Unit 2 Cloning Reading 教学设计--高中英语人教新课标选修八.docx

英语教学设计一教材分析1.教学内容本单元的中心话题是“克隆”，学生通过讨论和阅读有关克隆的内容，了解克隆的含义、克隆的技术发展、克隆对人类带来的好处以及人类对克隆这一问题的争议。阅读部分介绍了植物与动物克隆的区别、多莉羊的诞生与死亡以及由此引发的争论。帮助学生进一步认识克隆的意义在于解决医学上的难题，为人类服务。1. 教材处理本科结合教材的实际对教材内容、编排顺序等进行了调 整、删除和补充，把阅读前、阅读中和阅读后三部分有机整和起来。(1) 导入新颖，激发兴趣。“读前阶段”通过图片导入的形式，激活学生大脑中的图式。同时，结合标题预测，使学生对即将阅读的内容有一定的预测，激发阅读兴趣。(2) 循序渐进、创意安排。 “读中阶段”引导学生进行语篇的整体感知， 了解课文的概况； 培养学生同义转换及归纳概括的能力。(3) 适度拓展、开发思维。 “读后阶段”拓展学生的发散性思维，在训练学生阅读技能的基础上了解克隆这门生物技术以及有关的争议。二 teaching goals（教学目标）1. targetlanguage （目标语言）a. important words and expressionsclone,commercial,producer,undertake,arbitrary, object, forbid, accumulate, cast down, object to,the media, in favour ofb. important sentences1) but at last the determination and patience of the scientists paid off in1996 with a breakthrough-the cloning of dolly the sheep.2) altogetherdollylivedsixanda halfyears, half the length of the life of the original sheep.3) the fact that she seemed to develop normallywas very encouraging.4) then came the disturbing news that dolly had become seriously ill.2. ability goals（能力目标）enablethestudentstodescribecloning:whatisthe advantages of cloning? what is the problems ordangersofcloning?whatisyouropinionofcloning?3. learning ability goals（学能目标）help the students learn how to describe cloning.三 teaching important points（教学重点）how to describe cloning.四 teaching difficult（教学难点）helpthestudentsanalyzethewritingtechniquesofthe article.五 teaching methods（教学方法）skimming, task-based method and debate method.六 teaching aids（教具准备）a recorder, a projector and some slides.teaching procedures & ways step lead-in 设计意图 导入部分由两个步骤组成：1. 首先让学生观看有关克隆动物和植物的图片。通过图片，学生们立刻领悟了本课的主题，并带着兴趣开始观看。2. 学生在体验中产生探究的兴趣后，为了启发学生思考，设计了四个问题，以激发学生的思维。teacher:in pairs, look at these pictures and discuss which ones are natural clones and whichones are man-made. think about how they differ.student:Ithinkthetwinsand a strawberryplantare natural clones; the dolly sheep and growing new plants are man-made.after several minutes, teacher ask some questions andlet students answer these questions.teacher: 1. dolly the sheep. It s the most famous sheep intheworld.do you know how dollyis different from other sheep?student:she was cloned while the others were born naturally. it is the copy of another sheep.teacher:2.what can you see in the picture?student:I can see a strawberry plant producing runners in a natural form of cloning.teacher: 3. who cut the stem off the plant?student:a gardener.and thegardenerisgoing to put it into a pot to produce another plant.he is actually making a copy of the plant. teacher: 4.what do you know about twins?student:there are twins of the same sex and those of different sexes. the twins here areidentical in sex and appearance and are goodexamplesofnaturalclones.theycarrythesame genetic information. the fertilized egg hassplit into two while inside the mother, and soproduced two identical human babies. steppre-reading 设计意图 通过阅读文章标题，引导学生对课文内容进行预测，调动学生已有的背景知识，使其产生阅读的兴趣，快速进入阅读状态。然后让学生通过快速阅读来验证自己的预测，使自身处于一种主动认知的状态。before class, ask the students to search for some information about this topic. now show myquestionson thescreen,and thenletthem discusswitheach other.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? suggest answers:1. a clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it.2. thecloningofplantsissimpleand relativityeasy.it can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). the cloning of animals is more complicated. it was not achieved until 1996 and is fully explained in the first reading.3. 1)medicalcloningcan helpcureseriousillnesses thatruinone squalityoflife(suchas parkinson s disease帕金森症or alzheimer s disease老年痴呆症).2) it can help infertile people have babies.4. 1) people may want to clone themselves so they can live forever.2) people may want to clone dead children.3) people may want to clone their favorite pets. stepwhile-readingteacher:now let s listen to the tape. then iwill give you 20 minutes to read this passageagain. while reading , you should finish the following three tasks.task 1summarize the main idea of each paragraph. 设计意图 学生通过略读本文，快速找出每段的主题句，从整体上把握文章内容，不但了解此类型文章的篇章结构，学习此类型文章的写作，而且便于下一步查读。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 birth and death of dolly. para 4. the effect of dolly.para 5. it is forbidden to clone human beings.task 2read the text carefully and fill in the blanks. 设计意图 学生个人先通过查读，快速找到特定信息，然后小组组员之间交流各自的答案，有疑义的地方，经过讨论，最终确定答案。这不仅让学生了解文章的具体内容，而且培养学生阅读的能力和互帮互助的团队合作精神。