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选修8 Unit 2 Cloning-ReadingCLONING: WHERE IS IT LEADING US?Cloning has always been with us and is here to stay. It is a way of making an exact copy of another animal or plant. It happens in plants 1. gardeners take cuttings from growing plants to make new ones. It also happens in animals when twins identical in sex and appearance 2. (produce) from the same original egg. The fact is 3. these are both examples of natural clones.Cloning has two major uses. Firstly, gardeners use it all the time to produce 3. ___________ (commence) quantities of plants. Secondly, it is valuable for research on new plant species and for medical research on animals. Cloning plants is straightforward while cloning animals is very complicated. It is a difficult task 4. ___________ (undertake). Many attempts to clone mammals failed. But at last the 5. ___________ (determine) and patience of the scientists paid 6. in 1996 with a ___________ (突破)- the cloning of Dolly the sheep. The procedure works like this: On the one hand, the whole 7. (science) world followed the progress of the first successful clone, Dolly the sheep. The fact that she seemed to develop normally was very 8. (encourage). Then came the disturbing news that Dolly 9. (become) seriously ill. Cloning scientists 10. (cast) down to find that Dolly's illnesses were more appropriate 11. a much older animal. Altogether Dolly lived six and a half years, half the 12. (long) of the life of the original sheep. 13. (sad) the same arbitrary fate affected other species, such as cloned mice. The questions that 14. (concern) all scientists were: "Would this be a major difficulty for all cloned animals? Would it happen forever? Could it 15. (solve) if corrections were made in their research procedure?"On the other hand, Dolly's appearance raised a storm of 16. (object) and had a great impact on the media and public imagination. It became controversial. It suddenly opened everybody's eyes to 17. possibility of using cloning to cure serious illnesses and even 18. (produce) human beings.Although at present human egg cells and embryos 19. (need) for cloning research are difficult to (获得), newspapers wrote of evil leaders hoping to clone themselves to ________ _________ ___________ (实现他们的野心). Religious leaders also raised (道德的) questions. Governments became nervous and more (保守的). Some began to reform their legal systems and 20. (forbid) research into human cloning, but other countries like China and the UK, continued to ___________ ___________ (积累证据) of the abundant medical aid that cloning could provide. However, scientists still wonder 21. ____________ cloning will help or harm us and where it is leading us.THE RETURN OF THE DINOSAURS?The possibility of cloning fierce and extinct wild animals has always excited film makers. And they are not the only ones! The 1. (popular) of films such as Jurassic Park, 2. which a scientist clones several kinds of extinct dinosaurs, proves how the idea 3. (strike) a mixture of fear and excitement 4. ________ people's hearts. But in fact we are a long way 5. being able to clone extinct animals. Scientists are still experimenting 6. cloning mammals. This is because the cloning of mammals is still a new science and its story only began seriously in the 1950s as this list shows:1950s cloning of frogs 1996 first clone of a mammal: Dolly the sheep 1970s research using the embryos of mice 2000 cow gave birth to a bison1979 work on embryos of sheep and mice 2001 China's first cloned twin calves 1981 first experimental clones of mice 2002 first cloned cats1983 first experimental clones of cows 2005 first cloned dog________ ________ _______ _______ (不时) people suggest that extinct animals like dinosaurs, can 7. (possible) be brought back to life through cloning. Unfortunately, with what we know now, this is either impossible or 8. _____________ (suit). There are many reasons.