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Unit5LivinginharmonyMoreReading(The4thPeriod)教学目标：知识目标：1、学习并使用阅读技巧中的跳读(scanning)技巧，了解文章的重要事实与细节；2、应用略读(skimming)技巧了解文章的大意；3、能根据课文内容推测作者的真实意图;4、开展拓展性活动，以活动和阅读相结合的方式，理解课文，深化主题。5、学会文章中出现的词汇和主要句型。情感目标：1、培养学生细心观察的品质。2培养学生的环境保护意识，认识到整个生态环境对人类生存的重要性。学习策略：运用各种阅读技巧理解文章，在读的基础上进行写作训练。教学重点和难点：读写结合，在完成阅读的基础上，形成写作练习。掌握文章出现的语言基础知识。教学过程：StepIPre-readingGivethestudentsaseriesofpicturesonthedestructionstotheearth.Weshoulddosomethingtohelptheenvironment!StepIIReading1)Skimming:Readthepassagetodecidewhichofthefollowingsaretrueornot.1.Buyinggreenproductsishelpfultotheenvironment.2.Thereisthickozonelayeraroundtheearth.3.Allmanufacturershaveswitchedtootherlessharmfulchemicals.4.Theozonelayercanpreventtheharmfulraysfromthesun.5.Ifyouchooseozone-friendlyproducts,you’llsupportthegreenmovement.6.Notallthepeopleareawareoftheimportanceofprotectingtheenvironment.2)CarefulReadingReadtochoosethebestanswers.1.Whichcountrysuffersmostfromthegrowingofholesintheozonelayer?____A.AustraliaB.ChinaC.CanadaD.USA2.Theholesofozonelayersarecommonlyrelatedtothefactorsexcept______.A.air-conditionersB.refrigeratorsC.WastegasfromcarsD.aerosolcans3.Theproductsinthepicturebelowarefeaturedas_______.A.lowpricesB.containingnoorlessCFCsC.beinghelpfultocureskincancersD.doingnoharmtoskins4.Thefollowingstatementsaretrueexcept____.A.Anyproductscanbelabeledwithsignslike“NoCFCsor“ozone-friendly”.B.ordinarycustomerscan’thavethechoiceof“noCFCs”air-conditionersrightnow.C.Toprotecttheenvironment,youshouldnotbuyoruseair-conditionersD.Bothindividualsandfactoriescandosomethingtoimprovetheenvironment.5.Toomuchharmfulraysfromthesunmay____.A.causetoomuchsnowfallorrainfallB.causeskinproblems3)DetailedReadingAnswerthefollowingquestionsusingtheinformationintheleaflet.1.Whatisonewaywecanhelpprotecttheenvironment?2.Whathasbeenharmingtheozonelayer?3.Whatcanhappenwhentheozonelayergetsdestroyed?4HowdoweknowthatsomeaerosolcansdonotuseCFCs?5What“green”productscanyoubuytohelpprotecttheozonelayer?4)Readingstrategy:Letthestudentsfinishtheflowchart.StepIII.Post-reading1)DiscussionApartfrombuying“green”products,whatotherthingscanindividualsdotohelpsavetheenvironment?2)Writing根据下面的提示，以“AirAroundUs”为题，写一篇短文。（字数：100－120）提示：(1)空气无色、无味、无嗅，但我们可以感觉到它的存在，因为风就是流动的空气。(2)没有空气人和生物不能生存，声音不能传播，飞机不能飞行。(3)空气中除水蒸气外主要含有氮气(nitrogen)和氧气。其中氮气约占78%，氧气约占21%。几乎所有生物都需要氧气，没有氧气就不能燃烧。StepIVLanguageStudy1.短语的识记及背诵。1.意识到2.对…的威胁3.以负责的态度4.支持5.采取行动6.支持这项事业7.薄薄的一层8.保护…免遭9.在南极10.部分的11.被认为是…12.进一步研究13.被释放到…14.转而2.重点句型和短语的讲练：1.Readthisleafletdescribingoneway________youcanhelptheenvironment.2.We_______________themanythreatstotheenvironmentandtheneedtoactinaresponsiblemannertoprotecttheworldwhichweallshare.3.Manypeoplesaythattheyare___________the“greenmovement”.4.AroundtheEarththereisathinlayerofozone,akindofgas________________manyoftheharmfulraysoftheSun.5.Furtherresearchintotheproblemshowedthattheozonelayer_______________bygasescalledCFCs.6.__________________________,manymanufacturershavestoppedproducingaerosolcansthatuseCFCs.7.Thenyou___________somethingtohelptheenvironment.StepV.Homework1、全面复习本单元，包括词汇，表达法，语法，以及学习策略。2、完成单元过关训练。