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1、Unit4Globalwarming学情分析：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。类别课程标准要求掌握的项目话题Globalwarming,pollutionandtheimportanceofprotectingtheearth
2、功能句式Expressingagreement,disagreement,blameandcomplaintYes,Iagreewithyou./Yes,Ithinkso./Ibelievethatyou’vegotitright.Idon’tthinkso./Idon’tthinkthat’sright./I’mafraidyouarewrong.I’msorrytobringthisup,but.../I’msorrytohavetosaythis,but...Theyshouldn’thavedoneit.
3、/Theyaretoblame./Whydon’tyoudosomethingaboutit?/Perhapstheyshould/oughttodo...词汇本单元无写作词汇。阅读词汇：consume,graph,random,phenomenon,subscribe,fuel,quantity,tend,per,data,catastrophe,flood,oppose,mild,consequence,state,range,glance,widespread,steady,steadily,tendenc
4、y,average,existence,outer,advercate,commitment,pollution,growth,electrical,casual,motor,can,circumastance,microwave,refresh,educator,contribution,presentation,nuclear,disagreement词组comeabout,subscribeto,quantitiesof,goup,resultin,evenif,beopposedto…,keepon,on
5、thewhole,onbehalfof,putupwith,solongas,andsoon语法“It”usedforemphasisItishumanactivitythathascausedthisglobalwarming.教案一WarmingUp,Pre-readingandComprehendingTeachinggoals1.Enablethestudentstotalkaboutdifferentsourcesofenergyandexpresstheirownideasabouttheuseofe
6、nergy.2.Enablethestudentstotalkaboutthecausesandeffectsofglobalwarming.Step1.WarmingupT:Asweallknow,wedependonenergytodomanythingsinourdailylife.Somepeopleevensaywecoulddonothingwithoutenergy.Doyouaggreewithme?Thenwheredoesalltheenergycomefrom?Openyourbooksan
7、dturntopage25.Lookatthepicturesonthispage.Theymayhelpyoufindouttheanswers.Sampleanswers:RenewableNon-renewableWindpowerCoalSolarpowerNaturalgasandoilHydroelectricpowerNuclearpowerStep2.Pre-readingLookatthepictureofgreenhouseonpage25.Whatisitinthepicture?☆Disc
8、ussthepre-readingpart1and2.(Greenhousegases:Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,includingcarbondioxide,methaneandwatervapor.)☆Thenwhatdoyouthin
