冀教版九年级英语全一册《nit5LookintoScienceLesson25LetsDoanExperiment》赛课导学案20

Lesson25Let’sDoanExperiment教课设计主备人：Ⅰ知识与技术:Masterywordsandexpressions:science,experiment,fill,proveOralwordsandexpressions:theory,jar,upside,observe,right,sideup,upsidedownⅡ教课目的:1.UsetheSimplePresentTense.2.ExpresscertaintyanduncertaintyⅢ教课要点:1.Learntoexpresssequence;2.Howtoexpressanexperiment.Ⅳ教课难点:ExpresscertaintyanduncertaintyⅤ教课方法:Listening,reading,andspeakingⅥ教课器具:jar,cardboard,waterⅦ教课过程：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做实验同义句：carryout/makeanexperimentIfillajarwithwater.我用水把瓶子装满。fillwith用装满(主语是人)同义句：befilledwith.../befullof...(主语是物)学生用书装满书包:Studentsfilledtheirschoolbagswithbooks.Theirschoolbagsarefilledwith/fullofbooks.Iturnthejarupsidedown.我把广口瓶倒过来。turnupsidedown把翻转、倒过来你能把这个玻璃杯倒过来吗？Canyouturntheglassupsidedown?反义短语：turnrightsideup把正面向上Youthinkthewaterwillpourout,Danny.丹尼，你以为水会洒出来。pour在本句中的意思是“涌流”。它还有“倒;下滂沱大雨：倾吐”的意思。Shepouredthericecarefullyintothepot.她谨小慎微地把大米倒入灌中。Therainhasbeenpouringallday.滂沱大雨下了一成天了。Youcanpouryourtroublestoaclosefriend.你能够向亲近朋友倾吐烦心事。5.Iamsosureofmytheory我.这样确信我的理论。besureof确信我确信他所说的。Iamsureofwhathesaid.Itisstrongenoughtoholdthewater压.力大到足以托住水。句中的enoughtodo意为“足以做某事”，这里的enough是副词作用，用在形容词或副词后作状语。Allanisoldenoughtogotowork.艾伦到上班年纪了。Step6.Summary:Theexperimentisthemainpartofthetext.Ifwehavetime,doitinclass.Ifthetimeinclassisn’tenough,letthestudentsdotheexperimentafterclass.Thenreporttheresulttotheclass.Theteachercand