九年级上仁爱版英语Unit4Topic2WhenwasitdevelopedSectionD教案Themainactivitiesare1aand3.本课重点活动是1a和3。Ⅰ.Teachingaimsanddemands教学目标1.Learnnewphrasesandusefulexpressions:aslongas,runaway,inshortInshort,thisrobotisveryusefultous.2.Sumupthesimplepastpassivevoice.3.Talkaboutnewtechnologiesandinventions.Ⅱ.Teachingaids教具讲解GPS的有声多媒体课件(没条件的就用小黑板事先写好)/标有发明物的卡片/录音机Ⅲ.Five-fingerTeachingPlan五指教学方案Step1Review第一步复习(时间:13分钟)1.(师生互动，带学生一起复习归纳本话题的语法及语言点。激发学生的兴趣，培养学生的口语表达能力。)T:Howareyou,boysandgirls?Ss:Fine,thankyou.Andyou?T:I’mverywell.Sofar,wehavelearnedsomethingaboutthenewtechnologiesandinventionsintheworld.Doyourememberthemall?Ss:Yes,welearnedthelightbulb,thecar,thecellphone…T:Veryclever.Butwhocantellmewhenthelightbulbwasinvented?Andwhoinventedit?S1:Itwasinventedin1879.S2:I’mnotsure,butitwasinventedbyThomasEdison.T:Doyouremembertheplar?Ss:Yes.T:Whenwasitinvented?Ss:Around2008.T:Wherewasitinvented?Ss:I’mnotsure.MaybeitwasinventedinKangkang’shome.T:OK,verygood.(板书)Whenwasitinvented?Around2008.Wherewasitinvented?Itwasinvented…(出示手机的卡片)T:Whenwasthecellphoneinvented?S3:Itwasinventedin1973.T:Wherewasitinvented?S4:ItwasinventedinAmerica.2.(紧承上面的话题，以手机为切入点，导入新课。)T:Cellphonesarewidelyusedallovertheworld.It’sreportedthatover93%offamiliesincitiesowncellphones,butcellphonesarelosteasily.Haveyouwatchedthemovie“AWorldWithoutThieves”?Ss:Yes.T:Inthemovie,alotofcellphoneswerestolenby“LiuDehua”.Nowadays,oneofthenewtechnologiescanbeusedtofindthelostcellphoneseasily.Isitamazing?OK,let’sread1candthinkaboutthequestion:Whycouldthepolicecatchthethiefeasily?(板书并解释)runaway逃跑，失控(一分钟后)Haveyoufinishedreading?Doyouwanttoknowtheanswer?Well,let’sbeginthenewlesson.Step2Presentation第二步呈现(时间:10分钟)1.(播放多媒体，简介GPS，让学生了解其意义，展示GPS的背景知识。)T:Lookatthescreen.GPSisshortfortheGlobalPositioningSystem.(板书)globaladj.全球的，世界的GPS=theGlobalPositioningSystemGPSislikeman-made“stars”.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Theearlyexplorersusedthestarsaslandmarkstoknowwheretheywereandinwhichdirectiontheyweregoing.Butthismethodworkedwellatnightaslongastheweatherwasgood.(板书并解释。)landmarkn.aslongas…只要Thismethodworkedwellatnightaslongastheweatherwasgood.2.(让学生打开课本，播放录音。要求学生认真听录音的同时，注意划出关键词。教师板书。)T:Boysandgirls,justnowItalkedsomethingaboutGPS.Nowlet’slistentothetapetolearnapassageaboutGPS,andunderlinethekeywords.(板书)question,explorers,landmarks,findout,direction,aslongas,problem,like,use,shape3.(让学生阅读1a，然后讨论下列问题，四人一组。完成1b。)Questions:1.Whatwouldyoudoifyoulostyourwayinaforest?2.Howdidtheearlyexplorersknowwheretheywere?3.WhatisGPS?Isitusefultous?4.WhatdoyouthinkGPSwillbeusedforinthefuture?(学生讨论完后，小组长要整理好答案汇报。教师抽查部分小组的答案，再归纳总结。)Step3Consolidation第三步巩固(时间:8分钟)1.(根据板书的关键词来复述1a，分男、女两组竞赛方式，激发学生的兴趣，熟悉所学的知识。)T:Boysandgirls,let’sbeginourcompetition.question.Girls:Thatwasabigquestionwhenwefirstexploredourworldlongago.T:explorers.Boys:Theearlyexplorersfoundthatthestarsintheskyweregoodlandmarks.T:findout.Girls:Usingthestars,theycouldfindoutwheretheywereandinwhichdirecti...
