选修6Unit4Globalwarming教学设计TheSecondPeriodReadingTeachinggoals教学目标1.Targetlanguage目标语言a.重点词汇和短语compare,phenomenon,graph,fuel,trap,data,climate,catastrophe,consequence,range,per,glance,compareto,comeabout,fiercedebate,resultin,buildupb.重点句式Thereisnodoubtthattheearthisbecomingwarmer.P26Withoutthe‘greenhouseeffect’,theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.P26Theyalsoagreethatitistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.P262.Abilitygoals能力目标Enablethestudentstotalkaboutthecausesandeffectsofglobalwarming.3.Learningabilitygoals学能目标Helpthestudentslearnhowtotalkaboutthecausesandeffectsofglobalwarmingandexpressideasaboutwhatpeopleshoulddoaboutit.Teachingimportantpoints教学重点Helpthestudentslearnhowtodebateoverthetopic“Weshoulddonothingaboutglobalwarming.”Teachingdifficultpoints教学难点Enablethestudentstolearnthewritingskillsofthetextandgetabetterunderstandingofarticlesofthiskind.Teachingmethods教学方法Listening,readingandgroupwork.Teachingaids教具准备Arecorderandacomputer.Teachingprocedures&ways教学过程与方式StepⅠRevisionCheckthehomework.Reviewtheusefulexpressionsaboutagreementanddisagreement.Showthestudentssomepicturesonthescreen.Thestudentshavetogivenamesofdifferentenergysourcesrelativetothepicturesanddeicidewhichenergysourcesarerenewableandwhicharenot.Thenaskthestudentstotelltheeffectsofusingtheseenergysources.StepⅡPre-readingShowapictureofgreenhouseonthescreen.T:Nowlookatthepicture.Whatisitinthepicture?S:Agreenhouse.T:Right.Whocantellmewhatitisusedfor?Sa:Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.T:Yes,youareright.Andhowdoesitwork?Sb:Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.T:Exactly.Thankyou.Buttodaywearenotgoingtotalkaboutgreenhouse,we’lltalkaboutgreenhousegases.Haveyouheardaboutthisbefore?Sc:Iknow.Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,includingcarbondioxide,methaneandwatervapor.T:That’scorrect.Thenwhatdoyouthinkgreenhousegasesdo?Sd:Letmeexplainit.Theytrapheatfromthesunandthereforewarmtheearth.T:Yes.Lastclasswetalkedabouttheeffectsofburningfossilfuels.Oneoftheeffectsismoreandmorecarbondioxideisbeingproduced,whichinturnincreasesthespeedofglobalwarming.Doesitmatter?What’reyouropinions?Nextwe’llreadanarticle“THEEARTHISBECOMINGWARMER—BUTDOESITMATTER?”StepⅢWhile-readingGetthestudentstoreadthepassagefastandmeanwhilehelpthestudentsformagoodhabitofreading.T:Whatdoyouthinkwillbetalkedaboutatthesightofthetitle“THEEARTHISBECOMINGWARMER—BUTDOESITMATTER?”Nowpleaseskimthepassagetoobtainageneralideaofthewholepassage.Whilereading,payattentiontothewritingskillsandifpossible,dividethewholepassageintoseveralpartsandsummarizethemainideaforeachpart.Afterafewminutes.T:Howmanypartscanthistextbedividedinto?T:Anydifferentideas?OK.Nowlet’sfinishtheformonthescreen.Showtheformonthescreenandletthestudentscompletetheform.MainideasofeachpartWritingtechniquesMainideasofeachpartWritingtechniquesStepⅣComprehendingLetthestudentsreadthepassageagaintofindouttheanswerstothequestionsinExercises1and2.T:Nowlet’slistentothetape.Whilelistening,paymoreattentiontospecificinformation.Thenreadthewholepassagebyyourselves.Trytof...
