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1、Unit4Globalwarming.1.教材分析本单元以Globalwarming为主线，旨在通过单元教学使学生经过思考、学习，认识到全球变暖的起因和它所带来的种种后果。同时鼓励学生进一步阐述地球所面临的其它严重问题，激发学生的环保意识。引导学生运用所学语言、句式表达自己对这些现象的看法，培养他们为自己的观点辩论的能力，并能运用所学知识写一篇有关环境问题的论文。1.3Reading是一篇从杂志节选的文章。它讲述了全球加速变暖的原因——人为温室效应，后果以及人们对此的不同观点。要求学生在理解文章大意的同时注意它
2、的写作技巧：提出问题——分析现象——阐述各方面的不同观点——以疑问句作为总结引发读者深思，自行做出判断。这为Comprehending中Exercise3的分组辩论活动留出了很大的空间，埋下了很好的伏笔。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
3、,compareto,comeabout,fiercedebate,resultin,buildupb.重点句式Thereisnodoubtthattheearthisbecomingwarmer.P26Withoutthe‘greenhouseeffect’,theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.P26Theyalsoagreethatitistheburningofmoreandmorefossilfuelsthathasr
4、esultedinthisincreaseincarbondioxide.P262.Abilitygoals能力目标Enablethestudentstotalkaboutthecausesandeffectsofglobalwarming.3.Learningabilitygoals学能目标Helpthestudentslearnhowtotalkaboutthecausesandeffectsofglobalwarmingandexpressideasaboutwhatpeopleshoulddoabout
5、it.Teachingimportantpoints教学重点Helpthestudentslearnhowtodebateoverthetopic“Weshoulddonothingaboutglobalwarming.”Teachingdifficultpoints教学难点Enablethestudentstolearnthewritingskillsofthetextandgetabetterunderstandingofarticlesofthiskind.Teachingmethods教学方法Liste
6、ning,readingandgroupwork.Teachingaids教具准备Arecorderandacomputer.Teachingprocedures&ways教学过程与方式StepⅠRevisionCheckthehomework.Reviewtheusefulexpressionsaboutagreementanddisagreement.Showthestudentssomepicturesonthescreen.Thestudentshavetogivenamesofdifferentene
7、rgysourcesrelativetothepicturesanddeicidewhichenergysourcesarerenewableandwhicharenot.Thenaskthestudentstotelltheeffectsofusingtheseenergysources.StepⅡPre-readingShowapictureofgreenhouseonthescreen.T:Nowlookatthepicture.Whatisitinthepicture?S:Agreenhouse.T:R
8、ight.Whocantellmewhatitisusedfor?Sa:Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.T:Yes,youareright.Andhowdoesitwork?Sb:Theairinsideiswarmbecausetheglasstrapstheh
