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Unit13We'retryingtosavetheearth!SectionA(3a-3b)TeachingAims>LanguagegoalsTohavetheawarenessofprotectingsharksandrespectingnature.>Keywordsandphrasesshark,fin9cruel,harmful,beharmfulto,atthetopof,chain,thefoodchain,ecosystem,industry,law9scientific>KeysentencesButdoyourealizethatyouarekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup?Butinfact用round70millionsharksarecaughtandtradedinthisindustryeveryyear.TeachingDifficultiesLetSshavetheawarenessofprotectingsharksandrespectingnature.TeachingAidsCAI,multimediacoursewareorotherrealiathattheTneedsfbrteaching>Forthethirdquestion,TcanaskSstoworkingroupsoffouranddiscussthequestion:Whatdoyouthinkmighthavecausedafallinthenumberofsharks?Later,TcanencourageSstosharetheiranswerstotheclass.TeachingProceduresTipsStep1WarmupWarmingup>ShowSspicturesofendangeredanimalsinChina.TcanencourageSstosaymoreendangeredanimalstheyknowandaskthemtothinkabout:Whytheseanimalsareendangered?Whatcanwedotoprotectthem?FreeTalk>TasksthefirsttwoquestionsandletSsanswer:Whatdoyouknowaboutsharks?Doyouthinksharksareendangered?Why?>LetSswatchavideoaboutsharks.TcanaskSstotalkabouttheirfeelingsafterwatchingthevideo.Step2Presentation&ReadingPre-reading>TeachSssomenewwordsandexpressionssuchassharkfinythefoodchainandWildAidusingthepicturesfromPPTP9-P13.>ShowSsanothervideoaboutcatchingsharksandgettingsharkfins,thenaskthemtocompletethesentencesonPPTP15andP16.Afterthat,TcanaskSstoanswerthequestions:Whatwillhappentotheshark?Whatshouldwedo?While-readingFirstreading>AskSstoreadthepassagesentencebysentence.TexplainsthenewwordsandphrasestoSs.Secondreading>ShowSsthequestionsonPPTP22andP23,letthemreadthepassagequicklyandfindfortheanswersfromthepassage.Answers:Sharksareatthetopofthefoodchainintheoceansecosystem.Yes,Ithinksharksareendangered.Becausewhenpeoplecatchsharks,theycutofftheirfinsandthrowthesharksbackintotheocean.Withoutafin,asharkcannolongerswimandslowlydies.Peoplecatchsharksandcutofftheirfinsandthrowthembackintotheocean.Withoutafin,asharkdies.Thirdreading3aAskSstocompletethechartbasedonthepassage.TmaywanttoaskSstodosomeadditionalresearchtofindoutmoreaboutsharksbeforethislesson.ThiswillenabletheSstohaveabetterunderstandingandgreaterknowledgeaboutsharks.Answers:(fromtoptobottom)southernChinaaround70milliontodeveloplawstostopthesaleofsharkfinsWildAidandtheWWF.3bTmaywanttocheckthatSsunderstandhowtocorrectlyusetheconjunctionsbeforehavingthemcompletetheactivity.Note:so:usedtosaythatsomethingisaresultofsomethingelsethathasjustbeenmentioned.although:usedtocontrastonepartofasentencewithanother;hastheeffectofmakingthemainideainthesentenceseemsurprisingorunexpected.if:usedtotalkaboutthecircumstancesinwhichsomethingelsemighthappen;givestheconditionforsomethingelsetohappen.but:usedtocontrasttwopartsofasentenceandshowthattheyareoppositeorverydifferentinmeaning(usuallynotusedatthebeginningofasentenceinformalwriting.)when:usedtotalkaboutthetimeat(orduring)whichsomethinghappens.Answers:1.when2.so3.but4.Although5.ifPost-reading>ShowthesummaryofthepassagetoSsandaskthemtofillintheblankswithproperwordsfromtheirmemory.BeforeTshowstheanswers,TcanaskSstochecktheanswerswiththeirpartnersfirstAnswers:(fromlefttoright,fromtoptobottom)southern,cruel,cutoff,swim,harmful,top>ShowSsavideoabout“Noeatingsharkfins”.TcantellSsthateverycreaturehasitsownvalueofexistence^peopleneedtoprotecttheanimalsandmaintaintheecologicalbalance.Step3Languagepointslearning“thenumbersof…”是"thenumberof..."的復(fù)數(shù)形式。thenumberof…與anumberof..?的區(qū)別是:thenumberof…的意思是"的數(shù)量","thenumberof+可數(shù)名詞復(fù)數(shù)”作主語時(shí),謂語動詞用單數(shù)形式。anumberof…的意思是“一些;若干”,"anumberof!■可數(shù)名詞復(fù)數(shù)”作主語時(shí),謂語動詞用復(fù)數(shù)形式?!癴allby”意為“下降by表示變化的幅度。fallto意為“下降到”。Step4Exercises^Summary&HomeworkExercises>DotheexercisesfromPPTP33-P35Homework>Readandrecitethepassagein3a.>Dotheexercisesinstudents5book.Inthisperiod,weshouldreviewthepresentprogressivetense,presentperfecttense,passivevoice,modalverbsandthestructure“usedto”inreadinga
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