冀教版九年級英語全一冊《nit5LookintoScienceLesson25LetsDoanExperiment》賽課導(dǎo)學(xué)案20

Lesson25Let’sDoanExperiment教課設(shè)計(jì)主備人：Ⅰ知識與技術(shù):Masterywordsandexpressions:science,experiment,fill,proveOralwordsandexpressions:theory,jar,upside,observe,right,sideup,upsidedownⅡ教課目的:1.UsetheSimplePresentTense.2.ExpresscertaintyanduncertaintyⅢ教課要點(diǎn):1.Learntoexpresssequence;2.Howtoexpressanexperiment.Ⅳ教課難點(diǎn):ExpresscertaintyanduncertaintyⅤ教課方法:Listening,reading,andspeakingⅥ教課器具:jar,cardboard,waterⅦ教課過程：Step1.Teacherbringsthejar,cardboardandwatertotheclass.Showthemtothestudentsandaskwhatexperimentswecandowiththem.Letthestudentsshowthemandexplainthereasonstothestudents.Letthestudentsworkingroupsanddiscusstheexperiments.Whenonegroupisdoingtheexperiments,theotherscanaskthequestions.Theteachercanaskquestions,too.Step2.Nowletthestudentsopentheirbooksandguesswhattheexperimentis.AskthestudentstosayitinEnglish.Step3.Readthetextsilentlyandanswersthefollowingquestions..Whatkeepsthewaterinthejar?.IsJennysureofhertheory?Howdoyouknow?⑶.WhydoesDannyputonhisraincoat?.WhatdoesDannyconclude?Step4.Readthetextcarefullyandchecktheanswers.Explainsomewordsandexpressionstotheclass.Step5.Explainsomewordsandexpressionstotheclass.doanexperiment做實(shí)驗(yàn)同義句：carryout/makeanexperimentIfillajarwithwater.我用水把瓶子裝滿。fillwith用裝滿(主語是人)同義句：befilledwith.../befullof...(主語是物)學(xué)生用書裝滿書包:Studentsfilledtheirschoolbagswithbooks.Theirschoolbagsarefilledwith/fullofbooks.Iturnthejarupsidedown.我把廣口瓶倒過來。turnupsidedown把翻轉(zhuǎn)、倒過來你能把這個(gè)玻璃杯倒過來嗎？Canyouturntheglassupsidedown?反義短語：turnrightsideup把正面向上Youthinkthewaterwillpourout,Danny.丹尼，你以為水會灑出來。pour在本句中的意思是“涌流”。它還有“倒;下滂沱大雨：傾吐”的意思。Shepouredthericecarefullyintothepot.她謹(jǐn)小慎微地把大米倒入灌中。Therainhasbeenpouringallday.滂沱大雨下了一成天了。Youcanpouryourtroublestoaclosefriend.你能夠向親近朋友傾吐煩心事。5.Iamsosureofmytheory我.這樣確信我的理論。besureof確信我確信他所說的。Iamsureofwhathesaid.Itisstrongenoughtoholdthewater壓.力大到足以托住水。句中的enoughtodo意為“足以做某事”，這里的enough是副詞作用，用在形容詞或副詞后作狀語。Allanisoldenoughtogotowork.艾倫到上班年紀(jì)了。Step6.Summary:Theexperimentisthemainpartofthetext.Ifwehavetime,doitinclass.Ifthetimeinclassisn’tenough,letthestudentsdotheexperimentafterclass.Thenreporttheresulttotheclass.Theteachercand