definition cloning is a way of makingan exact copyof another animal and plant.majoruses of cloning gardeners use it toproducecommercial quantities of plants. itisvaluableforresearchon new plantspecies and formedicalresearch on animals.about dolly the sheep encouraging news: dolly seemed to developnormally. disturbing news: dolly lived only six and a half years, half the length of the life oftheoriginalsheep,becauseofseriousillnesses which were more appropriate to amuch older animal.different opinions on cloning evilleadershoped toclonethemselvestoattain their ambitions. religious leaders raisedmoralquestions. some governmentsforbaderesearch into human cloning but other countries like china and theuk, continued to accumulate of theabundantevidencemedicalaidthatcloningcould provide.task 3choose the best answer. 设计意图 在阅读的过程中，让学生结合文章对这些问题进行思考。一方面，可以培养学生的综合阅读能力，另一方面， 加强学生对文章的进一步理解。1). the main idea of the text is a. animalcloningisveryvaluableand can benefittheworld.b. animal cloning could be misused by bad people so it must be forbiddenc. animalcloningiswelldevelopedbecausedolly the sheep wasborn.d. animal cloning raised arguments and scientists are not sure about its future.2). isusedintheprocedureforcloningdollythe sheep.a. the nucleus of sheep ab. the somatic cell of sheep ac. the nucleus of sheep bd. the embryo of sheep c3). the cloning of dolly the sheep succeeded because .a. its easier to clone a sheep than other animalsb. the scientists were determined and worked hard with patiencec. thescientistswererewardedand gotlotsofmoneyd. many other attempts to clone mammals failed4). the lamb is the clone of the cell from sheep because .a. it provides the eggcellb. it gives birth to thelambc.itprovidesthenucleusd.itis a female sheep5). dolly the sheep-.a. looked exactly like the sheep that provides the eggb. was the exact copy of the sheep that provides the nucleusc. looked like the sheep that gave birth to itd. had the characteristics of all three sheep6). it can be inferred from the passage that a cloned animal-.a. usually lives as long as the original oneb. usually lives longer than the original onec. usually dies earlier than the original oned. is usually as healthy as the original one 7). which of the following is wrong?a. cloned people would live forever.b. clonedpeoplemay be killedatwillformedicalaid.c. a woman would have difficulty recognizing her real husband.d. men will die out because a woman can give birth toa baby without a husband8). the sheep that donated the somatic cell most probably lived years.a. 3b. 6c. 12d.139). which of the following is not an advantage of cloning?a. cloning can be used for medical purposes.b. largequantitiesoffoodcan be producedbycloning.c. famouspersonswho havepassedaway can be cloned.d. cloningcan helpkeep animalsfrombecomingextinct. 10). in the second paragraph, the word“ straightforward” means .a. uncomplicatedb. honestc.frankd. difficult steppost-reading 设计意图 学生已经通过略读、查读和细读，抓住了文章脉络，理解了文章内容。在此基础上，要求更深一步理解文章，因此设计了几道习题，进一步培养和考察学生的阅读理解能力。exercise 1 the following statements are about cloning. read them and decide if they are trueorfalse.writetheletter“ t ”ifthestatement is true. write“ f ” if it is false.1). cloning means making a copy of an animal or a plant.(f)2). gardeners can make a lot of money by cloning plants.(t)3). cloning animals is as complicated as cloning plants.(f)4). dolly the sheep was the first successful clone of a mammal.(t)5). natural clones happen in animals as well as inplants.(t)exercise 2read the passage again and answer these questions.1). what are the two major uses of cloning?2). why is it easier to make commercial plant clones than animal clones?3). what was the first clone from an adult animal? at what age did this clone die?4). why is cloning controversial in some countries? steplanguage points 设计意图 使学生理解和掌握一些重点词汇的用法，进一步培养使用英语语言的能力，并加深对文章的理解。1. identicaladj .( 常与 with连用 )完全相同的eg.these two designs are almost identical. my opinion is identical with his.还有“同一的，同样的”的意思eg.we are identical in our views of what should be done.2. cast down:feeling unhappy and depressed( 多用于被动结构或做表语)沮丧；低沉。eg.he was much cast down by the failure of the experiment.anyonewouldbe castdown by news suchas that.3. forbidvt. 词义 vt.(to command someone not to do something)禁止, 不准 常用搭配 forbid sth/doing sth禁止( 做) 某事 forbid sb to do sth禁止某人做某事forbidthat禁止 反义词 allow允许, 准许allow sth/doing sth允许( 做) 某事allow sb to do sth允许某人做某事eg.the law forbids the sale of cigarettes to people under the age of 16.the law forbids building on this land.4. accumulate?vt.收集，堆集eg.he accumulated fortune by hard work.the purpose of education is not just accumulating information.?vi.eg.dust accumulated during my absence.归纳拓展：accumulate可作及物动词和不及物动词，表示:收集,聚集 ,堆积。另外 accumulationn.积聚如: the accumulation of knowledge知识的积聚stephomework 设计意图 受课堂时间的限制，学生对课文的理解有限，因此布置学生课后再阅读课文，并且让学生对克隆这一现象进行评价，归纳出克隆的好处以及克隆存在的问题和危险。1. what are the advantages and disadvantages of cloning?2. complete the exercises on page 13.学科网（北京）股份有限公司