1Lesson25Let’sDoanExperiment!教学目标:认知目标:掌握词汇及短语science/experiment/prove/theory/jar/observe/scientificmethod/fill...with.../turnupsidedown/rightsideup能力目标:1.Learnhowtoexpressthisexperiment.2.Learnhowtoexpresscertaintyanduncertainty.情感目标:1.培养学生爱动手爱动脑的良好习惯。2.培养学生科学探究精神和严谨的科学态度。教学重难点:1.重点:掌握本课重点词汇及短语,并能正确运用它们来描述实验过程。2.难点:Howtoexpresscertaintyanduncertainty.教具准备:多媒体课件、录音机、磁带、广口瓶、硬纸板、水教学方法:情景导入法、问题教学法、分组讨论法、讲授法教学设计:Step1.Warmingupandleadingin.师生问候。2.教师利用多媒体导课。Step2.Presentation.活动:做实验,体会如何描述实验过程。教师将已经准备好的广口瓶、硬纸板和水放在桌子上,然后,一边介绍一边做实验,让学生仔细观察并认真听语言描述,然后,让学生亲自惊醒实验操作,一边做一边用语言描述。Step3.Consolidationandextension.(一).认真听录音,捕捉对话中的关键信息,并完成以下各题。1.What’satheory?2.What’sanexperimentfor?(二).再听录音,进行扩展训练。1.WhydoesDannywanttodotheexperimentoutside?2.DoesDannyhavethesametheoryasBrain’s?3.Doyouthinkthecardboardcanholdthewaterinthejar?Why?(三).分角色朗读课文,加深对课文的理解。(四).对重点字词进行解析。1.fill...with...“用...装满...”Eg.(1)Fillthebottlewithwater.(2)Hefilledhiscasewithbooks.befilledwith.../befullof...“充满着...”Eg.Theroomisfilledwithheavysmoke./Theroomisfullofheavysmoke。2.sbbesure+that从句“认为...,确定...”sbbenotsure+疑问词引导的从句“不确定...”Eg.Tomissurethathewillwinthegame.Eg.I’mnotsurewhenhe’llcomehere.3.observevt.“观察,监视”2observesb/sth;observesbdo/doingsth;Eg.(1).Hehasobservedthestarsallhislife.(2).Iobservedhimgointohishouse.(3).WhenIpassedbythegrass,Iobservedhimwalking.Step4.Exercises.Step5.Summary.1.掌握重点字、词和短语。2.掌握sbbesure+that从句和sbbenotsure+疑问词引导的从句。3.重述实验步骤。Step6..Homework.1.Dotheexperimentbyyourselvesafterschool.2.Writeashortpassagetoexpresstheexperiment.板书设计Lesson25Let’sDoanExperiment!1.Warmingupandleadingin2.Newwords.3.Howtodotheexperiment4.Languagepoints