature film, scientists use DNA preserved for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and fiercer than expected. Could we really clone dinosaurs.
T: In theory? Yes. What would you need to do this? A well-preserved source of DNA from the extinct dinosaur, and a could serve as a surrogate mother. In reality? Probably not. It’s not likely that dinosaur DNA could survive undamaged for such a long time. However, scientists have tried to clone species that became extinct more recently, using DNA from well-preserved tissue samples.
More questions about cloning are given in the appendix. The information above is for reference only. Or you can choose several students and ask them to act out a short play whose main topic is as follows:
An old man who was dying left all his fortune to his own son. But the did not know that his son was cloned. So two same young men both claimed that they were the old man’s son. They quarreled and fought with each other; at last they went to the judge. The judge let them check DNA. The result was that their DNA was the same. Now even the judge did not know what to do.
In this part the teacher can give the students some advice to act out. According to this play teacher ask the students several questions:
1. Do you want to be cloned or not? Why?
2. If you are the judge what will you do?
3. Can you tell me the advantages of cloning?
4. And what is the disadvantage?
Discussion
In this part the students will discuss the relationship between the development of technology and social customs.
T: As the technology develops day by day, it has a more and more important influence on the whole society. Technology affects social customs and ethics, sometimes technology may go against the conventional thinking, then comes the problem that whether we should stop the
development of research or change the ethics.
S1: As technology develops in almost every field, a lot of our original customs and ethics changed, either because they are out of time or not so scientific. For example millions of years ago human ate meat of animals without heating them. Later people used fire and no longer ate raw meat and they also used fire to scare dangerous animals.
S2: I think we could not stop the development of technology, for it may develop in the way which is acceptable by social customs.
…
Look at pictures
T: Look at the pictures and discuss which ones are natural clones and which ones are man – made. Then explain how they differ.
S: I think the twins are natural clones and the Dolly sheep is man-made. T: You are right! Can you explain how they differ?
S: The twins were born at the same time, but the Dolly sheep is man-made. T: Anything else? Who want have a try?
S: I think the identical dog is man-made. T: Good Job
Step II Pre-reading
Before class, ask the students to search for some information about this topic. Now show your questions on the screen, and then let them discuss with each other.
T: Now please work in pairs and discuss about cloning. Then list the questions you want to find out. Share your list with your partner.
Ss: Yes, sir / madam. Questions about cloning:
1. What is a clone?
2. How is a clone produced?
3. What benefits can humans gain from cloning?
4. What problems may arise when humans are cloned?
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? After a few minutes.
T: Do you have other questions? Volunteer! S: I have! What is the writer’s opinion?
T: Good job! I think many of you have questions, now let us read the article with the questions.
Suggest answers:
1. It is a way of making an exact copy of another animal and plant.
2. This happens in plants when gardeners take cuttings from growing plants to make new ones, and when small parts of a plant are taken and gown in a laboratory. It also happens in animals when twins identical in sex and appearance are produced from the same original egg.
3. It can help cure disease and can help couples who have no baby to bear a new baby.
4. There may be more bad people like Hitler.
5. In my opinion, I do not agree, for it may cause many moral problems.
6. No. Because cloned human has the same quality as the real human, natural born baby’s quality is higher than his parents.
7. No. The cloned baby also has the disease.
Step III While- reading
Get the students to comprehend the passage quickly and accurately and meanwhile help the students form a good habit of reading.
T: Have you not the answers of your questions? Now please skim the passage fast to obtain a general understanding of the whole passage into several parts and find out the main idea of each part.
Show the following.
Para. 1 Cloning is a way of making an exact copy of another animal and plant. Para. 2 Cloning has two major uses.
Para. 3 The problems of Dolly. Para. 4 The effect of Dolly.
Para. 5 It is forbidden to clone human being.
Step IV Post-reading
Ask the students to read the passage again to finish three tasks.
T: Now let’s listen to them. While listening, pay more attention to the correct pronunciation and tone. Then read the text by yourselves to get the answers to the three tasks. You can work in groups.
T: First, What are the problems or dangers of cloning?
S: Let me have a try! First, the cloned animals have the same illness of old animals and the same goes with the other species. Second, the cloned animals have short life and can cause moral questions.
T: You are right! And what are the advantages of cloning?
S: I know! Firstly, gardeners use it all the time to produce commercial quantities of plants. Secondly, it is valuable for research on new plant species and for medical research on animals. Thirdly, it suddenly opens everyone’s eyes to the possibility of using cloning to cure serious illnesses, and even producing human beings.
T: What is the writer’s opinion? What do you think is the writer’s point of view in this reading passage? Is it in favour of cloning or against is?
S1: I think the writer is in favour of it, because there are many advantages of cloning. It can help people solve many problems in our daily life.
