英语人教版九年级全册unit13我们正在尽力拯救地球

1、Unit13Weretryingtosavetheearth第一课时一、教材分析本单元带领学生了解了一些有关地球污染，动物濒危等问题。并且教给大家如何保护濒危动物，如何通过回收利用等方式来保护地球。本单元分为sectionAandsectionB两个部分。本课为第一课时带领大家了解地球污染问题，以及探讨如何保护地球，减少污染。二、三维目标（一）知识与技能1. Tolearnthefollowingwordsandexpressions.bottom,coal,public,ugly,cost,advantage,method,cruel,harmful,afford.2. Toundersta

2、ndthepasageonPage99.（二）过程和方法3. Togetageneralknowledgeofpollutionbyreadingandrole-play.4. Toknowabouthowtoreducepollutionthroughdiscussion.（三）情感态度和价值观5. Afterlearningthispart,everystudentwillbeawareoftheserioussituationofpullutionanddeterminedtotakeactiontoprotectourearthfronnowon.三、教学重点1. Howtouseth

3、efollowingwordsandexpressions:cost,advantage,harmful,afford,usedto,playapartin2. tounderstandthepassageonPage99.四、教学难点1. Howtousethefollowingwordsandexpressions:cost,advantage,harmful,afford,usedto,playapartin2. tounderstandthepassageonPage99.五、教学策略根据本课教学目标和重点内容，教师可采用听，读，小组讨论，角色扮演等活动来引导学生进行学习。六、教学准备

4、ppt,recorder,mutiple-media七、教学环节1、课堂导入Step1Lead-in1）Showsomepicturesaboutpollutionandaskstudentstodiscusswhatsthedangerofeachkindofpollution.2）Herearesomewordsarerelatedtodifferentkindsofpollution.Writethemintheboxbelow,andyoucanaddmorewords.loudmusic,littering,buildinghouses,cars,ships,mobilephones

5、,rubbish,factories,planes,smoking.AirpollutionNoisepollutionWater3) Role-playthefollowingconversationandmakeyourownconversationsaboutthekindsofpollutionabove.A:Theriverwasdirty.Eventhebottomoftheriverisfullofrubbish.B:Butitusedtobesoclean.A:Yes,butpeoplearelitteringintheriver.B:Everyoneinthetownshou

6、ldplayapartincleaningitup.2、课堂讲授Step2.Reading1) Fast-readingNowturntopage99andreadthepagequicklytofindanswerstothesheet.QuestionsAnswersWheresharksfinsoupispopularSouthernChinaNumbersofsharkscaughtandtradedeveryyear70millionHowmuchthenumbersofsomekindsofsharkshavefalleninthelast20-30years.over90perc

7、entTwoenvironmentgroupswhichareagainstfinningWildAidandtheWWF2) careful-readingReadthepassageagainandfillinblanks.so,although,ifbut,when Manypeopledonotrealizetheyarekillingawholesharktheyenjoyabowlofsharksfinsoup. Sharksareatthetopofthefoodchain,iftheirnumbersdrop,theoceansecosystemwillbeindanger.

8、Manythinkthatsharksaretoostrongtobeendangered,theyarewrong. therearenoscienfiticstudiestosupportthis,alotofpeoplebelievethatsharksfinsaregoodforhealth. Sharksmaydisappearonedaywedonotdosomethingtostopthesaleofsharksfins.Possibleanswers:when,so,but,although,if3) Studyingusefulwordsandexpressions. cos

9、tv价钱为，花费n.价钱，代价；花费，费用Thecostofaloafofbreadhasincreasedfive-fold.一条面包的价钱增长了4倍。Badgesarealsoavailableatacostof2.50.徽章也有卖的，2.5英镑一枚。Itsgoingtocostmeover$100,000tobuynewtrucks.买几辆新卡车将花掉我10万多美元。 harmfuladj.对有害的；能造成损害的；不利；不良Smokingisharmfultoourhealth.吸烟对人类的健康有害。 usedtodo过去一向，过去时常，过去曾(而现在不再)做Whousedtodoyou

10、rlaundry?谁过去一直为你洗衣服？Sheusedtowashdishesinarestaurant.她曾经在餐馆里洗过盘子。 affordvt.买得起；担负得起；提供；给予Wecouldntaffordtobuyanewcar.我们买不起新的车。Wecantaffordtowait.我们等不起。Myparentscantevenaffordanewrefrigerator.我父母甚至买不起一台新冰箱。 playapartin扮演某角色；与有关，对有影响Idliketoplayapartintheirdiscussion.我愿意参与他们的讨论。Educationisplayingabigp

11、artinenvironmentalprotection.教育在环境保护中起着很大作用。HeplayedapartinhisfavoriteTVshow.他在他最喜欢的电视节目中扮演了一个角色。3、课堂练习Step3ExercisesTranslatethefollowingphrases:(1.)对有害(2.)买得起.(3.)在中起作用(4.)过去常常(5.)解决问题(6.)起作用(7.)听说(8.)在顶部(9.)在底部(10.)切下，割下4、课堂活动Step4ActivitiesInyourgroupmakealistofthingspeoplecandotohelptheenvironment.5、课堂小结Step5.SummarizeLookbackonwhatwehavelearned.1. Howtoprotectenvironment.2. Usefullanguages:beharmfulto,atthetopof,atthebot