高中英语：Unit4 Astronomy-the science of stars教案（新人教版必修3）VIP专享VIP免费

Unit4Astronomy:thescienceofstars教案Teachingaims:1.Talkaboutthescienceofstars2.PractisegivinginstructionsTeachingdifficulties:1.Learntousenounclausesasthesubject2.Learntowriteanessaytoshowyourproblemsandthewaytoovercomethem.3.Vocabulary:astronomy,atmosphere,violent,explode,surface,disappointed,gradually,cheer,mass,harmful,presence,intime,prevent…from…dependon,nowthat,getthehangof,breakoutTeachingprocedures:ThefirstperiodIntensivereadingStepⅠPresentationT:Hello,everyone!TodaywewillcometoUnit4,Astronomy.BeforethatIhaveaquestion:wheredowecomefrom?Orwecansay:Whoareourancestors?S1:Monkeys!S2:BeijingRenwholivedmanyyearsago.S3:dinosaurs…T:Verygood!Doyouknowwhatitwaslikebeforelifeappearedonearth?S4:Fullofwater…Bs:Idon’tknow.T:Doyouwanttogetmoreinformation?Ss:Yes,wedo.T:Todaywewilllearnsomethingabouthowlifebeganonearth.Turntopage25.Let’scometoWarmingupfirst.StepⅡWarmingup1.Readthethreequestions,whilethestudentslistenandfollow.用心爱心专心2.Givethestudentsseveralminutestodiscussthequestions.3.Collectanswersfromtheclass.4.Checkanswerswhilediscussing.StepⅢPre-readingGetthestudentstodiscussthequestionsonpage25withtheirpartners.Thenaskthestudentstotelltheirstories.Encouragethemtotelldifferentstories,Iftheydon’tknowany,tellthemsome.T:Nowdiscussthesequestionswithyourpartners.ThenIwillasksomeofyoutotellusyourstories.Areyouclear?Ss:Yes.a.Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?Giveanexampleifyouknow.b.Doyouknowwhatascientificideais?Readsomestoriestothestudents.Panguseparatestheskyfromtheearth;TheBiblicalAccount;India;Japan;Europe;…StepⅣReading1.ScanningGetthestudentstoreadthepassagequicklyandaccuratelyandmeanwhilehelpthestudentstoformagoodhabitofreading.Givethestudentsacoupleofminutestolookthrouththewholepassage.Tellthemtoreadsilentlyandthenasksomedetailedquestionsaboutthetext.Encouragethemtoexpresstheirideas.T:Wearegoingtolearnapassageabouthowlifebeganontheearth.Nowreadthetextquicklyand用心爱心专心thenanswermyquestions.a.Whatwasthereontheearthbeforelifebegan?b.Whydoscientistthinktherehasneverbeenlifeonthemoon?c.Whydoanimalsfirstappearinthesea?d.Whydogreenplantshelplifetodevelop?e.Whyweremammalsdifferentfromotheranimals?Discusstheanswerswiththewholeclass.2.SkimmingInthispart,studentswillreadthetextagainandfinishpart1,2,3T:Nowskimthepassagefasttofinishpart1,2,3,4Thenwewillchecktheanswerstogether.Keytopart1:DBIGEHACFJDiscusstherestwiththestudents.StepⅤListeningListentothetapeforthestudentstofollowandhavefurtherunderstandingofthepassage.T:Readafterthetape,thenanswermesomequestionswithyourbookclosed.a.Howdidwatercomeintobeingontheearth?b.Whyiswaterimportantonearth?StepⅥLanguagepointsT:Turntopage25.Let’slookatthesentences:a.Itexplodedloudlywithfireandrock,whichwereintimetoproducethewatervapour.Whichleadsnon-restrictiveattributiveclause.intime:soonerorlater;eventuallyIwillseehimintime.Intime(forsth/todosth):notlateShewillbebackintimetopreparedinner.In/outoftime:in/notinthecorrecttime用心爱心专心Theaudienceclappedintimetothemusic.b.Nobodyknewthatitwasgoingtobedifferentfromotherplanetsgoingaroundthesun.Bedifferentfrom:notlikesomeoneorsomethingelseinoneormorewaysCitylifeisquitedifferentfromcountrylife.c.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.Tocome:servesasattributiveSheisthelastpersontod...