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1、根据本节教材用实验和猜测相结合的方法来说明生命起源的特点，教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。unit7toyourgoodhealth教案设计范例 Periodtwo Steppoints Infact,themoreyouuseyourbody,thebetteritworks. the＋比较级，the＋比较级，意思为“越……越……”。 [例]______youpraisehim,______heworks. A.More;theharderB.Themore;theharder C.Themore;harderD.Mor
2、e;harder (答案为B) Step2.Meaningthroughpractice theclassintogroups.Giveeachgroupalargepieceofpapertodrawthehumanbodyandwritethewordsanthebodyparts.Asthestudentsareworking,providethefollowingwordontheboard:heart,lungs,kidney,brain,stomach,liver,artery,veins,andbones. thatovercanbeaprepos
3、itionoraprefixthatcanbeaddedtoverds,adjectivesornouns.Theprefixcanmean:1.excessive2.outer,extra3.like“over”invarioussenses.意大利医生雷地证明腐肉不能生蛆的实验投影片，巴思德的“鹅颈瓶实验”投影片，原始地球的投影片，米勒实验的投影片。根据本节教材用实验和猜测相结合的方法来说明生命起源的特点，教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。 Discussthemeaningofeachprefix.Havethestudentsw
4、riteasentenceforeachword. Explainthatunderisalsoapropositionorprefixmeaning:1.below,beneath2.lowerinstatus3.incomplete Herearemoreexample:underclothes,underdog,undergraduate,underclass. 4.ListentothetapeanddotheEx. 5.Let’stalk:SentenceStressandRhythm. 6.Reviewthefollowingvocabularyb
5、eforereadingthedialogue:emphasize,de-emphasize, Step3.Writing Writeaninvitationtoadinnerpartywithamenu.Usethesampleshowninthetextasamodel. Usethemappingstrategytohelpthestudentsorganizetheirideas.Illustrateontheboardacirclewithlinesgoingoutfromthecircle.Thecirclerepresentshowtodevelop
6、ahealthlifestyle.Eachlinewillrepresentacomponentofahealthylifestyle.Ingroupshavethestudentsidentifythecomponents.Forexample:diet,physical,mental,social/emotional. Studentswillmakeachartthathasthecomponents意大利医生雷地证明腐肉不能生蛆的实验投影片，巴思德的“鹅颈瓶实验”投影片，原始地球的投影片，米勒实验的投影片。根据本节教材用实验和猜测相结合的方法来说明生命起源的特
7、点，教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。listedoneachsideofthecolumns.Undereachcomponentlisttheunhealthyandhealthyhabitsofparents,classmates,etc. Dividetheclassintogroups.Studentswillsharetheirlistofunhealthyandhealthyhabits.Asagroup,thestudentsmakea“Do”and“Don’t”chart.Remindt
