SectionBThemainactivitiesare1aand2.本課重點活動是1a和2。Ⅰ.Teachingaimsanddemands教學目標1.Learnsomenewwordsandphrases:sand,cutdown,change…into…,prevent,prevent…from,although,cutoff,leader2.Learntotalkaboutpollutionanditsharm.3.Reviewtheindefinitepronounandadverb.Ⅱ.Teachingaids教具錄音機/圖片Ⅲ.Five-fingerTeachingPlan五指教學方案Step1Review第一步復習(時間:10分鐘)1.(收集上節(jié)課布置的作業(yè)，把寫得好的貼在學校的板報上或教室的墻上，教師展示圖片，讓學生判斷是好的行為還是壞的行為，并復習不定代詞和不定副詞。)(教師示范，然后讓學生描述。)T:Lookatpicture1.Istheclassroomtidy?Ss:Yes.T:Theclassroomistidy.Nobodythrowslitterabout,soit’sagoodbehavior.(讓學生分組討論。)T:Now,pleasediscussthepicturesingroups.T:Lookatpicture2.Whataboutthispicture?Group1: Thepandaiscrying.Ithasn’tenoughfoodtoeat.Someonemustdosomethingbadtodestroytheenvironment.Soitisabadbehavior.T:Verygood!Whataboutpicture3?Group2:Somechildrenaremakingloudnoise.It’sabadbehavior.T:Theymaydisturb…Group2:Theymaydisturbothers.T:Great!Whataboutpicture4?Group3:Someonethrowslitterabout.Soit’sabadbehavior.T:Good.Whataboutpicture5?Group4:Agroupofchildrenareplantingtrees.Everyoneshouldplantmoretrees.It’sagoodbehavior.(圖片6許多樹被砍掉。)T: Lookatthepicture.Isitgoodbehaviororbadbehavior?Ss:It’sbadbehavior.T:Why?Ss:Everyoneshouldplantmoretrees.T:Yes.Butpeoplearecuttingdowntrees.(板書)cutdown砍掉T:Treescanstopthewindfromblowingtheearthaway.Andtheycanpreventthewaterfromwashingtheearthaway.(教師解釋“prevent”heremeans“stop”。)(板書)prevent…form=stop…fromT:Ifpeoplecutdowntoomanytrees,whatwillhappen?(教師展示圖片7。)Ss:Thelandwillchangeintodesert.T:(教師指著圖片。)It’sapictureofdesert.(板書)changeinto,desertT:Whywilltherichlandchangeintodesert?S1:Withouttrees,windwillblowtheearthaway.S2:Withouttrees,waterwillrunaway.T:You’reright.Thelandwilllosewaterandtheearth,leavingonlysand.(教師釋義領讀sand一詞。)T:Fromthepictures,weknow,althoughwehavedonesomethingusefultoprotecttheenvironment,it’snotenough.Weshouldworkharder.(教師釋義，重復讀although。)Step2Presentation第二步呈現(xiàn)(時間:8分鐘)1.(聽1a錄音回答問題。)T: Listentothetape,answerthequestionsontheblackboard.(板書)(1)What’stheweatherliketoday?(2)Whatshouldwedotoprotecttheenvironment?2.(聽錄音后，教師提問學生，完成黑板上的問題。)T: Whocananswerthefirstquestion?S1:…S2:…3.(讓學生分成小組，讀1a，提出不懂之處。小組內(nèi)討論解決各自提出的問題，最后全班共同討論解決。用此方式可以讓學生充分參與到教學過程中來，進行自主探究學習，教師做補充講解。)T:OK,pleaseworkingroups.Talkaboutthelanguagepointsanddifficultpointswithyourpartners.I’llasksomestudentstogiveyourresultstoclass.(板書)1.Ican’tseeanything.2.cutdown3.change…into…4.stop/prevent…fromdoingsth.5.Although…/…but…Step3Consolidation第三步鞏固(時間:7分鐘)1.