S2: I think the writer doesn’t agree with it, because if the cloning technology can be used in an evil way, it can cause much trouble to our society.
T: The next question: What is your opinion of cloning? Give the reasons.
S1: As a coin has two sides, everything has two aspects. First, if the cloning is used in a correct way it can bring many conveniences to us. Such as: curing serious illnesses and being used to produce commercial qualities of plants. On the other hand, if the cloning is used in an evil way it can cause much troubles: such as moral questions.
S2: My view on cloning and nuclear transfer is that it is ethical. So actually I find no reason to
clone presently. I have this opinion currently, because scientists are unable to successfully clone using nuclear transfer as of today.
S3: I also have a problem with the possible effects of using nuclear transfer on a large scale. This is because I fear that cloning could greatly reduce genetic diversity. I believe if we were to interfere with the genetic diversity of an entire population we would undoubtedly fail.
S4: As you can see I believe cloning using nuclear transfer should not be used on humans for any reason. I think if we were to use cloning it should be closely monitored as to what dangers are involved in having copies of people. I also think this technology should not be used until success. S5: I agree that we should develop cloning. I’m not afraid of cloning Hitlers or excited to clone Einsteins. I would say the time and the environment produced Hitler, not his DNA. So you do not need DNA from Hitler to produce a Hitler. In fact, there are Nazis already present. We should make use of cloning to benefit future generations. You can imagine that how happy the people are if they can recover from the serious illness or get back the son who has just lost his life in an accident by cloning.
T: Good job! Yes, if we our human beings use the scientific technology properly it can bring many advantages to us!
S: Why did Dolly’s appearance raise a storm of objections and have a great impact on the media and public imagination?
T: Because nothing really prepared the world for the 1997 announcement that a group of Scottish scientists had created a cloned sheep named Dolly. Many folks believe that within the next decade, we will hear a more shocking announcement of the first cloned human. Scientists in South Korea have already created human embryonic stem cells through cloning. Until now, the idea of human cloning has only been possible through movie magic, but the natural progression of science is making human cloning a true possibility. We’ve cloned sheep, mice and cows, so why not humans? Some countries have set up laws banning cloning, but it is still legal in many countries. Imagine using a piece of your great-grandmother. This opens the door to many ethical problems, but it’s a door that could soon be opened.
S: So what happens next?
T: Whatever the reasons, the new cloning technologies have sparked many ethical debates among scientists, politicians and the general public. Several governments have considered or enacted
legislation to slow down, limit or ban cloning experiments outright. It is clear that cloning will be a part of our lives in the future, but the course of this technology has yet to be determined. Cloning could cause birth defects, but it’s not going to change society. In the absence of any legislation or regulation, cloning attempts will quietly continue. Eventually, cloning will succeed (if it hasn’t happened already), and humankind will have taken another step down the road of biological engineering. You should study hard today, and you will be able to face this difficult problem and know how to deal with it.
Explanation
T: Now let’s deal with some language points. Turn to page 11. Let’s look at the sentence: It is a way of making an exact copy of another animal and plant. 全句汉语意思:它是一种精确复制另 一个动物或植物的方式。Here a way of means a manner of 一种……的方式。
T: Turn to page 12. Look at the 8th line. Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination. In this sentence, raise means lead. (引起/导 致)。全句意思是：多利的出现引起一场反对风暴，并且对媒体和公众思想产生了很大的冲 击。
T: Turn to page 12. Look at the sentence: However, scientists still wonder whether cloning will
help or harm us and where it is leading us. “whether cloning will help or harm us”, “where it is leading us” is the objects of the word “wonder” 全句意思是：科学家一直致力于研究克隆到底 会有助于我们还是会伤害我们，它们将我们引向何方。
Step V Homework
Ask the students to do the following.
1. Complete the exercises on page 13.
2. Recite the key sentences in the text.
3. What is Cloning? You might not believe it, but there are human clones among us right now. Have you ever wished you could have a clone of yourself to do homework while you hit the skate park or went out with your friends? Imagine if you could really do that. Where would you start?
Unit 2 Cloning Vocabulary and Useful Expressions
Aims:
1. Enable the Ss to grasp the words of cloning.
1. 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 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 relating to commerce” 2) “Engaged in commerce’ eg：a commercial loan; a commercial attaché; a commercial trucker.
4. straightforward adj. 1) “honest’ 2) “easy to understand”
eg: a ~ explanation; written in ~ language; a ~ problem in algebra
5. procedure n.
1) ‘A manner of proceeding; a way of performing or effecting something’ eg：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) to’ eg：undertake oneself to care for an elderly relative.
7. breakthrough n.
1) “An act of overcoming or penetrating an obstacle or restriction.”
