Unit 2 Cloning 全单元教案.docx
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Unit 2 Cloning 全单元教案.docx
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Unit2Cloning全单元教案
Unit2Cloning
Ⅰ.单元教案目标
技能目标SkillGoals
▲Talkaboutcloning
▲Practiceexpressingandsupportinganopinion
▲Usetheappositiveclause
▲Writeacompositionaboutcloning
Ⅱ.目标语言
功
能
句
式
Expressingandsupportinganopinion
I’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
Differexacttwincommercialstraightforwardundertakebreakthroughprocedurecarriercastaltogetherarbitrarycorrectionobjectobjectionmediumobtainattainmoralconservativeforbidaccumulateconstitutioncompulsoryoperachorusloafflouroweshortlyretirebotherassumptionregulationstrikeinitialvainresistdrawbackmerelydecorationunablefeatherturkeyclawadorehatchreasonable
2.词组
castdown,objectto,themedia,infavourof, 结 构 Appositiveclause—that可引导同位语从句 重 点 句 子 Itisawayof...P11 Thefactisthat...P11 Thequestionthatoccurred...P12 Theadvantageisthat...P15 Ⅲ.教材分析和教材重组 1.教材分析 本单元以Cloning为话题,旨在通过单元教案,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.教材重组 2.1从话题内容上分析,WarmingUp与Reading相一致,而从训练目的上分析WarmingUp与TALKING比较一致。 从教材份量来说,可将WarmingUp和Reading整合在一起,设计成一节任务型“阅读课<一)<精读课)”。 2.2将Listening和Workbook中的LISTENING整合在一起,设计成一节“听力课”。 2.3将UsingLanguage与Workbook中的TALKING和SPEAKINGTASK结合在一起,设计成一节“口语课”。 2.4将LearningaboutLanguage与Workbook中的USINGWORDSANDEXPRESSIONS整合在一起上一节“语法课”。 2.5将Workbook中READINGTASK和PROJECT以及WRITINGTASK整合成一节“泛读与写作课”。 3.课型设计与课时分配 1stPeriodReading 2ndPeriodListening 3rdPeriodSpeaking 4thPeriodGrammar 5thPeriodExtensivereadingandwriting Ⅳ.分课时教案 TheFirstPeriodReading Teachinggoals教案目标 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,infavourof b.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教案重点 Howtodescribecloning. Teachingdifficultpoints教案难点 Helpthestudentsanalyzethewritingtechniquesofthearticle. Teachingmethods教案方法 Skimming,task-basedmethodanddebatemethod. Teachingaids教具准备 Arecorder,aprojectorandsomeslides. Teachingprocedures&&ways教案过程与方式 StepILead-in Thistopicisdifficultforstudents.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: ReproductivecloningisatechnologyusedtogenerateananimalthathasthesamenuclearDNAasanothercurrentlyorpreviouslyexistinganimal.Dollywascreatedbyreproductivecloningtechnology.ShewasthefirstmammaltobeclonedfromadultDNAtakenfromanadultcell.Previously,animalshadonlybeenclonedusingembryocellswhichalreadyhavethepotentialtobecomeacompleteembryoinitsownright.ThebigbreakthroughwithDollywastomakeaclonefromanordinary,adultcell—inthiscasefromafemalegoat’sudder. S: HaveyouseenJurassicPark? Inthisfeaturefilm,scientistsuseDNApreservedfortensofmillionsofyearstoclonedinosaurs.Theyfindtrouble,however,whentheyrealizethattheclonedcreaturesaresmarterandfiercerthanexpected.Couldwereallyclonedinosaurs? T: Intheory? Yes.Whatwouldyouneedtodothis? Awell-preservedsourceofDNAfromtheextinctdinosaur,andacloselyrelatedspecies,currentlyliving,thatcouldserveasasurrogatemother.Inreality? Probablynot.It’snotlikelythatdinosaurDNAcouldsurviveundamagedforsuchalongtime.However,scientistshavetriedtoclonespeciesthatbecameextinctmorerecently,usingDNAfromwell-preservedtissuesamples. Morequestionsaboutcloningaregivenintheappendix.Theinformationaboveisforreferenceonly.Oryoucanchooseseveralstudentsandaskthemtoactoutashortplaywhosemaintopicisasfollows: Anoldmanwhowasdyingleftallhisfortunetohisownson.Buthedidnotknowthathissonwascloned.Sotwosameyoungmenbothclaimedthattheyweretheoldman’sson.Theyquarreledandfoughtwitheachother;atlasttheywenttothejudge.ThejudgeletthemcheckDNA.TheresultwasthattheirDNAwasthesame.Noweventhejudgedidnotknowwhattodo. Inthisparttheteachercangivethestudentssomeadvicetoactout.Accordingtothisplayteacheraskthestudentsseveralquestions: 1.Doyouwanttobeclonedornot? Why? 2.Ifyouarethejudgewhatwillyoudo? 3.Canyoutellmetheadvantagesofcloning? 4.Andwhatisthedisadvantage? Discussion Inthispartthestudentswilldiscusstherelationshipbetweenthedevelopmentoftechnologyandsocialcustoms. T: Asthetechnologydevelopsdaybyday,ithasamoreandmoreimportantinfluenceonthewholesociety.Technologyaffectssocialcustomsandethics,sometimestechnologymaygoagainsttheconventionalthinking,thencomestheproblemthatwhetherweshouldstopthedevelopmentofresearchorchangetheethics. S1: Astechnologydevelopsinalmosteveryfield,alotofouroriginalcustomsandethicschanged,eitherbecausetheyareoutoftimeornotsoscientific.Forexamplemillionsofyearsagohumanatemeatofanimalswithoutheatingthem.Laterpeopleusedfireandnolongeraterawmeatandtheyalsousedfiretoscaredangerousanimals. S2: Ithinkwecouldnotstopthedevelopmentoftechnology,foritmaydevelopinthewaywhichisacceptablebysocialcustoms. … Lookatpictures T: Lookatthepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Thenexplainhowtheydiffer. S: IthinkthetwinsarenaturalclonesandtheDollysheepisman-made. T: Youareright! Canyouexplainhowtheydiffer? S: Thetwinswerebornatthesametime,buttheDollysheepisman-made. T: Anythingelse? Whowanthaveatry? S: Ithinktheidenticaldogisman-made. T: Goodjob! StepⅡPre-reading Beforeclass,askthestudentstosearchforsomeinformationaboutthistopic.Nowshowyourquestionsonthescreen,and
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