Unit2Cloning教案

Unit2CloningⅠ.单元教学目标技能目标SkillGoals▲Talkaboutcloning▲Practiceexpressingandsupportinganopinion▲Usetheappositiveclause▲WriteacompositionaboutcloningⅡ.目标语言功能句式ExpressingandsupportinganopinionI’mhappytoaccept...but...Iwouldneveraccept...I’mnotbotheredabout...Idon’tmindbut...Ihopeyou’llcarryon...Areyousureyouwantto...?Iagreewithyouthat...Isitfairto...?Doyouthinkitiswiseto...?Ithinkyoushould...Welldonetoyoufor...Idon’tunderstandwhyyoudon’t...Ican’thelpthinking...Icouldneveragreeto...词汇四会词汇Differexacttwincommercialstraightforwardundertakebreakthroughprocedurecarriercastaltogetherarbitrarycorrectionobjectobjectionmediumobtainattainmoralconservativeforbidaccumulateconstitutioncompulsoryoperachorusloafflouroweshortlyretirebotherassumptionregulationstrikeinitialvainresistdrawbackmerelydecorationunablefeatherturkeyclawadorehatchreasonable2．词组castdown,objectto,themedia,infavourof，（be）boundto（do）...,fromtimetotime,bringbacktolife,payoff,invain结构Appositiveclause—that可引导同位语从句重点句子Itisawayof...Thefactisthat...Thequestionthatoccurred...Theadvantageisthat...Ⅲ.教材分析和教材重组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。1.1WarmingUp提供了四幅有关Dollythesheep(多莉羊)，Astrawberryplant(草莓植物)，Identicaldogs(克隆狗)，Twins（双胞胎婴儿）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。1.2Listening是关于人类克隆的听力材料，难度中等。1.3Speaking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。1.4Pre-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。1.5Reading是一篇介绍克隆技术的说明文。1.6Comprehending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。1.7LearningaboutLanguage分词汇和语法两部分，其中Discoveringusefulwordsandexpressions是根据语境在运用中掌握词汇。Discoveringusefulstructures是通过阅读和补全句子来练习。1.8UsingLanguage中的Reading，Discussingandwriting要求学生先读,然后再完成四个任务型的作业，即1.讨论并回答三个问题；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.Listeningandspeaking让学生根据所听到的内容选择并列出文中人物观点。2.课型设计与课时分配1stPeriodReading2ndPeriodLanguagepoints3rdPeriodLearningaboutLanguage4thPeriodGrammar5thPeriodUsingLanguage6thPeriodWritingⅣ.分课时教案ReadingTeachinggoals教学目标1.Targetlanguage目标语言a.重点词汇和短语clone,commercial,producer,undertake,arbitrary,object,forbid,accumulate,castdown,objectto,themedia,infavourofb.重点句子Itisawayof...Thefactisthat...Thequestionthatoccurred...2.Abilitygoals能力目标Enablethestudentstodescribecloning:Whatistheadvantagesofcloning？Whatistheproblemsordangersofcloning？Whatisyouropinionofcloning？3.Learningabilitygoals学能目标Helpthestudentslearnhowtodescribecloning.Teachingimportantpoints教学重点Howtodescribecloning.Teachingdifficultpoints教学难点Helpthestudentsanalyzethewritingtechniquesofthearticle.Teachingmethods教学方法Skimming,task-basedmethodanddebatemethod.Teachingaids教具准备Arecorder,aprojectorandsomeslides.Teachingprocedures&&ways教学过程与方式StepIWarmingupThistopicisdifficultforstudents.Soteachershouldhelpthestudentslearnmoreaboutit.Dothisinthewayofaskingandansweringquestions.T:Youcanimaginehowrapidlythemodernscienceandtechnologydevelop.Ithinkmostofyoumustknowsomethingaboutspacetraveling,submarineexploration,robot,maglevtrain,geneengineeringetc.Butinrecentyears,ahottopic,cloningisoftenmentioned,especiallywhenthecloningDollythesheepappeared.YoumayhavefirstheardofcloningwhenDollytheSheepshoweduponthescenein1997.CloningtechnologieshavebeenaroundformuchlongerthanDolly,though.Firstthingfirst,whatiscloningandaclone?Thedictionarysayscloningisthetechniqueofproducingageneticallyidenticalduplicateofanorganism.Acloneissaidtobealldescendantsderivedasexuallyfromasingleindividual,asbycuttings,bulbs,byfission,bymitosis,orbyparthenogenesisreproduction.Itsoundsverydifferentandcomplicatedtous.Infact,Imean,inourdailylife,thishappensoften.Forexample,gardenerstakecuttingsfromgrowingplantstomakenewones.Youoftenseethatyourmotherpicksasmallbranchfromagrowingplanttomakeanewone.Ifshelikesthiskindofflowers,shecandocloning.Cloningalsohappensinanimalsorhumanbeingswhentwinsidenticalinsexandappearanceareproducedfromthesameoriginalegg.Thefactisthatcloningplantsisstraightforwardbutthecloningofanimalsismorecomplicated.Thepossibilityofhumancloning,raisedwhenScottishscientistsatRoslinInstitutecreatedthemuch-celebratedsheep“Dolly”,arousedworldwideinterestandconcernbecauseofitsscientificandethicalimplications.Youcangiveyourquestionsifyouareinterestedinthistopic.Iamheretodayoneofthescientistswhoworkinthisfield.Iamreadytoansweranyofyourquestions.S:Nowweknowwhatiscloning.Aretheredifferenttypesofcloning?T:Whenthemediareportoncloninginthenews,theyareusuallytalkingaboutonlyonetypecalledreproductivecloning.Therearedifferenttypesofcloninghowever,andcloningtechnologiescanbeusedforotherpurposesbesidesproducingthegenetictwinofanotherorganism.Abasicunderstandingofthedifferenttypesofcloningiskeytotakinganinformedstanceoncurrentpublicpolicyissuesandmakingthebestpossiblepersonaldecisions.Thefollowingthreetypesofcloningtechnologieswillbediscussed:(1)recombinantDNAtechnologyorDNAcloning,(2)reproductivecloning,and(3)therapeuticcloning.S:WasDollycreatedbywhatcloning?AndwhywasDollysoimportant?T:Reproductivecloningisatechnologyusedtogenerateananimalthathasthesamenucle