◎The (最初的) requirement is that you need perfect DNA (which gives information for how cells are to grow).◎All efforts of cloning an animal will be ______ _______ (徒劳) if there is not enough diversity in the group 9. (overcome) illnesses. Diversity in a group means 10. (have) animals with their genes arranged in different ways. The advantage is that 11. there is a new illness some of these animals may die, but others will survive and pass 12. the ability 13. (resist) that disease to the next generation. 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 14. (leave) to continue the species. ◎It would be unfair to clone any extinct animals if they were to live in a zoo. A suitable habitat would be needed for them to lead a natural life.15. (base) on what we know now, you cannot clone animals that have been extinct longer than 10,000 years. Actually, dinosaurs disappeared 65,000,000years ago. So the chance of dinosaurs ever returning to the earth is (mere) a dream.选修8 Unit 2 Cloning-ReadingCLONING: WHERE IS IT LEADING US?Cloning has always been with us and is here to stay. It is a way of making an exact copy of another animal or plant. It happens in plants 1. when gardeners take cuttings from growing plants to make new ones. It also happens in animals when twins identical in sex and appearance 2. are produced (produce) from the same original egg. The fact is 3. that these are both examples of natural clones.Cloning has two major uses. Firstly, gardeners use it all the time to produce 3. commercial (commence) quantities of plants. Secondly, it is valuable for research on new plant species and for medical research on animals. Cloning plants is straightforward while cloning animals is very complicated. It is a difficult task 4. to undertake (undertake). Many attempts to clone mammals failed. But at last the 5.determination (determine) and patience of the scientists paid 6. off in 1996 with a breakthrough (突破)- the cloning of Dolly the sheep. The procedure works like this: On the one hand, the whole 7. scientific (science) world followed the progress of the first successful clone, Dolly the sheep. The fact that she seemed to develop normally was very 8. encouraging (encourage). Then came the disturbing news that Dolly 9. had become (become) seriously ill. Cloning scientists 10. were cast (cast) down to find that Dolly's illnesses were more appropriate 11. to a much older animal. Altogether Dolly lived six and a half years, half the 12. length (long) of the life of the original sheep. 13. Sadly (sad) the same arbitrary fate affected other species, such as cloned mice. The questions that 14. concerned (concern) all scientists were: "Would this be a major difficulty for all cloned animals? Would it happen forever? Could it 15. be solved (solve) if corrections were made in their research procedure?"On the other hand, Dolly's appearance raised a storm of 16. objections (object) and had a great impact on the media and public imagination. It became controversial. It suddenly opened everybody's eyes to 17. the possibility of using cloning to cure serious illnesses and even 18. to produce (produce) human beings.Although at present human egg cells and embryos 19. needed (need) for cloning research are difficult to obtain (获得), newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions (实现他们的野心). Religious leaders also raised moral (道德的) questions. Governments became nervous and more conservative (保守的). Some began to reform their legal systems and 20. forbade (forbid) research into human cloning, but other countries like