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Un it5Look into Sci enceLesson29DNA—The Storyof You单词blueprint,general,plex,twin,copy,repeat,pattern,identify,related,grandson词组in general,millions/billions of,except for,the same...as...,not only...but also...,related to知识目标句型In general,a blueprintis adrawing thatshows howto puta housetogether withmany differentparts.But building a livingthing isfar moreplex thanbuildingahouse.Except forsome twins,every livingthing hasits ownunique DNA.技能目标能听懂本课时的听力材料,能说出本课时的重要句型,能运用句式用英语谈论学习方法掌握文中重点短语和句型能够熟练掌握本课general,copy,not only...but also…等单词及短语的用法Step1Warming up图片导入提问Do you and thestudents nearyou lookthe sameWhat isthe sameAre theredifferences betweenyouandthem然后出示本班相貌差别较大的两名学生照片,并问Do youthink theylook similarDo you know theyare cousins激发学生浓厚的兴趣,自然而然地引出课题Why dosome studentslook differentAnd whydo cousinslook similarBecause ofDNA.板书Lesson29DNA—The Storyof You.Step2Listening Listento thetape twicewith thefollowing questions.l.In,a blueprintis adrawing.general
2.some twins,every livingthing hasits ownunique DNA.Except for
3.You haveyour ownunique DNA,but itpatterns fromyour parents9DNA.repeats设计意图播放课文内容的录音,目的是激发学生兴趣,使学生锻炼听力,同时使学生在脱离汉语干扰的情况下,用英语思维去理解课文Step3Reading Readthe textand answerthese questions.
1.Where does your DNAe fromYour parents.
2.1syourDNA inevery partof yourbody Yes,it is.
3.What canscientists do with DNAFrom yourDNA,scientists canidentify not only you,but alsopeople whoare relatedto you.设计意图阅读课文,根据课文内容做任务型阅读,目的是让学生熟练掌握课文Step4Explain thelanguage notesof thetext tothe class
1.1n general通常,一般而言,总之
2.except for除...以外,只是
3.millions/billions of几百万/数十亿
4.not only...but also…不但...而且...,连接两个相同的成分,也可连接两个分句not only…but also…连接两个并列主语时,谓语动词和后面主语保持一致;not only...but also…连接两个并列分句,notonly置于句首,通常用倒装结构,也就是说,把notonly引导的分句中的助动词或be提到主语前面设计意图讲解语言知识点目的是让学生掌握文中重点短语、句型及其用法
5.relate to涉及,有关Step5Practice DoExercise2Lets DoIt”.设计意图做与语言点相关的练习,复习巩固所学知识,起到及时反馈的作
1.What didthe policethat aidentA.deal inB.deal withC.dowithD.do about
2.My articleis goodsome spellingmistakes.A・except B.except forC.Beside D.besides答案l.C
2.B完成请完成《少年班》P20对应习题本课时以问答形式与学生互动来导入新课,引出课时的中心一What doyouknowabout DNA这样既增长了学生关于what引导的特殊疑问句的知识,又锻炼了学生的思考能力。