Unit2Arnwickwasacitywith200，000people.典案一教学设计Step1LeadinShowsomephotosofpopulationandhaveashortconversationwithstudents.(详见素材一导入二)Step2Prereading1．TeachthenewwordsbyPPT.2．Workinpairs.AskandanswerthequestionsinActivity1.(详见素材二活动一)Step3Reading1．LearnthemainideaofthepassageinActivity2withsomequestions.2．Playthetapetwiceandaskthestudentstolistenandread.3．TellthestudentstocheckthetruesentencesinActivity3.(详见素材三突破一)4．Letthestudentscompletethemindmaptograspthemainideaofthepassage.(详见素材三突破二)Step4Practice1．Playthetapeandletthestudentsreadafterit.2．AskthestudentstocompletethepassageinActivity4andthenreadthepassageseveraltimes.3．Choosetwostudentstoretellthepassage.(详见素材二活动二)Step5Writing1．Tellthestudentstoreadandchecktheproblemsthatexistintheirhometown.Thenletthemwritedownsomesuggestionstosolvetheproblems.Theteachercangivehelpwhennecessary.Onepossibleversion：Problem:Toomuchtrafficbringsairpollution.Opinion:Thisisanationalaswellasaninternationalproblem.Governmentineverycountryshouldtakemoremeasurestocontroltrafficpollution.Solution:Thegovernmentsshoulddeveloppublictransportationsothatpeoplewillnotusetheircarssomuchinthebigcities.2．Askthestudentstopractisewritingasimilarpassage.(详见素材四)Step6Languagepoints(详解见学案部分)1．quietadj.寂静的；安静的2．pollutionn.污染3．ThesmalllocalschoolinParkvillecloseddownfiveyearsago…帕克维尔当地的一所小学校在五年前关闭了……Step7Homework1．小作文：Howtosavewater?2．完成第18课时分层训练中“课内基础自测”的Ⅱ题和Ⅲ题。