China and the UK, continued to accumulate evidence (积累证据) of the abundant medical aid that cloning could provide. However, scientists still wonder 21. whether cloning will help or harm us and where it is leading us.THE RETURN OF THE DINOSAURS?The possibility of cloning fierce and extinct wild animals has always excited film makers. And they are not the only ones! The 1. popularity (popular) of films such as Jurassic Park, 2. in which a scientist clones several kinds of extinct dinosaurs, proves how the idea 3. struck (strike) a mixture of fear and excitement 4. into people's hearts. But in fact we are a long way 5. from being able to clone extinct animals. Scientists are still experimenting 6. with cloning mammals. This is because the cloning of mammals is still a new science and its story only began seriously in the 1950s as this list shows:1950s cloning of frogs 1996 first clone of a mammal: Dolly the sheep 1970s research using the embryos of mice 2000 cow gave birth to a bison1979 work on embryos of sheep and mice 2001 China's first cloned twin calves 1981 first experimental clones of mice 2002 first cloned cats1983 first experimental clones of cows 2005 first cloned dogFrom time to time (不时) people suggest that extinct animals like dinosaurs, can 7. possibly (possible) be brought back to life through cloning. Unfortunately, with what we know now, this is either impossible or 8.unsuitable (suit). There are many reasons.◎The initial (最初的) requirement is that you need perfect DNA (which gives information for how cells are to grow).◎All efforts of cloning an animal will be in vain (徒劳) if there is not enough diversity in the group 9. to overcome (overcome) illnesses. Diversity in a group means 10. having (have) animals with their genes arranged in different ways. The advantage is that 11. if there is a new illness some of these animals may die, but others will survive and pass 12. on the ability 13. to resist (resist) that disease to the next generation. 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 14. be left (leave) to continue the species.◎It would be unfair to clone any extinct animals if they were to live in a zoo. Asuitable habitat would be needed for them to lead a natural life.15. Based (base) on what we know now, you cannot clone animals that have been extinct longer than 10,000 years. Actually, dinosaurs disappeared 65,000,000 years ago. So the chance of dinosaurs ever returning to the earth is merely (mere) a dream.。
Book8 Unit2 CloningPeriod 1 Reading在英语教学中“阅读理解能力”是学生从阅读中获取信息的能力以及对文章理解的速度和准确性的关键因素。
培养学生的阅读能力是课文阅读教学的主要目标，同时还要注意培养学生在阅读过程中获取和处理信息的能力，让学生学会利用相关的英语知识去解读英语阅读材料。
本节课是一节阅读课，设计过程如下：导入引出克隆这一话题 --- 通过略读掌握段落大意，文章结构( read for structure )--- 通过精读了解文章细节信息( read for information )--- 通过对细节的推理学会猜测词义和推断作者立场态度 ( read for reference ) --- 通过整合信息，以高考语法填空的题型小结课文内容( read for consolidation ) ---独立思考后合作讨论( read for critical thinking ) --- 课后作业(写作拓展)。
教材里本单元内容，语言技能和语言知识都是围绕“克隆”这一中心话题设计的。
具体涉及“什么是克隆” , “克隆羊多利是如何诞生的”，“克隆的利与弊”等。
教师可在充分利用教材资源的基础上，结合学生的实际情况设计教学活动，旨在帮助学生有效地掌握阅读技巧，形成有效地学习方法和阅读策略，同时了解说明文篇章结构和写作特点，为下一步进行议论文的写作教学做好准备。
目标聚焦一、知识点初步理解、掌握克隆意为无性繁殖，克隆技术即为无性繁殖技术。
学习课文中关于克隆这一新生物技术的有关知识，学习分析课文中的长难句子，初步感知课文中出现的的本单元要学的语法现象。
二、能力点1、能理解文章主旨大意，获取信息、处理信息、进行推理判断和表达的能力。
2、形成分析篇章结构的能力，提升逻辑思维能力3、学会增加语言的输出量，提高语言表达能力。
4、能利用上下文猜测生词词义三、兴趣点 1、利用已获取的信息发表自己对进行人类克隆问题的看法。
English learning Plan of Senior 2（导学案）The wish words of teacher's（教师寄语）：Relax! Be patient and enjoy yourself. Learning foreign languages should be fun. (放松点！要有耐性，并让自己快乐！学习外语应该是乐趣无穷的。
