人教新课标高中英语选修8 unit 2第3课时

TheThirdPeriodTeachinggoalstheme，fighting，，argument，destruction，inone’s交际用语ExpressingandsupportinganopinionIwouldneveraccept...I’mnotbotheredIdon’tmindIhopeyou’llcarryAreyousureyouwantto...?Iagreewithyouthat...Doyouthinkitiswiseto...?Ithinkyoushould...Welld oyoufor...Ican’thelpIcouldneveragreeAbilitygoals能力目标EnablethestudentstoexpresstheiropinionsaboutcloningusingsomeusefulLearningabilitygoalsHelpthestudentslearnhowtoexpresstheiropinions.Teachingimportantpoints教学重点Learntousethestructuresofexpressingandsupportinganopinion.Teachingdifficultpoints教学难点Howtogiveaspeech.Cooperativelearning.Acomputer&aTeachingprocedures&waysT:Goodmorning/afternoon,boysandgirls!Ss:MorningMr...T:Lastclasswehavetalkedaboutclone,weallknowitisnotadream.Noweveryone,ifIgiveyouachancetoclonewhatwillyourestorethen?S:Edison,dinosaurs,Japanesewolf,Einstein.DoyouwanttocloneS:No.HitlerisadangerousT:Ifsometerroristsmasterthisclonemethod,theymaybringdisasters.Allyourchoicesareexcellent.Todaywewilllearnanotherpassageaboutcloning,fromwhichwewillknowwhetherwecanbringdinosaursbacktolife.AskthestudentstogothroughsomefactsofT:Fromthesefactsweknowhumanbeingshaveachievedgreatprogressincloning.Nowreadthetextcarefullytogettheanswersforthesequestions:whatanimalshavepeoplecloned?S:,mice,cows,sheep,bisons,cats,andT:Goodjob.Answerthequestion:Whatarethecommoncharacteristicsoftheseanimals?Ss:TheyarenowadaysT:Yeah,IthinkyoumusthaveseenthefilmJurassicPark,inwhichascientistclonesseveraldifferentkindsofexttdinosaurs.CanwereallyclonedinosaursS:Wecannotclonedinosaurs,becauseit’sdifficultforustogetitsthechanceofdinosaurseverreturningtotheearthismerelyadream.StepⅡReadandanswerToanswerthesethreequestions,teachercangivethestudentssomeexamplesanation,forexample,Question1.T:Nowthinkaboutthisquestion:ifintheworldthereisonlyonesheepandhumanbeingswanttoclonemore.SomedayslaDollyappears,thenmanymore.Butonedayallsheepgetthesamedeadlydisease.Nowpleasethinkaboutwhattheresultsare.S:Maybetheywouldalldie.T:Why?S:BecauseallsheephavethesamearrangementofT:Right.NowcanyouanswerQuestion1?Whyshouldn’tyoucloneanext animalunlessthereisenoughdiversityinthegroup?itto eillnesses.T:Whyisitwrongtoclonean tanimalifitwouldhavetoliveina?S:Iftheclonedanimalshavetoliveinthezoo,itisunfairtothem.They.T.Whycan’tyouclheofanimalsthathavebeenexttlongerthan10,000years?S:Dinosaursdisappeared65,000,000yeasago.Sothechanceofdinosaursreturningtotheearthismerelyadream.StepⅢDiscussion(QuestionThisisaspeakingtask.Askthestudentstohaveadiscussioningroups,organizetheirwordsproperly,andgivevividdescriptionofthechosenanimals.T:Nowlookatthetableonpage16,discussinpairswhichexttanimalsdescribedareworthrestoringbymeansofcloning.ChooseoneanimalandusetheinformationtohelpyouarguewhythisanimalshouldberestoredtotheGivethestudentssixminutestoS1:IthinkGreatAukisawonder.Becauseitisaverylargebirdthatcannotfly.Theusefulthingaboutitisthatitsfeatherdoesn’tabsorbwater.Ithinkifwewearclothesmadeofitsfeather,wewillnotworryaboutrain.S2:Iagreewithyou.ButIamhappytoacceptDodobirdbecauseitisfriendlyandnotharmful.Ilikegentleanimals.Itcsolaylargeeggsanditsmeatistasty,butIdon’tthinkIwilleatitsmeat.T:FromyouranswersIthinktheseanimalsareallusefulandtheyallshouldberestoredtotheearth.Atthesametime,weshouldtryourbesttoprotectthem.Doyouagreewithme?S:StepⅣWritingareportDealwithQuestionsthreeandfour.Dividethewholeclassintofourgroups.Thentheycanhaveacompetition.T:Noweveryone,imagineallofyouareownersofyourchosenanimal.Nowworktogether,andgiveusavividdescriptionofyourpet,thenIwilldecidewhichoneisthebesttoberesortedtotheearth.Severalminuteslater,thestudentsgiveperformances.Atthesametime,listsomemajorpointsontheblackboard.T:Welldoneeveryone.Itisreallyhardformetochoose,letusvote?StepⅤTALKINGAskthestudentstotalkaboutthequestionswiththeteacher’sT:Lookatthequestionsonpage54.Doyouknowhowtoshowyouropinion?YoucandiscussthefollowingquestionswithyourpartnerandusetheseexpressionsonpageHowwouldyoufeelabouthavingacloneofyourselfintheWhatproblemsdidyouhavegrowingupandhowcanyouhelphim/heravoidthem.StepⅥT:Writedownyourfeelingsandattitudestowardsclone.Comb hemintoaSampleversionInmyopinionitiswrongtoclonehumanbeings.Ifmyparentsdecidetohaveaclonemadeofme,IwillfeelverysadandIwillneveracceptthecloneasamemberofmyfamilyorasmyfriendbecauseIthinkitisunfairtonaturalWeareallsonsofnature,birthordeathisanaturalthing.Thedayweborn,itdestinedwearet.Nobodyhastherighttochangeourselves.IfonedayIweretobeclonedtoanother ,hewouldkillme,becauseIlostsomeoriginalcharacters.Ihopeweshouldrespecthumanbeings,andnotchangeanyoriginalthings.SampleversionIthinkthecloningrepresentstheprogressofthemankind.Butitstillhasmanyproblemstoworkout,thelaw,theethicandespeciallythegoalsandpurposesforcloning.However,weareactuallyngmuchofthisresearchfortheimprovementoflifeforhumans.Weshouldgetbenefitfromcloning.hina,theernmenthasputoutwrittenon