英语教学设计 Uni Cloning教学设计（Perio Previewing）.docx

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1、Unit 2 Cloning教学设计(Per iod 1 Prev iewi ng)【教学目标分析】教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的 词汇，初步了解课文以及相关的背景知识，为下一堂课对课文的全面理解起到一 个铺垫作用。教学地位本单元的中心话题是克隆。克隆意为无性繁殖，克隆技术即是无性繁殖 技术。1997年英国罗斯林研究所试验成功的克隆羊多莉是首次利用体细胞克隆 成功的，它在生物工程史上揭开了新的一页。本单元内容具体涉及“什么是克 隆”、“克隆羊多莉是如何诞生的”、“克隆的利弊”等。语言技能和语言知识 都是围绕克隆这一中心话题设计的。目的在于让他们了解有

2、关克隆的知识和 科普文章的一些基本特征和写作方法，自己尝试写简单的辩论报告。【教学方案设计】新课导入建议可以通过让学生看和讨论教材Pio的“热身”(Warming Up)的图片：克隆羊多 莉、人类的双胞胎、草莓的自然无性繁殖以及插枝繁殖的植物等导入新课。要求 学生分组讨论，了解两种不同的克隆：自然克隆和人工克隆。为下面的阅读做好 铺垫。老师要尽量给学生自主学习的时间和空间，通过自学、自做、自悟、自 助等方式，让学生更好地体会和理解文章的内容。教学流程设计导入新课。学生阅读“美文阅读”与“诱思导学”。学生就“话题美文导读”进行讨论，统一答案。学生再次阅读课文(课本第11-12页)并完成“语篇理解

3、”。师生共同讨论并统一答案。让学生快速阅读课文，（见课本第11-12页）并完成“篇章结构”。学生共同讨论，并让学生发表各自见解，最后统一答案。学生再次仔细阅读课文，（课本第11-12页）进行深度理解，并完成“课文 缩写”。老师指导学生讨论，共同找出答案。让学生根据所给出的表格进行自我评估。学生讨论，并让学生代表发表他们讨论得出的答案。老师予以更正。让学生完成“知识初探”部分。老师布置作业，让学生看课本并完成课本第12页1、2、3题，预习学案Period 2,写一篇简单的辩论报告类作文。Unit 2 Cloning课前自主导学(Per i od 1 Prev i ewi ng)【文本感知】I篇章

4、结构阅读Pii-i2的Reading部分，然后完成下列表格Cloning： Where is it leading us?ParagraphMain ideaContents1The definition(定义)of cloningCloning is a way of making an1.another animal or plant. Ithappens both in plants and animals.2The major 2.of cloningFirstly，gardeners use it to produce commercial 3.Secondly, it isvalu

5、able for research on new plant species and for medical research on animals.3The problems of DollyAt first she seemed to develop normally. Then came 4.thatshe had become seriously ill, which5. cloning scientists. Dollylived only six and a half years,6. the life of the originalsheep. Cloning scientist

6、s wondered now to overcome the problems.4The effect of DollyIts appearance raised a storm of7. and had a great impact onmedia and public imagination. It also occurred to people that they can cure serious illnesses and even to produce8. using cloning.Government became9.9.Peoplesreaction to10.Some beg

7、an toresearch into humancloningcloning. Scientists still wonder whether cloning will help or harm us and where it is leading us.【答案】1.exact copy of 2.uses 3.quantities of plants 4. the disturbingnews 5.cast down 6.half the length of 7.objections 8.human beings 9.nervousand more conservative 10.forbi

8、dII语篇理解阅读Pn-i2的Reading部分，选择最佳答案。1. What are people cloning now?A. They are cloning books and machines.B They are cloning humans and animals.C They are cloning trees, crops, grass， flowers， etc.， as well as animals.2. It can be inferred from the passage that a cloned animalA. usually lives as long as

9、 the original oneB. usually lives longer than the original oneC. usually lives shorter than the original one3 The cloning of Dolly the sheep succeeded becauseA. it is easier to clone a sheep than other animalsB the scientists were determined and worked hard with patienceC. it is more useful than pla

10、nts4. From the passage, we can seeA. Dollys original sheep lived 13 yearsB Dollys baby was also a cloned oneC.newspapers did not disclose cloning sheep5.We can use the skill of cloning toA.bring about global peaceB.create other famous scientistsC. cure some special diseases【答案】15 CCB ACm课文缩写Cloning