2) ‘A military offensive that penetrates an enemy's lines of defense’ eg: a ~ in cancer research
8. disturb v. “break the quiet, calm and peace’
eg: She opened the door quietly so as not to disturb the sleeping boy.
Don’t ~ 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 imposes 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 objecting” 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.
1. moral adj.
1) “Of or concerned with the judgment of the goodness or badness” eg：moral scrutiny; a moral quandary.
2) “Teaching or exhibiting goodness or correctness of character” eg：a moral lesson.
2. 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.
3. forbid v.
1) “To command (someone) not to do something” eg：I forbid you to go.
2) “To command against the doing or use of (something); prohibit” eg：forbid smoking on trains.
Unit 2 Cloning Listening, Speaking and Writing
Teaching Goals:
1. Activate the Ss to show their opinions about the cloning
2. Enable the Ss to write an article on this debate.
3. Let the Ss focus on the different attitude towards cloning technology
4. Teach Ss how to get specific information.
Target Language:
Debate, issue, competition, in charge, topic, argument, reply to , summarize, profitable, donate, existence, embryo, justified, transfer, ethically
I suggest that medical cloning is very important of curing serious illnesses that at present have no cure.
I would like to suggest that medical cloning is not as simple as issue as my colleague claims.
Cloning, attitude, medicine, organ I agree with …
How would you do…? Do you think …?
Teaching important & difficult points:
How to organize the debating materials
How to write a short composition of the debate How to write a report
Teaching methods
Task-based teaching method Listening and cooperative learning
Teaching aids
A computer and a projector
A tape recorder
Step1.Revision
1. Greetings
2. Check the homework and ask the Ss to speak out their opinion about the medical cloning
Step 2 Listening
1. Pre-listening
Work in groups to discuss how we should behave towards the human clones.
“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.
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 donors?
2 While Listening (P54)
The Ss are asked to read fast the question and multiple answers to find out the listening points first, and then listen to the tape twice to choose the best answer.
“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.
“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 oft the important points. After listening twice, check the answers and explain some difficult listening points if necessary.
2 Listening task (p57)
First asks the Ss to read these sentences and then listen to the tape and decide if they are facts or opinions.
“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 pints. Yes? And make notes if necessary. Ok?
Play the recording and 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 3 Speaking task
“Just now, we learned how to organize a debate, now it’s our turn to continue the debate. The topic of our debate is “should we clone?” Now choose the team you agree with.”
Divide the whole class into four groups, two agree and two disagree.
To begin this debate, I’ll give you some information about clone. You can choose what you need. During the speech, you can make notes so that you do not forget what you want to say. In our debate the person who speaks last must summarize your ideas. Here are some tips for you.
Show the following
Center on the subject
Organize main ideas that support your point of view List your own idea
Make a conclusion
Show the following
Why should we use cloning?
Notes for debating: Argument for cloning:
1) Cloning will be beneficial to humans, For example, if a couple can’t have children, cloning could help give them a child;
2) We could use cloning to cure illnesses. Arguments against cloning
1) healthy risks form mutation of genes
2) emotional risks
3) against nature
4) risk of abuse of the technology
5) Cloned animals get ill and die quite young;
6) People are afraid of that scientists will create sands of copies of the same person
7) Cloning is dangerous because scientist may create monsters by mistakes.
Step 4 Writing
Imagine that you are the reporter on a local newspaper and you have been asked to write an article
on this debate. To do this you must mention both sides of the argument. Remember to make a large main heading and then a small heading below it. Write around 250 words. Organize your writing in this way:
Paragraph1: the topic of the debate and who won Paragraph2: the ideas of the winning side Paragraph3: the ideas of the other side
Paragraph4: conclusion and your reaction to the debate, together with any idea you feel they left out.
A sample version:
Should Medical Cloning be Allowed A Debate at Xinhua Middle School
Yesterday there was a very exciting debate at Xinhua Middle School about whether medical cloning should be allowed or not .After a lively discussion a vote was taken and the side arguing for medical cloning won.
The arguments for medical cloning were very strongly put by the team supporting the motion. They argued that serious illnesses and people who w losing their ability to move or think could be helped by medical cloning. They explained that the procedures would be safe, quick and with no problems for the patients. They quoted that 67% of American citizens are for it to support their idea. Their arguments were very convincing.
The arguments put by the team opposing medical cloning were less strong. They argued in two ways. The first reason was that the procedures were not yet secure. Their second reason was that it took many tries and many potential animals had to be killed to produce one useable embryo for research. They explained that man European countries don’t allow medical cloning research
because of this. They quoted Pope John Paul Ⅱ. But their arguments were not so convincing.
At the end of the debate the audience we left with a feeling of hope. They realized that diseases that seem terrible today may be able to be cured soon. Many people were excited and happy when they left they Hall .The writer of this article was among them!
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