英语必修三外研版 Module4 Sandstorms in Asia导学案.doc

导学案BookThreeModule4SandstormsinAsiaSection1Introduction&speaking（第1课时）一、学习目标1、通过自主阅读课文能够认识并掌握课文中的新词汇。2、通过课堂合作探究能够用英语谈论沙尘暴的起因和预防沙尘暴的措施二、学习重难点学习重点：能够认识并掌握课文中的新词汇。学习难点：能够用英语谈论沙尘暴的起因和预防沙尘暴的措施三、学法指导1.课前30分钟自主学习完成预习学案。找出自己的疑惑和需要讨论的问题用红笔做好标记。2.课上25分钟高效讨论展示答案3.课上10-15分钟答疑解惑。4.课后20分钟巩固学习四、学习内容：Introduction&speaking五、学习过程课前预习【自主学习】同学们在本部分中你要掌握这些单词和短语请自主阅读教材P31然后把它们找出来。（部分单词出现在后面的学习中需要提前掌握）（一）Words：英汉互译（方法引导：默写单词然后核对答案用红色笔写出正确答案并在再加以巩固）1、沙尘暴__________2、吓人的___________3、内陆的__________4、last（v）_________5、dig__________6、protect____________7、sign________8、ocean___________9、prevent_______10、region______11、expert_________12、describe_________13、bury_______14、blow_______15、host/hostess_______（二）Phrases：翻译成汉语(方法导引：按音标正确读背单词和短语)1.cutdown___________2.digup________3.blowacross____________4.inlandregion_________【合作探究】Step1TurntoP31andfinishactivity1.blowburyfrighteninglast(v)sandstormTherehasbeena__________.It___________fortenhoursandwasvery__________.Thewind___________thesandhigharoundthehousesandsomecarswerealmostcompletely______bythesand.Step2Discussthesestatementsanddecidewhichstatementisfalse.()1.Sandstormsbeginindesertareas.()2.Desertsarecreatedbyclimatechanges.()3.Desertsarealsocreatedbecausepeoplecutdowntreesanddigupgrass.()4.SandstormsfromAsiahaveblownacrossthePacificOceantoAmerica.()5.Sandstormscan’tbeprevented.()6.Theinlandregionhasmoresandstormsthantheonenearthesea.Step3Workingroupsanddiscusswhatcausedsandstorms.Thefollowingpicturesmayhelpyou.Thereishightemperatureandlittle_________.______People_________toomanytreesand_________grass.Therearemorepopulationandless_________.______.Thelandbecomes__________._____Think:Arethereanycauses?Step4Lookatthesepictures.Nowworkinpairsanddiscusswhatweshoulddotopreventsandstormscoming.Thefollowingp