高中英语全英教案 4页

高中英语教案I.Teachingfocus1.Realizethedamagecausedtotheworldandfigureoutthereasons.2.Findwaystostoptheearthfrombeingpollutedbydiscussingingroups.II.TeachingapproachesElicitation,MutualInteractionIII.TeachingaidInteractivemultimediateachingIV.TeachingprocessStep1Revision1.Checknote-makingEarth:notenoughrain,toomanycattle,cuttingdowntrees,strongwindsAir:smokefromfactories,powerstations,cars,chemicalrain,accidentsatpowerstationsandfactoriesWater:wastefromfactoriesandcitiesStep2Presentation1．Presentaseriesofimagesdepictingthenaturalbeautyoftheearth,thenthepollution.Highlightthesharpcontrastbetweenthem.Guidethestudentstotheconclusion:Theearthusedtobemuchmorebeautifulthannow;theearthisindangerduetotheincreasingpollution.2．Studythemaponthetextbook,thenscanthepassagestofigureoutwhereontheworldatlasthedamagehashappened.Encouragethestudentstogiveouttheirpointofviewtowardthepollutionissue.Step3AudiovisualLearningThestudentswatchavideoonthetext,thendothefollowingtrueorfalsequestions.1.Manypartsoftheworldwithlargepopulationandplentyofcropshavebecomedeserts.T2.Landmaybecomepooriffarmersdonotlimitthenumbersoftheircattle.T3.Goodsoilisgraduallylostthesedaysastreesarebeingcutdown.T4.Airpollutionandwaterpollutionarethetwocausesoftheproblemthatmanypartsoftheworldhavebecomedeserts.F5.Chemicalsinthesmokefrompowerstationscantravelhundredsofmilesinthewindbeforefallingdowntothegroundintherain.F6.Afterabadaccidentatanuclearpowerstation,50%ofthetreesinGermanyweredamaged.F7.ThewritertoexplainhowwaterispollutedusestheexamplesoftheaccidentsinbothIndia\nandRussian.F8.Onceoceansarepolluted,theyarenotabletocleanthemselves.FStep4IntensiveReadingReadthepassagesagainforsomedetailedinformation1.Tosaysomethingaboutthedamagethatiscausedtotheworldbypollution,usingtheinformationfromthetext.Trytopresentpossiblewaystohelpsolvetheproblems.PhenomenaCausesSuggestionsEARTHTheareaofdesertisgrowingeveryyear.Cattleeatgrass.Limitthenumberofthecattle.Goodsoilisgraduallylost.Treesbeingcutdown;strongwindsblowingthevaluablesoilaway.Plantmoretreesandtrytoprotectthem.AIRAirisbeingpolluted.Factories,powerstationsandcarsproducealotofwaste.Alotofthingshavetobedonetoreducepollution.Newlawsshouldbepassedandpeopleshouldrealizehowserioustheproblemis.AlotofpeoplediedfrompollutedairinbothRussiaandIndia.Therewereseriousaccidentsthatpollutedtheair.Treesintheforestaredestroyedandfishinthelakesarekilled.Chemicalrain.WATERInsomeplacesit’snolongersafeforswimming,norisitsafetoeatthefish.Factoriesandcitiesproducealotofwaste.Sameasabove.LakeBaikal,whichusedtobecleanestItheworld,snowpolluted.Wasteproducedfromachemicalfactory.2.tosummarizethetextbygivingthemainideaofeachpassage.\nEarth:Theareaofdesertisgrowingandgoodsoilisgraduallylost.Air:Chemicalsinthesmokecausealotofdamageandseriousaccidentstookplacefromtimetotime.Water:Waterpollutioniscausedbyman’swaste.Thewatersofthisgreatlakehavebeendirtiedand4800squarekmofoceanwerepollutedbyoil.Step5DiscussionAppointonestudenttohostthediscussion.Therestoftheclassfallintogroupsof4,changingideasonthefollowingquestion.(1)Whatkindofpollutioncanyouthinkof?(2)Whytreesareimportant?(3)Whatarethecausesofwaterpollution?(4)Whatcanbedonetostoplandfrombecomingintodesert?(5)Whatelsedoweknowabouttheproblemsthattheearthisfacing?(6)Whatstepsshouldwetaketosavetheearth?Step6RoleplayThestudentstaketurnstoplaytheroleofanewspaperreporter,makinginterviewswithheadsoffactories(e.g.Apapermakingfactory)whichareseriouslypollutingairand/orwater.Recordtheinterviewsandcomposeareport.Step7Assignment（1）Readtheadditionalmaterialsaboutpollutionanddothereadingcomprehensionexercises.（2）Finishthereport.Thanksforattendingthisclass!_____________________________________________________________________________--__资料我国环境污染现状令人担忧据专家估计，中国每年因环境污染造成的损失达到二千八百三十亿元人民币，其中，仅水污染一项，估计一年造成经济损失约五百亿元。\n据香港《东方日报》报导，自六十年代至今，中国有环境监测的四百三十二条大小河流中，八成受到不同程度的水体污染，其中大江河经过城镇河段的占二成，支流受污染的占六成，全中国二千八百多个湖泊，凡能接纳城镇污水的，大多出现水体负氧化现象。由于地下水过度开采，京津沪大面积出现土地沉降一点五公尺至二公尺，桂林溶岩区三十米地下水重金属超标十至二十倍。大气污染造成的经济损失约为二百亿元，由于城市燃煤、工厂排放废气及汽车死气污染，大气中二氧化硫、一氧化碳等有毒悬浮微粒弥漫在城市上空，空气污染导致许多城市肺癌死亡率增至万分之二，全国酸雨覆盖面积已达百分之三十，所有这些损失加起来也等于二百亿元。而生态环境破坏和自然灾害造成的损失估计高达二千亿元，森林覆盖率由四九年的三成左右，现已下降至不足一成四，草原的严重退化，水土流失面积达一百五十五万平方公里，占国土面积的百分之十六。同时，城镇建设却仍以每年侵占一百五十万公顷土地的速度发展，破坏自然生态平衡，加上自然灾害带来的损失，每年至少损失二百亿元。其他污染如固体废物排放、噪音污染等造成的损失也高达一百三十亿元。专家分析表示，造成环境污染引起的经济损失原因众多，但国家工业规划布局失误，调控措施不力和公民环保意识不强是主要原因。我的体会；学习了该教案后，我总结体会两点。一、该教案在教学设计上非常注重学生能力的培养，充分利用教材和多媒体手段逐步引导学生理解课文，并能进一步升华课文的主题，使学生受到心灵的启迪和道德的震撼。一切都水到渠成。二、教案所附资料可在课堂中充分被学生利用，使他们的讨论言之有据，会使他们更乐于知识的学习和掌握。这点可以作为我今后很好的借鉴