人教新目标版九上英语Unit6SectionB（3a-SelfCheck）【教案】

Unit6Whenwasitinvented?SectionB（3a-SelfCheck）TeachingAims1.语言能力：写一段话来介绍和推销自己的发明。2.文化意识：鼓励学生保持对科学发明探索的兴趣。3.思维品质：学习多角度地介绍一种发明。4.学习能力：用一般过去时的被动语态介绍一种发明，包括发明的时间，被谁发明的以及发明的目的。TeachingDifficulties用一般过去时的被动语态介绍一种发明。TeachingAidsmultimediacoursewareorotherrealiathattheTneedsforteachingTeachingProceduresTipsStep1WarmingupTellasimplestoryaboutaboywhosegrandfatherhasAlzheimereasilygetlosttoSs.AskSsiftheyweretheboy,whattheywoulddo.Aboywasgrowingupinafamilywiththreegenerations.Hehasalwaysbeenveryclosetohisgrandfather.However,hisgrandfatherisaAlzheimerpatient.Oneday,hisgrandfatherwaswalkinginaparkwithhim,butsuddenly,hisgrandfathergotlost.Hesaidthatwasoneofthescariestmomentinhislifeandhewantedtofindoutsomewaytokeephisgrandfather’ssafe.Ifyouweretheboy,whatwouldyoudo?Showtheboy’svideotoSs.Askthemwhattheboydidtokeepthesafeofhisgrandfather.AskSstocompleteachartabouttheinventionthatmentionedinthevideo.(Tip:InordertohelpSsfinishthetaskbetter,TcanshowthischartbeforewatchingthevideoandaskSstotakenoteswhilewatching.AfteralltheSshavefinishedthetask,TcanaskSstochecktheiranswerswithapartner.)LetSsworkinagroupoffour.Askthemtothinkaboutthequestions:Doyouthinkthepressuresensorsockisuseful?Ifyouwereabusinessman,wouldyouliketosellthisinventiontoothers?Howwouldyouintroduceittoyourcustomer?AskSstowriteashortpassagetointroducethepressuresensorsock.Tcanshowthemtheflowchartofwriting.Encourageeachgrouptosharetheirwritingstotheclass.Step2Presentation&PracticePre-writing3aAskSstothinkofsomethingthattheydon’tliketodo.Thenthinkofaninventionthatcouldhelp.(Tip:ItwouldbeveryeasyforSstothinkaboutoutrageoussolutionsforwhattheydon’tlikedoing.Encouragethemtothinkaboutpracticalsolutions.Thisisnottosaythattheycannotthinkoutofbox.Theyjustneedtomakesurethattheirrecommendedsolutionsdonotinvolvetheimpossible.)While-writing3bSupposeSsarebusinessmen,askthemtowritedescriptionsfortheirinventions.(Tip:TcanusetheflowchartonPPTP9tohelpSsorganizetheirwritings.ShowSsthesamplewritingifnecessary.)Post-writingsDivideSsintoseveralgroups,askSstoreadtheirpassagesinthegrouponebyone.Askeachgrouptovoteforthebestpassage,theninvitetheSwhowrotethe“bestpassage”toreadhis/herpassagefortheclass.SelfCheckExercise1AskSstocompletethepassagewithcorrectformsofthewordsinthebox.Answers:invent,allofasudden,doubt,websites,mentionExercise2AskSstorewritethesentencesusingthepassivevoice.Answers:1.Mywatchwasstolen(bysomeone).Fiveeggswereused(bythem)tomakethisbigcake.Whenwasthepersonalcomputerinvented?Wewereaskednottoruninthehallway.Thevideowastakenbacktothestore(bysomeone).Exercise3AskSstofindoutmoreinformationaboutaninventiontheywouldliketoknow.(TcanaskSstolookupforinformationabouttheinventiontheywanttoknowathomeandsharewithotherinnextclass.)Step3Summary&HomeworkSummaryAskSstodotheexercisesfromPPTP19-22.HomeworkPreview1a-1cinUnit7.Dotheexercisesinstudents’book.TeachingReflectionThisisthelastperiodoftheunit.Itisimportanttogetthestudentstousewhattheyhavelearnedintheunitto