高中英语同步教案第课时UnitCloning人教新课标选修8.docx

高中英语同步教案第课时UnitCloning人教新课标选修8.docx

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高中英语同步教案第课时UnitCloning人教新课标选修8

2014-2015学年高中英语（贵州）同步教案第1课时：

Unit2Cloning人教新课标选修8）

Unit2Cloning

Ｉ．单元教学目标

话题Topics

Naturalclonesandman-madeclones;

Thehistoryofcloning;

Controversyaboutcloning

技能目标Goals

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

1.四会词汇

Strawberry，differ，exact，straightforward，breakthrough，disturbing，cast，altogether，objection，media，moral，ceiling，shortly，retire，assumption，merely，decoration，zebra，aloud

2.词组

castdown，objectto，themedia，infavourof，（be）boundto（do）…,fromtimetotime,bringbacktolife,payoff

3．重点词汇

clone，commercial，producer，undertake，arbitrary，object，forbid，accumulatebother，regulation，resist，unable，argument，reasonable，obtain

结构

Appositiveclause—that可引导同位语从句

重点句子

Itisawayof….（P11）

Thefactisthat….（P11）

Thequestionthatoccurredis….（P12）

Howdifferentlydopeoplethinkof….（P14）

The….is…but…（P14）

Theadvantageisthat….（P15）

Howwouldyoutreat….（P54）

Idon’tmindbut….（P55）

Iagreewithyouthat….（P55）

分课时教案

TheFirstPeriodWarmingupandReading

Teachinggoals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，infavourof

b.重点句子

Itisawayof….

Thefactisthat….

Thequestionthatoccurredis….

2.Abilitygoals能力目标

Enablethestudentstodescribecloning:

Whatistheadvantagesofcloning？

Whatistheproblemsordangersofcloning？

Whatisyouropinionofcloning？

3.Learningabilitygoals学能目标

Helpthestudentslearnhowtodescribecloning.

Teachingimportantpoints教学重点

Howtodescribecloning.

Teachingdifficultpoint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

StepIWarmingup

Thistopicisdifficultforstudents.Soteachershouldhelpthestudentslearnmoreaboutit.Dothisinthewayofaskingandansweringquestions.

T:

Youcanimaginehowrapidlythemodernscienceandtechnologydevelop.Ithinkmostofyoumustknowsomethingaboutspacetraveling,submarineexploration,robot,maglevtrain,geneengineeringetc.Butinrecentyears,ahottopic,cloningisoftenmentioned,especiallywhenthecloningDollythesheepappeared.YoumayhavefirstheardofcloningwhenDollytheSheepshoweduponthescenein1997.CloningtechnologieshavebeenaroundformuchlongerthanDolly,though.Firstthingsfirst,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,andacouldserveasasurrogatemother.Inreality?

Probablynot.It’snotlikelythatdinosaurDNAcouldsurviveundamagedforsuchalongtime.However,scientistshavetriedtoclonespeciesthatbecameextinctmorerecently,usingDNAfromwell-preservedtissuesamples.

Morequestionsaboutcloningaregivenintheappendix.Theinformationaboveisforreferenceonly.Oryoucanchooseseveralstudentsandaskthemtoactoutashortplaywhosemaintopicisasfollows:

Anoldmanwhowasdyingleftallhisfortunetohisownson.Butthedidnotknowthathissonwascloned.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,andthenletthemdiscusswitheachother.

T:

Nowpleaseworkinpairsanddiscussaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistwithyourpartner.

Ss:

Yes,sir/madam.

Questionsaboutcloning:

1.Whatisaclone?

2.Howisacloneproduced?

3.Whatbenefitscanhumansgainfromcloning?

4.Whatproblemsmayarisewhenhumansarecloned?

5.Shouldweclonehuman?

6.Couldcloningreplacesexasthemeansofcreatingnewhumanlife?

7.Couldaparentcloneachildwhoisdyingofaterminalillness?

（Afterafewminutes.）

T:

Doyouhaveotherquestions?

Volunteer!

S:

Ihave!

Whatisthewriter’sopinion?

T:

Goodjob!

Ithinkmanyofyouhavequestions,nowletusreadthearticlewiththequestions.

Suggestedanswers:

1.Itisawayofmakinganexactcopyofanotheranimalandplant.

2.Thishappensinplantswhengardenerstakecuttingsfromgrowingplantstomakenewones,andwhensmallpartsofaplantaretakenandgowninalaboratory.Italsohappensinanimalswhentwinsidenticalinsexandappearanceareproducedfromthesameoriginalegg.

3.Itcanhelpcurediseaseandcanhelpcoupleswhohavenobabytobearanewbaby.

4.TheremaybemorebadpeoplelikeHitler.

5.Inmyopinion,Idonotagree,fori