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必修三unit4reading导学案讲课教案.doc

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必修三unit4reading导学案【学习目标】：1.Tolearnsomeusefulwordsandexpressionsinthetext.2.Tolearnthedevelopmentoflife.3.Toimprovesomereadingskills,andlearntheorganizationofthetext.4.TrainSs’interestsinscienceandstimulatetheirloveforastronomy.【教学重点】：1.GettheSstoknowthedevelopmentoflife.2.Toimprovethestudents’readingability.【预习案】一、Warming-up:discusswithyourpartner,andanswerthefollowingquestions.1.Howmanyplanetsarethereinoursolarsystem?Whatarethey?____________________________________________________________________________________2.Whyistheearththeonlyoneofalltheplantsonwhichlifecansurvive?____________________________________________________________________________________3.Doyouknowwherearewecomefrom?Whoareourancestors?____________________________________________________________________________________二、Skimming1.Lookatthetitleofthispassage,canyoupredictwhatthepassagewillbeabout?2.Writedownthetopicsentenceofeachparagraph.Paragraph1:__________________________________________________________________________Paragraph2:__________________________________________________________________________Paragraph3:__________________________________________________________________________Paragraph4:__________________________________________________________________________Paragraph5:__________________________________________________________________________3.Thetextcanbedividedintothreeparts,fillintheblanketsbelow.Part1(para__):_______madeitpossibleforlifebegintodevelop.Part2(para__-para__):The________oflife.Part3(para__):Thedevelopmentof______.【探究案】一、DetailedreadingSlowlycombineAviolent______ball1.Readpara1-2,competethefollowingchart._______dustBigBangAcloudofdustMaketheearth’s__________Produce______and_____________withfireandrock2.Readpart2andputtheorderofdevelopmentoflifeintoatimelineaccordingtothetext.1.Insectsandamphibiansappeared.2.Dinosaursappeared.3.Theearthbecameasolidball.4.Smallplantsgrewondryland.5.Reptilesappeared.6.Plantsbegantogrowondryland.7.Theearthwasacloudofdust.8.Waterappearedonthe