(讓學生跟讀1a錄音，并注意語音語調(diào)。)T:Now,pleasereadafterthetape.Andpayattentiontothepronuciationandintonation.2.(讓學生兩人一組表演這個對話，稍后檢查活動成果。)T:Pleaseworkwithyourdeskmates.Afterawhile,I’llaskseveralgroupstoactoutthisdialog.GA:…GB:…3.(在上述練習的基礎上，讓學生試著復述對話。)T: Now.I’llasktwostudentstoretellthedialoginyourownwords.Forexample:WhileKangkangwaswalkingdownthestreetjustnow,hisfacehurt,becausethewindisblowingstronglywithlotsofsand.Hecan’tseeanything.Whatcausesthebadweather?Becausepeoplehavecutdowntoomanytrees.Treescanstop…4.(讓學生看1b的圖片，完成1b。)T:Let’slookatthepicturein1b.Makesomenotesaccordingto1aaboutthepicturebyyourselves.(教師讓學生完成后，讓學生一個接一個地把自己寫的答案讀出來。)T：Pleasereadyournotesonebyone.S1: …5.(有了以上關于污染問題知識的積累，學生能兩人一組很容易地完成1c。然后教師核對答案。)T:Wehaveknownmoreaboutpollution.Doyouknowtherelationamongtrees,manandsandstorms?OK.Letusfinish1c.Step4Practice第四步練習(時間:10分鐘)1.(教師展示一條被污染的河的圖片，引出2中新的詞匯。)T: Lookatthepicture.Whatcanyouseeintheriver?Ss: Wecanseesomewasteintheriver.T: Isthewasteharmful?Ss:Yes,ofcourse.T: T: Canpeopledrinkthewaterintheriver?Ss:No.T:Sowehavetocutoffpeople’swatersupply.(教師做切斷的手勢幫助學生理解。)(板書并講解。)cutoffT:Youknow,therewon’tbelivingthingswithoutwater,waterisimportanttohumanbeings,too.Andweshouldaskthegovernmenttopayattentiontoit.Weshouldlettheleaderscareforit.(教師解釋，重復讀leader。)(教師讓學生讀2中的材料，討論后編出一份有關內(nèi)容的對話。)T:lookatthematerialsin2,pleasemakeadialogaccordingtothematerials.ForexampleA:S1:What’sthereportabout?S2:It’saboutpollutionoftheSonghuaS1:WhathappenedtotheSonghuaS2:Harmfulwastefromachemicalfactorypollutedit.S1:Whatdiditcause?S2:ItcausedHarbincitytocutoffitswatersupplyforfivedays.S1:Oh,it’stoobad.Didtheleadersknowit?S2:Yes.Theleaderspaidhighattentiontothisevent.S1:Howimportantthewateristohumanbeings!S2:Yes,let’sprotectitfromnowon.S1:OK.Let’sbegreenerpeopletogether.Step5Project第五步綜合探究活動(時間:10分鐘)1.(結合課本上2里呈現(xiàn)的現(xiàn)實生活中所發(fā)生的不幸事件，讓學生討論水的重要性，可聯(lián)系八年級上的第四單元來做此項討論?？梢栽偻卣沟饺绾喂?jié)水？為什么節(jié)水？節(jié)水可以為我們帶來什么好處？)T: OK.WeknowanunluckyaccidenthappenedintheSonghuaRiveronNovember23,2022.ThisterribleaccidentmadeHarbincitycutoffitswatersupplyforfivedays.Waterisveryimportanttohumanbeings.What’stheimportanceofwater?Howshouldwesavewater?Whydowesavewater?What’stheimportanceofsavingwater?(討論完后匯報結果。教師不要限制學生的思維，應盡量讓他們說出自己獨到的見解。)2.Homework:(1)Findoutmoreinformationaboutwater.(2)Trytofindmorewaysofsavingwater.