11、is a way of making an 1.copy of another animal or plant.Cloning plants is 2. while cloning animals is very complicated. It is adifficult task to 3.Many attempts to clone mammals failed. But at last thedetermination and patience of scientists 4.in 1996 with a 5.thecloning of Dolly the sheep. Dollys a

12、ppearance raised storm of 6.and had agreat 7.on the 8.and public imagination. Altogether Dolly livedsix and a half years, half the length of the original sheep.At present some countries began to reform their legal systems and 9.research into human cloning, but other countries like China and the UK,c

13、ontinued to 10.evidence of the abundant medical aid that cloning couldprovide.【答案】1 .exact 2.straightforward 3.undertake 4. paid off 5.breakthrough 6.objections 7.impact 8. media 9.forbade/forbad 10.accumulate【知识初探】I词义搭配1. UndertakeA. to promise or agree to do something2. breakthrough2. breakthrough

14、B. an important newin something you arestudyingstudying3. altogetherC. connected with the principle of what is right andwrong behavior, and with the difference between good and evilD. to get something that you wantobtainobtainE. completelymoralF. to gradually get more and more of sth. over a periodo

15、f time7. forbidG. to order sb. not to do sth. or order that sth. must notbe done8. accumulateH. to say that you disagree with, disapprove of oroppose sth.【答案】l.A 2.B 3.E 4.H 5.D 6.C 7.G 8.FII短语填空in favor of； pay off； object to； from time to time； cast down； differ from； have an impact on1. Jack is r

16、eally having a hard timehe cant earn enough money to the debts.2. At the UN conference, China strongly punishing the Arabiccountries by force.3 The people are muchby many years of civil war.4. Fashion designers are always changing styles of dressto make moremoney from ladies.5. Are youthe government

17、s plan to build more railway lines?【答案】l.pay off 2.objected to 3.cast down 4.from time to time 5.in favor ofm句型背诵1. Cloning plants is straightforward while cloning animals is very complicated. 克隆植物简单，但克隆动物就很复杂了。2. The fact that_she snemed to develop normally was very encouraging.看来多莉是在正常地成长着，这很令人鼓舞。

18、3. Then_came the disturbing news that Dolly had become seriously ill.接着传来 了多莉病重的坏消息。4. Although at present human egg cells and embryos needed for cloning research are difficult to obtain, newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions.尽管目前供克隆研究的人类的卵细胞和胚胎很难获得，报

19、纸报道说，有些邪恶头目希望把自己克隆出来以实现他们的野心。【美文阅读】Pandas can be saved by cloning?从1998年中国科学院动物研究所首席科学家、动物克隆与受精生物学学科 带头人陈大元首次正式提出克隆大熊猫到现在，整整16年过去了，陈老仍然执 著于此。然而保护大熊猫，究竟要不要通过克隆的方式呢？China has been exploring every possible means of saving giant pandas, one of the worlds most endangered species, from becoming extinct, e

20、ven if it means resorting to（诉诸）cloning them.Chen Dayuan, a senior scientist who specializes in cloning at the Institute of Zoology in the Chinese Academy of Sciences, introduced the idea of performing cloning techniques on giant pandas in 1998.Using initial funding of 100,000 yuan , Chen successful

21、ly produced blastocysts（胚泡）by transplanting the somatic nucleus from sample pandas into the egg cells of rabbits.The move was considered as one of the 10 biggest achievements of science and technology in 1999.lt won an award of 6 million yuan and further funding of 5 million yuan for the project fro

22、m the Ministry of Science and Technology.At first, two embryos were created from a surrogate mother（代母）cat who became pregnant after being in-jected with a blastocyst, but the experiment was abandoned after the cat died.Chen and his team then experimented with surrogacy on black bears. After three y

23、ears of effort, a black bear became pregnant and the shape of a fetus（|台儿）could be seen on an ultrasound scan（超声波扫描检查）.However, the research was stopped in 2005 because the fetus did not completely develop before the projects deadline.“Those who are against cloning have made their voices heard throu

24、ghout the research project on cloning giant pandas. Some people believe cloning goes against nature, but it is actually a pioneering technology. If successful, it is a way to save endangered animals. Chen said.Some scientists take a different view. While I agree that research on cloning is meaningfu

25、l, it is inappropriate to use giant pandas in this type of experiment. The number of pandas is limited and human beings have yet to master knowledge about pandas* pregnancy. Cloning would do little to save the species, said Wang Dajun, a researcher at the School of Life Sciences, Peking University.In response, Chen said that he would continue his research.【诱思导学】1. Do you think pandas can be saved by cloning? Why?【答案】省略2. Why are some scientists against cloning pandas?答案】 Because they think cloning go against nature.