）㈠Teaching aims(学习目标)1.Knowledge aims（知识目标）⑴To learn about cloning by reading.⑵.To master and understand some structures and complex sentences.2.Ability aims（技能目标）⑴. Read passages by using different reading skills (skimming﹑scanning﹑careful reading) .⑵. Express own opinions about cloning in form of debate..3.Emotion aims（情感目标）⑴Be interested in science technology (cloning).⑵. Learn to team up with others.㈡Special and difficult Points(学习重难点)1. Learn different reading skills(Skimming, scanning﹠careful reading).2 Learn more about cloning.3. Describe cloning in your own words.㈢The procedure of learning （学习过程）Before class (课前预习胸有成竹)【自主预习】㈠学法指导⑴通读本篇文章，查字典，猜生词，记短语，勾出文中复合句以及难句。
Unit2 克隆：它将把我们引向何方？克隆一直与我们同在，而如今它还要持续下去。
这是一种用来生产与原型完全相同的动植物的方法。
当园艺师从生长着的植物上剪下枝条来培植新植物时，就会产生这种现象。
这种现象也发生在动物身上，从同一个原生卵子产生性别和相貌相同的双胞胎也是克隆。
实际上，这些都是自然克隆现象。
克隆技术有两大用途。
第一，园艺师一直用它生产大量的供商用的植物；第二，它在对新植物物种的研究以及对动物的医学研究方面都是很有价值的。
克隆植物简单，但克隆动物就比较复杂了，是一项很难完成的任务。
克隆哺乳动物的多次尝试都失败了。
但是，科学家的决心和耐心最终得到了回报，这就是1996年具有突破性的克隆羊“多莉”的诞生。
它的程序如下图所示：1．母羊(A)提供一个卵细胞。
2．在卵细胞中取出细胞核。
3．卵细胞准备接受新的细胞核。
4．母羊(B)提供一个供克隆的躯干细胞。
该细胞核应包含生产一头新羊所需要的全部基因。
5．取出该细胞的细胞核。
6．用电把母羊(B)的躯干细胞核和母羊(A)的卵细胞结合起来。
7．细胞分裂并生长成胚胎。
8．把胚胎植入另外一头母羊(C)体内，母羊(C)就是克隆羊的代孕者。
9．这头小羔羊就是母羊(B)所提，供的细胞核克隆而成的。
一方面，整个科学界都在关注着首例成功的克隆动物多莉羊的成长¨多莉看来是在正常地成长着，这很令人鼓舞。
接着传来了多莉病重的坏消息。
研究克隆的科学家发现多莉得的病更容易发生在年老的羊身上．这让他们很沮丧。
多莉总共只存活了六年半，这是它的原型羊寿命的一半。
可悲的是，同样无法控制的命运也在影响着其他物种，如克隆鼠。
科学家的脑海里产生的问题是：“这是不是所有克隆动物的一个主要困难呢？这种现象会不会永远发生？如果改进程序，问题会不会解决？另一方面，多莉的出生引起了一阵强烈的反对，对媒体和公众的想象力也产生了巨大的影响。
它引起了争议，因为它突然打开了人们的眼界，看到了有可能：用克隆技术来治疗重病，甚至克隆出人类。
人教版高中英语选修8Unit2《Cloning》word教案【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，陈老仍旧执著于此。
然而爱护大熊猫，怎么说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 world's most endangered species，from becoming extinct，even 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 successfully 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.It won an award of 6 million yuan and further funding of 5 million yuan for the project from the Ministry of Science and Technology.At first，two embryos were created from a surrogate mother(代母) cat who became pregnant after being injected 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 years of effort，a black bear became pregnant and the shape of a fetus(胎儿) 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 project's deadline.“Those who are against cloning have made their voice s heard throughout 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 tosave endangered animals，”Chen said.Some scientists take a different vie w.“While I agree that research on cloning is meaningful，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.Period ⅠPreviewing(教师用书独具)●教学目标本课时要紧是通过学生对学案所给出的内容的学习，了解本课文中所显现的词汇，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明白得起到一个铺垫作用。
Module 8 Unit 2 CloningCloning：Where Is It Leading Us？(Warming up & Comprehending & Language points)Class: ______ No.___ Group: ___ Name:_________ 组内评价：___ 教师评价：___【Learning Aims】1. To improve the ability of grasping the main idea andfinding key information.2. To enable the students to talk about cloning and helpthem to have a good and correct knowledge of cloning.3. To learn key words and phrases in the passage.Warming up【自主学习】Task 1: Warming up1.What is cloning?Cloning is a way of making an ________ ______ of another animal or plant.2. Do you know how natural clones and man-made clones differ?A _______________ is one that occurs in nature.A _______________ is one that is produced through human intervention(人类介入).3. What benefits can humans gain from cloning?