高中英语第二册上Unit9SavingtheearththeFirstPeriod.docx
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高中英语第二册上Unit9SavingtheearththeFirstPeriod.docx
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高中英语第二册上Unit9SavingtheearththeFirstPeriod
2019-2020年高中英语第二册上Unit9Savingtheearth-theFirstPeriod
1.BriefStatementsBased0ntheUnit
Inthisunit,Sswilldosomelisteningspeaking,readingandwritingpractice.Also,theywilllearntousetheInversion.Inthefirstperiod,Sswi1limprovetheirspeakingabilitybytalkingaboutnatureecologyandtheenvironmentandtheywilllistentosomelisteningmaterialaboutourenvironment.Afterthestudyofthisperiod,theywillimprovetheirspeakingandlisteningabilitiesandalsoknowsomethingabouttheproblemsfacingtheearth.Inthesecondperiod,SswillreadapassageabouttheEarthSummit.FromthepassageSswillknowmoreabouttheimportanceofprotectingourearth.Inthethirdperiod.Sswillstudythegrammaritem:
Inversion.Afterdoingsomeexercisesprovidedinthisperiod.andwiththehelpoftheteacher,SswillknowhowtousetheInversion.TeachermayprovidemoreexercisesforSstoconsolidateifnecessary.Inthelastperiod,SswilllistentotwospeechesfromtheEarthSummitandfinishthepracticeprovidedinthefirstpart.SswillknowmoreabouttheEarthSummitandimprovetheirlisteningability.Inthewritingpart,Sswillimprovetheirwritingabilitybywritinganevaluationparagraphwiththehelpofsomegivenexpressions.Afterthestudyofthisunit.Sswillknowhowtosupportanopinion,andtheywillknowmoreaboutenvironmentprotection.Theywillknowthatifallofusmakesmallchanges.wecouldmakeabigdifference.Theywilldomoretoprotectourearth.
II.TeachingGoals
1.Talkaboutnatureecologyandthe、environment.
2.Practisesupportinganopinion.
3.Learntouseinversion.
4.Writeanevaluationparagraph.
III.Teachingtime:
Fiveperiods
IV.BackgroundInformation
1.ProtectTheOzoneLayer
Inthemiddleofwinter,whensnowisfallinginmanypartsoftheUnitedStates,
scientistshavesoundedawarningtopeoplewhoplantospendmanyhoursinthesunthissummer.Thewarning:
Thesun'ssummer-timeraysaremoredangerousthanonce
thought.
Ateamofscientistsfrom80nationsrecentlyreportedtotheUnitedNationsthatalayerofozoneintheatmosphere,whichprotectshumansfromharmfullevelsofultravioletradiation,willbethinnerovertheUnitedStatesthissummer.Thethinner1ayerallowsmoreultravioletraysfromthesuntoreachtheearth.Theextraamountofultravioletradiationcouldcauseanincreaseinthenumberofcasesofskincancer.
Scientistsfirstbecameconcernedabouttheozonelayerinthemid-1980swhenaholewasdiscoveredinthelayeraboveAntarcticaduringthewinter.Theholewascausedbychemicalsusedinrefrigeratorsandairconditioners.Whenthesechemicalsaresentoutintotheatmosphere,theyproducegasesthatdestroytheozone.
ConcernabouttheprotectiveozonelayerrosemorerecentlywhendatafromsatellitesandgroundstationsshowedthatozonelevelsweredroppingoverareasotherthanAntarctica.LowozonelevelswererecordedinthespringandsummerovertheUnitedStatesandoverotherpopulatedareasintheworld.
Althoughmanycountrieshavealreadybegunstoppingtheuseorozone—destroying
chemicals,thenewfindingsareexpectedtoadvancethetimetableforatotalbanofthechemicals.
2.Pollution
Peopletodayallovertheworldarebeginningtohearandlearnmoreandmoreabouttileproblemofpollution.Pollutioniscausedeitherbytherelease(排放)ofpletelynewandoftenartificialsubstancesintotheenvironment,orbyreleasinggreatlyincreasedamountsofanaturalsubstance.suchasoilfromoiltankersintothesea.Withthedevelopmentofmodernindustry,manyofthegoodsandmachinesweneedanduseinourdailylivesarecreatinganumberofwasteproductswhichupsettheenvironmentbalance.Manyofthesewasteproductscanbepreventedifpeoplepaymoreattention,butclearlywhilemoreandmorenewgoodsareproducedandmadeplex,therewillbenewdangerouswastestobethrownaway,forexample,thewasteproductsfromnuclearpowerstations.Manypeople,therefore,seepollutionasonlypartofalargerandmoreplexproblem.
Thereisnodoubtthatmuchofthepollutioncausedcouldbecontrolledifonlypanies,individualsandgovernmentwouldmakemoreefforts.Inthehomethereisanobviousneedtocontrollitterandwaste.Foodeswrappedupthreeorfourtimesinpackagesthatallhavetobegotridof;drinksareincreasinglysoldinbottlesortimeswhichcannotbereused.Thisnotonlycausesalitterproblem,butalsoisagreatwasteofresources,intermsofglass,metalsandpaper.
Advertisinghashelpedthisprocessbypersuadingmanyofusnotonlytobuythingsweneitherwantnorneed.butalsotothrowawaymuchofwhatwedobuy.Pollutionandwastebinetobeaproblemeveryonecanhelptosolvebycuttingunnecessarybuying,overconsumptionandcarelessreleaseoftheproductsweuseinourdailylives.
TheFirstPeriod
TeachingAims:
1.Trainthestudents’listeningability.
