Unit8We’retryingtosavetheearth!TheThirdPeriodSectionA3a–3c【Teachingaims】一、听、说、读、写以下词汇：method,cruel,harmful,low,industry,law,cutoff了解明白以下词汇及短语：shark,fin,chain,ecosystem二、通过学习，口、笔头掌握下列句型：1)Manyhaveheardofsharkfinsoup.2)Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.3)Thismethodisnotonlycruel,butalsoharmfultotheenvironment.4)Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.三、能读懂介绍关于保护鲨鱼的文章，完成相应的阅读任务，并能够正确运用连词或状语从句改写文章。四、通过了解鲨鱼的现状，增强保护濒危动物的意识。Difficulties：正确运用连词或状语从句改写文章。【Teachingsteps】Warm-upandrevision（课堂热身和复习）Showsomepicturesofanimalsthatareendangeredonthescreen.教学设计说明：激发兴趣；激活思维。Presentation（呈现新知识）1.Whatdoyouknowaboutsharks?Wheredosharkslive?__________________________________Aretheyallverybig?___________________________________Whatdotheyeat?___________________________________Isthenumberofsharksdecreasing?_________________________Whydopeoplecatchthem?___________________________2.Skimming速读文章，找出段落大意。Para1Badthingshappenwhenpeoplecutoffsharks’fins.Para2Environmentalprotectiongroupshavedonethingstoprotectsharks.Para3You’rekillingawholesharkwhenyouenjoyabowlofsharkfinsoup.2.ScanningTask1Workon3a.Readthepassageaboutsharksandcompletethefactsheet.WheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowmuchnumbersofsomekindsofsharkshavefalleninthelast20to30yearsTwoenvironmentalgroupsagainst“finning”Task2仔细阅读第二段，完成下面的句子。Badthingshappentosharkswhenpeoplecutofftheirfins.Whenpeoplecatchsharks,they_______theirfinsand_______theshark_______intotheocean.Withoutafin,asharkcannolonger________andslowly_______.Ifsharks’numbers________toolow,itwill________dangertoalloceanlife.Task3仔细阅读第三段，完成下面的句子。Somethingsthatenvironmentalprotectiongroupshavedone:They__________thepublicabout"finning".Theyhaveevenaskedgovernments_____________tostopthesaleofsharkfins.3.模仿秀:跟读模仿，注意语音语调。4.Workon3b.Readthepassageagainandfillintheblankswiththewordsinthebox.1.Manypeopledonotrealizetheyarekillingawholeshark___________theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,__________iftheirnumbersdrop,theocean’secosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,___________theyarewrong.4.________therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday_________wedonotdosomethingtostopthesaleofsharkfins.5.Summarizethearticleanddiscussitwithyourpartner.完成学习目标一、二。6.Groupwork:我们该如何保护鲨鱼？小组分工合作，完成一份关于保护鲨鱼的海报，并在课后展示。7.观察与思考：1)notonly…butalso…用于连接两个表示并列关系的成分，着重强调后者，意为_________；可与both...and…替换。若连接两个成分作主语，其谓语通常与_________保持一致。Otherexamples:NotonlydoeshespeakfluentEnglish,buthecanalsospeakChineseandFrenchwell.Exerciseisnotonlygoodforhealth,butalsofun.2)anumberof与thenumberof的用法：thenumberof意为“…的数量”，跟复数名词连用作主语时，中心词是number，谓语动词用单数。anumberof意为“许多”，相当于many，修饰可数名词复数。作主语时，谓语动词用复数。number前可用large，small等修饰，以表示程度。练习：选词填空：thenumberof,anumberof1.______________teachersinourschoolis350.2.______________teachersliketoreadbooks.完成学习目标三。Afterlistening1.小结。完成学习目标四。【家庭作业】必做：根据提示复述3a。选做：完善你们小组的倡议书。教学设计说明:分层布置作业，促进不同层次学生的学习积极性。
