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1、Unit5LookintoScienceLesson26KeeptheCandleBurning◆教材分析1.AnalysisoftheStudentsThestudentsofGrade9havemasteredcertainvocabularies，expressionsandstructures.Theyalsohavetheabilitiesofself-teachingandworkingingroups.MostofthemarewillingtoexpresstheiropinionsinEngli
2、sh.2.AnalysisofTeachingContentLesson26isthesecondlessoninUnit5,Book5.ThisunitfocusonthesubjectLookintoscience,alsoteachthestudentssomethingaboutscience.Studentscaresaboutthesubjectbecauseitisclosetoeveryone.Lesson26mainlytalksaboutlearntodoanotherexperiment.◆
3、教学目标【知识目标】1.Tomasterthewords:match,light,burn,useup,candleholder,shallow,oxygen,one-fifth.2.Tomastertheexpressions:doanexperiment,fill…with,cover…with,turn…upsidedown,be(not)sure…【能力目标】Improvethestudents’abilityofspeaking,listening,readingandwriting.Doandexpr
4、esstheexperiment.【情感目标】Studentscanenjoythepleasureofliterature.【教学重点】Theusageofprefer.【教学难点】Writeacompositiontodescribeaninterestingexperiment.◆课前准备◆Taperecorder,Multimedia◆教学过程Step1.Warm-upFreetalk:Thinkaboutit!1.Doyouthinkscienceisinteresting?Whyorwhynot?2.
5、NameoneortwofamousChinesescientists.Whatdoyouknowaboutthem?Step2.Presentation1.Doanexperiment.2.Showthepictureandtellstudentstheexperiment:KeeptheCandleBurning.3.Introducesomethingweneedintheexperiment,meanwhilelearnthenewwords.4.Guess:Whatdowedotheexperiment
6、?5.Readthetextandfillintheblanksonpage69.Let’sdotheexperimenttogether!Putthecandleinthecandleholder.Putthecandleholderonthedish.Fillthedishhalffullwithwater.Lightthecandlewitha_______oralighter.Whatcanyousee?Thecandleisburning.________thecandleburnfortwoorthr
7、eeminutes.Thencarefullyputthejaroverituntilthetopofthejarrestsonthedish.Asthecandleburns,it_______theoxygenintheair.Whenthecandlestops________,ithasusedupalltheoxygenintheair.Thewaterinsidethejar_______andfillsabout________ofthejar.Thisisbecauseaboutonefiftho
8、ftheairismadeupofoxygen.1.Checktheanswers.2.Guess:Whatishappening?Listentothetapeandanswerthequestion.3.Listenandfollowtothetape.4.Explaintheexpressionoffractions:(1)分数由分子和分母两部分构成。用英语表达时，
