千里之行，始于足下。讓知識(shí)帶有溫度。第第2頁(yè)/共2頁(yè)精品文檔推薦2023年NSEFC-IIUnit09志鴻教案系列(人教版高二英語(yǔ)上冊(cè)教案教學(xué)設(shè)計(jì))整理Unit9Savingtheearth

1．BriefStatementsBased0ntheUnit

Inthisunit，Sswilldosomelisteningspeaking，readingandwritingpractice．Also,theywilllearntousetheInversion．Inthefirstperiod，Sswi1limprovetheirspeakingabilitybytalkingaboutnatureecologyandtheenvironmentandtheywilllistentosomelisteningmaterialaboutourenvironment．Afterthestudyofthisperiod，theywillimprovetheirspeakingandlisteningabilitiesandalsoknowsomethingabouttheproblemsfacingtheearth．Inthesecondperiod，SswillreadapassageabouttheEarthSummit．FromthepassageSswillknowmoreabouttheimportanceofprotectingourearth．Inthethirdperiod．Sswillstudythegrammaritem：Inversion．Afterdoingsomeexercisesprovidedinthisperiod．a(chǎn)ndwiththehelpoftheteacher，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)ofcompletelynewandoftenartificialsubstancesintotheenvironment,orbyreleasinggreatlyincreasedamountsofanaturalsubstance．suchasoilfromoiltankersintothesea．Withthedevelopmentofmodernindustry，manyofthegoodsandmachinesweneedanduseinourdailylivesarecreatinganumberofwasteproductswhichupsettheenvironmentbalance．Manyofthesewasteproductscanbepreventedifpeoplepaymoreattention，butclearlywhilemoreandmorenewgoodsareproducedandmadecomplex，therewillbenewdangerouswastestobethrownaway，forexample，thewasteproductsfromnuclearpowerstations．Manypeople，therefore,seepollutionasonlypartofalargerandmorecomplexproblem．

Thereisnodoubtthatmuchofthepollutioncausedcouldbecontrolledifonlycompanies,individualsandgovernmentwouldmakemoreefforts．Inthehomethereisanobviousneedtocontrollitterandwaste．Foodcomeswrappedupthreeorfourtimesinpackagesthatallhavetobegotridof；drinksareincreasinglysoldinbottlesortimeswhichcannotbereused．Thisnotonlycausesalitterproblem，butalsoisagreatwasteofresources，intermsofglass，metalsandpaper．

Advertisinghashelpedthisprocessbypersuadingmanyofusnotonlytobuythingsweneitherwantnorneed．butalsotothrowawaymuchofwhatwedobuy．Pollutionandwastecombinetobeaproblemeveryonecanhelptosolvebycuttingunnecessarybuying,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．a(chǎn)taperecorder

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：Icanseesmokecomingfrommanychimneys，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．Youcallusewhatyouhaveheardonthetapetopredictwhatwillcomenext．Makeanoutlineliketheoneinthetableandthenwritedownwhatyouthinkthespeakerwillsay．Youcanworkinpairsorgroupsoffourasyoulike．

(Amoment1ater，asksomestudentstoreadouttheirparagraphsandcomparedifferentspeechestochoosethebestone．)

StepⅣSpeaking

T：Welldone!We’vetalkedmuchaboutpollution．Weknowthatpollutionisabigproblemfacingtheearth．Butwhycan’twestopthepollution?Whydoesn’tourgovernmentshutdownthefactoriesthatpollutetheenvironmentbadly?Whoknows?

S：Ithinkourgovernmentmusthaveitsownopinion．Maybetheythinkthefactoriesaremoreimportantthantheenvironment．Becausethegovernmentcangetlotsofmoneyfromfactories．Iftheyshutthefactoriesdown,itwillnotbeabletogetsomuchmoney．Andthisisnotgoodforthedevelopmentofthecityortown.

T：Yes．Differentpeoplehavedifferentopinions．Theymaynotagreewithoneanother．Sosometimesit’sveryhardtomakeadecisionandtomakeachange．Forexample，weknowthatcoalisavaluableresourcethatcanbeusedtoproduceenergy，butitalsocausesseriouspollution．Whatshouldwedowithit?(Ssmayhavevariousanswers．)Yousee，youdon’tagreewitheachother．Now，weneedtohaveameetingtodiscussthisproblem．Pleaseworkingroupsoffive．Youshouldplaydifferentroles：abusinessman．a(chǎn)scientist.alocalcitizen，anenvironmentalistandalocalleader．Differentpeoplehavedifferentopinions．

(Everypersonhashis／herownopinion．)Pleasediscusstheissuefirstand

thenthelocalleadershouldsummariseandmakeadecision．YoucanhavealookatthetableandtheusefulexpressionsinSpeakingPartbeforeyoubeginyourdiscussion．They’reveryhelpful．

(Givethestudentsenoughtimetohaveadiscussionandthenaskthestudentswhoplaytheroleofthelocalleadertoreadouttheirdecisions．Comparethemandchoosethebestdecision．)

Sampledialogue：

A：Todayweareheretodecidewhetherweshouldburnthecoal．Pleasetellus

whateveryouthink．

B：Ithinkweshouldburnthecoal．1fwedon’tburnitnow，maybeitwillbe

uselessinthefuture，Newenergywi1lbeusedinsteadofcoal，suchas．solarenergy．

C：Butburningcoalcausestoomuchpollutiontoourenvironment．1tpollutestheairbadly.Ifnothingisdonetostopitspollutiontoourearth，thenwewill

Havenofreshairtobreathe．

D：Yes，Iquiteagree．Ithinkweshouldn’tburnthecoalnow.Itwouldbebetter

ifwespendmoremoneyonsciencetofindabetterwayofusingthecoal．Once

weknowhowtoburnitwithoutpollutingtheenvironment,wecanmakefulluseofit．

E：Thatsoundsquitereasonable，butit’sclearthatifwewanttodevelopourareaassoonaspossible，weneedmoney．Howcanwegetmoney?Wecanonlyburnthecoaltomakethefactoriesworktomakemoney．Ifwestopusingthecoalnow,howshallwecontinueourproductionand