高二英语Unit13Thewaterplanet教案背景知识：WaterPollutionWhatisnecessarytolifeonearth.Allorganismscontainit;someliveinit;somedrinkit.Plantsandanimalsrequirewaterthatismoderatelypure,andtheycannotsurviveiftheirwaterisloadedwithtoxicchemicalsorharmfulmicroorganisms.Ifsevere,waterpollutioncankilllargenumbersoffish,birds,andotheranimals,insomecaseskillingallmembersofaspeciesinanaffectedarea.Pollutionmakesstreams,lakes,andcoastalwatersunpleasanttolookat,tosmell,andtoswimin.Fishandshellfishharvestedfrompollutedwatersmaybeunsafetoeat.Peoplewhoingestpollutedwatercanbecomeill,and,withprolongedexposure,maydevelopcancersorbearchildrenwithbirthdefects.Themajorwaterpollutantsarechemical,biological,orphysicalmaterialsthatdegradewaterquality.Pollutantscanbeclassedintoeightcategories—petroleumproducts;pesticidesandherbicides;heavymetals;hazardouswastes;excessorganicmatter;sediment;infectiousorganismsandthermalpollution--eachofwhichpresentsitsownsetofhazards.Unit13ThewaterplanetTheFirstPeriodWarming-up,ListeningandSpeaking用心爱心专心121号编辑1课题SEFCB2Unit13Thewaterplanet课时7授课日期2007.3.8-2007.3.16教学目标1.Talkaboutwaterandtheocean2.Practicemakingsuggestionsandexpressingopinions3.ReviewModalVerbs4.Writeanexplanationparagraph教学重难点1.Someimportantwordsandexpressions2.Learntomakesuggestionsandexpressopinions3.GrammarModalVerbs教学用具1.arecorder2.ablackboard3.themultimedia4.somethingspecialfortheexperiments(eg.Oil,water,glass,icecube)TeachingAims:1.LearnandmasterthenewwordsandtheusefulexpressionsofthispartWords:cube,sailor,disadvantages,entertainmentPhrases:comeupwith,happentoUsefulexpressions:Thewaterisbeingusedto/for…Weshould/could…Ifwe…wecan…Itwouldbebetter…2.Learnsomethingaboutwaterbydoingexperiment.3.Dosomelistening4.Improvethestudents’speakingabilitybytalkingTeachingImportantPoints:1.Makethestudentsbefreetotalkaboutwater.2.Improvethestudents’listeningabilitybypractice.TeachingDifficultPoints:1.Howtofinishthetaskofspeaking.2.Howtoimprovethestudents’listeningability.TeachingMethods:1.Listening-and-answeringactivitytohelpthestudentsgothroughwiththelisteningmaterial.2.Individual,pairorgroupworktomakeeverystudentworkinclass.TeachingAids:1.themultimedia2.theblackboard3.anemptyglass,abottleofwaterandabottleofvegetableoilTeachingProcedures:1.Greetingsandlead-in1.Ihaveariddle.Pleaseguessit.It’swater.Todaywewilltalkaboutwater.2.Whatyouknowaboutwater?Maybeyoucanlearnmoreaboutwaterfromthefollowingexperiments.2.Listeninga)Youcanlistentothefamouspoemsaboutlifeontheocean.Beforeyoulisten,let’slearntwophrasesfirst.用心爱心专心121号编辑2It’sveryimportanttoalltheanimalsandplants.It’salsoimportanttohumanbeings.It’sliquidatroomtemperature.Everydayyoukeepintouchwithit.Youcan’tlivewithoutit.(athing)happentoeg.Whathappenedtoyoulastweek?Ifanythinghappenstothemachine,pleasetellme.comeupwitheg.Ihopeyoucancomeupwithabetterplanthanthis.b)Playthetapeforthefirsttimetogetthegeneralmeaningandwritedownsomekeywords.c)Playitforthesecondtime,pauseforstudentstowritedowntheinformation.d)Checktheanswers3.SpeakingInourdailylife,watercanbeusedindifferentways.Nowwe’lltalkaboutthewaysinwhichwatercanbeused.LookatthepicturesonPage18.Youcanchooseoneofthesixpicturestodiscusstheimportanceofusingandprotectingourwater.Whenyoudiscuss,youmayusethequestionstohelpyou.4.SummaryToday,we’remainlylearnedsomethingab...