________________________________________________________________________________________________________________________________ComprehendingTask I Fast reading1.Skim the passage and get the main idea of each paragraph.Para 1: The ________________of cloningPara 2: The two _______ _______ and ______________ of cloningPara 3: The ______________ ofDollyPara 4: The ______________ ofDollyPara 5: People’s __________ to cloning2. Sum up the main idea of the text.The passage tells us that animal cloning raised _____________ and scientists are not sure about its ___________.Study the procedure of cloning Dolly the sheep carefully, and then give the order of the procedure.A) Match the following the egg cell the nucleus the somatic cell the embryoTask III Inquiry reading What do you think is the writer ’s point of view in this reading passage? Is it in favour of cloning or against it? I think the writer is__________________because ____________________________Task IV Translate the following sentences into Chinese orally and try to recite them.1. (L7,P11) Cloning plants is straightforward while cloning animals is very complicated.2. (L12,P11) The fact that she seemed to develop normally was very encouraging.3. (L12,P11) Then came the disturbing news that Dolly had become seriously ill.4. (L28,P12) However, scientists still wonder whether cloning will help or harm us and where it is leading us.5. (Ex 2 L10,P14) Scientists believe human cloning is just a matter of time but the assumption that human cloneshave already been born hasn ’t been proved yet.Task IV RetellingFill in the blanks with the proper words.Cloning is a way of 1 an exact copy of another animal or plant. It has two 2 uses. One isthat gardeners use it to produce 3 quantities of plants. The other is that it is 4 for research onnew species and for medical research on animals. Cloning plants is 5 while the cloning of animals ismore complicated. The process of cloning is difficult to 6 . Many attempts to clone mammals failed.The first successful clone, Dolly the sheep, made the whole 7 world follow its process, though it hadmore problems than the normal sheep. On the other hand, Dolly ’s appearance raised a storm of 8and had a great 9 on the media and public imagination. Different people have different opinions of it.However, scientists still 10 whether cloning will help or harm us and where it is leading us.Language points细胞核 胚胎 卵细胞 体细胞 B) Choose the right order of the events given during the cloning procedure of Dolly the sheep . a. Female sheep C bears the embryo . b.The nucleus from sheep B and egg cell from sheep A join together. c.Female sheep B provides a somatic cell whose nucleus is taken out of d. The cell break up and grows into an embryo e. Female sheep A provides an egg cell whose nucleus is removed from. f. A lamb called Dolly is cloned. A. e, c, a, b, d, f B. e, a, c, d, f C. e, c, b, d ,a, f D. e, b, c, d, a, f1.有区别v.___________；差异n.___________；不一样的adj._____________2.宾语，物体n.___________；反对，抗议v.___________；反对n.___________；客观的adj.____________3.修改，纠正v.___________；改正，纠正n._____________；正确的，得体的adj.___________；不准确的adj._____________4.法规，条例n.___________；有规律的，规则的，定期的adj.___________不规则的adj.___________5.商业，贸易n.___________；商业的，贸易的adj._____________6.假定，设想v.___________；假定，设想n._______________7. 积累，聚积v.____________；积累，聚积n._______________TaskII Translate the following phrases into English and try to recite them.1. 扎根，留传下去________________2. 同一原生卵子___________________3. 得到好结果；偿清______________4.一方面________________________5. 另一方面_____________________6. 使心烦意乱；气馁，沮丧___________7.适合于，适当___________________8.引起一阵强烈的反对______________9.对……产生极大的影响_____________________________________10.实现野心____________________ 11.提出道德问题___________________ 12.收集……的证据______________ 13.赞成___________________________ 14. 一定；注定__________________ 15.反对___________________________Task III Key words and phrases 【合作探究学习】1.It is a difficult task to undertake. (L8) 动物克隆是一项难以施行的任务。
英语选修8人教版新课标Unit 2阅读教案Unit 2 Cloning: Where isit leading us?中国书法艺术说课教案今天我要说课的题目是中国书法艺术，下面我将从教材分析、教学方法、教学过程、课堂评价四个方面对这堂课进行设计。
一、教材分析：本节课讲的是中国书法艺术主要是为了提高学生对书法基础知识的掌握，让学生开始对书法的入门学习有一定了解。
书法作为中国特有的一门线条艺术，在书写中与笔、墨、纸、砚相得益彰，是中国人民勤劳智慧的结晶，是举世公认的艺术奇葩。
早在5000年以前的甲骨文就初露端倪，书法从文字产生到形成文字的书写体系，几经变革创造了多种体式的书写艺术。
