英语高二下人教版新课标选修8Unit2第3课时教案TheThirdPeriodSpeakingTeachinggoals教学目标1.Targetlanguage目标语言a.重点词汇和短语theme，fighting，conflict，argument，destruction，inone’sopinionb.交际用语ExpressingandsupportinganopinionIwouldneveraccept...I’mnotbotheredabout...Idon’tmindbut...Ihopeyou’llcarryon...Areyousureyouwantto...?Iagreewithyouthat...Doyouthinkitiswiseto...?Ithinkyoushould...Welldonetoyoufor...Ican’thelpthinking...Icouldneveragreeto...2.Abilitygoals能力目标Enablethestudentstoexpresstheiropinionsaboutcloningusingsomeusefulexpressions.3.Learningabilitygoals学能目标Helpthestudentslearnhowtoexpresstheiropinions.Teachingimportantpoints教学重点Learntousethestructuresofexpressingandsupportinganopinion.Teachingdifficultpoints教学难点Howtogiveaspeech.Teachingmethods教学方法Cooperativelearning.Teachingaids教具准备Acomputer&aprojector.Teachingprocedures&ways教学过程与方式StepⅠLead-inT:Goodmorning/afternoon,boysandgirls!Ss:MorningMr...T:Lastclasswehavetalkedaboutclone,weallknowitisnotadream.Noweveryone,ifIgiveyouachancetoclonewhatwillyourestorethen?S:Edison,dinosaurs,Japanesewolf,Einstein.T:DoyouwanttocloneHitler?S:No.Hitlerisadangerousperson.T:Ifsometerroristsmasterthisclonemethod,theymaybringdisasters.Allyourchoicesareexcellent.Todaywewilllearnanotherpassageaboutcloning,fromwhichwewillknowwhetherwecanbringdinosaursbacktolife.Askthestudentstogothroughsomefactsofcloning.T:Fromthesefactsweknowhumanbeingshaveachievedgreatprogressincloning.Nowreadthetextcarefullytogettheanswersforthesequestions:whatanimalshavepeoplecloned?S:Frogs,mice,cows,sheep,bisons,cats,anddogs.T:Goodjob.Answerthequestion:Whatarethecommoncharacteristicsoftheseanimals?Ss:Theyarenowadaysanimals.T:Yeah,IthinkyoumusthaveseenthefilmJurassicPark,inwhichascientistclonesseveraldifferentkindsofextinctdinosaurs.Canwereallyclonedinosaursnow?Letthestudentsturntopage15andthenreadthetextquickly.Severalminuteslater.S:Wecannotclonedinosaurs,becauseit’sdifficultforustogetitsDNA.T:Goodjob.It’sonlyadream.Dinosaursdisappeared65,000,000yearsago.Sothechanceofdinosaurseverreturningtotheearthismerelyadream.StepⅡReadandanswer(P16)Toanswerthesethreequestions,teachercangivethestudentssomeexamplesasexplanation,forexample,Question1.T:Nowthinkaboutthisquestion:ifintheworldthereisonlyonesheepandhumanbeingswanttoclonemore.SomedayslateraDollyappears,thenmanymore.Butonedayallsheepgetthesamedeadlydisease.Nowpleasethinkaboutwhattheresultsare.S:Maybetheywouldalldie.T:Why?S:Becauseallsheephavethesamearrangementofgenes.T:Right.NowcanyouanswerQuestion1?Whyshouldn’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?S:Itisuselesstocloneananimalifthereisnotenoughdiversityinthegroupforittoovercomeillnesses.T:Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?S:Iftheclonedanimalshavetoliveinthezoo,itisunfairtothem.Theyneedfreedom.T.Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?S:Dinosaursdisappeared65,000,000yeasago.Sothechanceofdinosaursreturningtotheearthismerelyadream.StepⅢDiscussion(Question2)Thisisaspeakingtask.Askthestudentstohaveadiscussioningroups,organizetheirwordsproperly,andgivevividdescriptionofthechosenanimals.T:Nowlookatthetableonpage16,discussinpairswhichextinctanimalsdescribedareworthrestoringbymeansofcloning.Chooseoneanimalandusetheinformationtohelpyouarguewhythisani...
