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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