1、教学目标：使学生了解书法的发展史概况和特点及书法的总体情况，通过分析代表作品，获得如何欣赏书法作品的知识，并能作简单的书法练习。
2、教学重点与难点：（一）教学重点了解中国书法的基础知识，掌握其基本特点，进行大量的书法练习。
（二）教学难点：如何感受、认识书法作品中的线条美、结构美、气韵美。
3、教具准备：粉笔，钢笔，书写纸等。
4、课时：一课时二、教学方法：要让学生在教学过程中有所收获，并达到一定的教学目标，在本节课的教学中，我将采用欣赏法、讲授法、练习法来设计本节课。
（1）欣赏法：通过幻灯片让学生欣赏大量优秀的书法作品，使学生对书法产生浓厚的兴趣。
（2）讲授法：讲解书法文字的发展简史，和形式特征，让学生对书法作进一步的了解和认识，通过对书法理论的了解，更深刻的认识书法，从而为以后的书法练习作重要铺垫！（3）练习法：为了使学生充分了解、认识书法名家名作的书法功底和技巧，请学生进行局部临摹练习。
三、教学过程：（一）组织教学让学生准备好上课用的工具，如钢笔，书与纸等;做好上课准备，以便在以下的教学过程中有一个良好的学习气氛。
（二）引入新课，通过对上节课所学知识的总结，让学生认识到学习书法的意义和重要性！（三）讲授新课1、在讲授新课之前，通过大量幻灯片让学生欣赏一些优秀的书法作品，使学生对书法产生浓厚的兴趣。
Unit 2 Cloning【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 world's most endangered species，from becoming extinct，even 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 successfully 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.It won an award of 6 million yuan and further funding of 5 million yuan for the project from the Ministry of Science and Technology.At first，two embryos were created from a surrogate mother(代母) cat who became pregnant after bei ng injected 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 years of effort，a black bear became pregnant and the shape of a fetus(胎儿) 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 project's deadline.“Those who are against cloning have made their voices heard throughout 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 meaningful，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.Period ⅠPreviewing(教师用书独具)●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。
优质课教学教案（选修八第二单元）Topic Unit 2 Reading Cloning: where is it leading us?Teaching aims 1. Knowledge aim: Explain how cloning works in mammals.2. Ability aim: Find out the main idea of each paragraph.3. Emotional aim: Some of the issues that arise from this and whether it is necessary to let cloning exist.Key points 1. Find out the main idea of each paragraph.2. Judge what natural clone is and what man-made clone is.Difficult points 1. Explain how cloning works in mammals.2. Discuss the problems and advantages of cloning.Teaching aids: 1. A projector 2. A tape recorder 3. Multimedia 4. The blackboardTeaching methods 1. Question-and-answer teaching method2. Watch-and-listen activity3. Free discussion methodTeaching stepsTeacher Students PurposeStep I lead-inShow picture on thescreen, ask the student toanswer my questions.Step II Warming upGive the definition ofnatural clone and man-madeclone, and then show thepictures on the screen.Step III ReadingPlay the radio; show thequestions to the students.Step IV Intensive readingGive them a topic to findthe problems and advantagesof clone.Step V DiscussionPut forward a question:which is easier to clone, plantor animal? And then explainwhy so.Talk about the pictures,pay attention to wordclone.Judge what naturalclone is and whatman-made clone is.Find out the main ideaof each paragraph, andanswer the questions.Fill in the chart on Page12 using the informationfrom the text.Look carefully at thescreen and know moreabout the procedures ofcloning.Lead in the topic of thisperiod--cloning.Let students know what theywill learn in the text.Learn to analyze the wholetext and get more informationof clone.To do an intensive readingand check whether theycomprehend the whole text.Explain how cloning worksin mammals.(Take Dolly the sheep forexample. )Homework 1. Translate the procedure of cloning Dolly the sheep into Chinese.2. Finish Ex.1, 2, 3, Page12.Blackboard designUnit 2 cloningReading Cloning: where is it leading us?Natural problem/dangers advantages Clone become ill cure illnesses Man-made die younger commercial uses an egg cell more evil leaders save endangered animals an somatic cell raise moral questions medical research an embryothe donated cellEvaluation。