2.Improvethestudens’speakingabilitybytalkingaboutnatureecologyandtheenvironment.
3.Learnandmastersomeusefulexpressionsforsupportinganopinion.
4.Helpthestudentstoknowsomethingaboutthepollution.
TeachingImportantPoints:
1.Improvethestudents’speakingability.
2.Improvethestudents’listeningability.
3.Helpthestudentstolearntosupportanopinion.
TeachingDifficultPoints:
1.Howtoimprovethestudents’speakingandlisteningabilities.
TeachingMethods
1.Listening-and-answeringactivitytohelpthestudentsgothroughthelisteningmaterial.
2.Discussiontomakethestudentspracticesupportinganopinion.
3.Individual,pairorgroupworktomakeeverystudentworkinclass.
TeachingAids:
1.themultimedia
2.ataperecorder
3.theblackboard
TeachingProcedures:
StepIGreetings
Greetthewholeclassasusual.
StepIIWarmingup
(Showthepicturesonthescreen.)
T:
Lookatthesepictures.Howbeautifultheyare!
Doyouwanttopayavisitto
theseplaces?
Ss:
Yes.
T:
Butinsomeplaces,it’snotsobeautifulLookatthepictures.please.
(Showthefollowingpicturesonthescreen.)
T:
Whatcanyouseeinthepictures?
S:
1canseeariver,whichispolluted.Theriverwaterisverydirty.
S:
Icanseesmokeingfrommanychimneys,andtheairisdark.Theairispolluted.
T:
Good.Whichproblemdoyouthinkisthebiggestonefacingtheearth?
S:
Ithinkitisthewaterpollution.
T:
Whydoyouthinkso?
S:
Becauseifwaterispolluted.Peoplewillnotbeabletogetcleanwatertodrink;
therefore,manypeoplewillgetsick.It’sterrible.
T:
Verygood.Whohasadifferentopinion?
S:
Ithinktheairpollutionisthebiggestproblem.Becauseiftheairispolluted,therewillnotbecleanairforustobreathe.Everybodywillgetterriblediseases.
T:
Quiteright.Now,whocantelluswhatcausestheseproblems?
S:
Ithinkitisbecausepeoplepaynoattentiontoourenvironment.Theypour
wastewaterintorivers,1akesandseaswithoutcleaningit.
S:
Theairpollutioniscausedbythefactories.Peoplebuildfactoriestodevelop
theindustry,buttheyneverpayattentiontocontrollingthepollution.The
harmfulsmokeshouldbemadeharmlessbeforeitgoesintotheair,butfew
factorieswouldliketodosobecausethiswillcostmuch.
T:
Verygood.Now,whoknowswhatwecandotosolvetheseproblems?
S:
Ithinkourgovernmentshouldpaymoreattentiontoenvironmentalprotection.Theyshouldcheckthefactoriesasoftenaspossibletomakesuretheydon’tpourwastewaterintoriversorlakesandmakesuretheydon’tlet
harmfulsmokegointotheair.
T:
Goodidea.Now,pleaseopenyourbooksandturntoPage65.TherearesixpicturesinWarmingup.Wehavejusttalkedabouttwoofthem.Now,workingroupsoffourtotalkabouttheotherpictures.Answerthequestionsbelowthepictures.
(Awhile1ater,asksomestudentstoactout.)
StepIIIPreparationforListeningandListening
T:
Verygood.Ithinkyou’reknownsomethingaboutourenvironment.
Now,pleaseturntoPage66.LookatthepictureinListening.Whatcanyousee?
Ss:
Apersonismakingaspeechtotheaudience.
T:
Canyouguesswhatspeechsheisgiving?
Ss:
Maybeaboutourearth.
T:
OK.Now,let’slistentothetape.I’llplayittwiceforyou.Listencarefully
toanswerthequestionsinPart1.
(PlaythetapetwiceforSstolistenandwritedowntheiranswers.Thenasksomestudentstoreadouttheiranswers.Checkwiththewholeclass.Theteachersaysthefollowing.)
T:
Good.You’redoneverywell.Butfromthepassageweknowthatshehasn’tfinishedherspeech.Whatdoyouthinkshewi1lsaynext?
Haveashortdiscussioninpairs.please.(Sshaveashortdiscussionandthentheteacherasksoneortwopairstosaytheiranswers.)Welldone.Now.1et’slistentothesecondpart.Listencarefullytooutlinethespeaker’stwoarguments.FillinthetableinPart2.Areyouready?
Ss:
Yes.
T:
OK.Let’sbegin.
(PlaythetapetwiceforSstoListenandwritedowntheiranswers.Pausethetapeifnecessary.Thenaskseveralstudentstoreadouttheiranswers.)
T:
Now,let’slistentothetapeagaintocheckyouranswers.(Playthetapeoncemoreandthenchecktheanswerswiththewholeclass.)Good.P1easethinkaboutwhatthespeakerwillsaynext.Youcallusewhatyouhaveheardonthetapetopredictwhatwillenext.Makeanoutlineliketheoneinthetableandthenwritedownwhatyouthinkthespeakerwillsay.Youcanworkinpairsorgroupsoffourasyoulike.
(Amoment1ater,asksomestudentstoreadouttheirparagraphsandparedifferentspeechestochoosethebestone.)
StepⅣSpeaking
T:
Welldone!
We’vetalkedmuchaboutpollution.Weknowthatpollutionisabigproblemfacingtheearth.Butwhycan’twestopthepollution?
Whydoesn’tourgovernmentshutdownthefactoriesthatpollutetheenvironmentbadly?
Whoknows?
S:
Ithinko
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