冀教版九年级英语全一册《nit5LookintoScienceLesson29DNA-TheStoryofYou》赛课导学案5

Lesson29DNA---TheStoryofYou课题教课目标教课要点教课难点教法学法教具

Lesson29DNA---TheStoryofYou课型New课时One知识目标:Wordsandexpressions能力目标:UnderstandthearticlesaboutDNA.德育目标::Youareuniqueintheworld.一、要点词汇blueprint,general,complex,twins,pattern,identify,berelatedto,exceptfor.二、要点句型Ingeneral,ablueprintisadrawingthatshowshowtoputahousetogetherwithmanydifferentparts.IttakesmillionsofyearsfornaturetochangetheDNAinlivingthingstomakethemfittheworldtheylivein.定语从句Talk,listen,read,practiceTalk,listen,read,practicetapeslidesLesson29定语从句一、定语从句的观点二、定语从句的关系词板三、书课本中的例句设例1：计Ingeneral,ablueprintisadrawingthatshowshowtoputahousetogetherwithmanydifferentparts.例2：IttakesmillionsofyearsfornaturetochangetheDNAinlivingthingstomakethemfittheworldtheylivein.教课教程教师活动学生活动Step1.Greetings.设计企图：让学生做好上课的准备。TrytoanswertheStep2.Thinkaboutit.twoquestions.WhatdoyouknowaboutDNA?WhatcanscientistsdowithDNA?设计企图：与学生进行一个简洁的对话，进入本课主题。RelatepicturestoStep3.Showstudentssomepicturestoletthemknowsomethingaboutthenewwords.DNAandthenewwordsinthislesson.设计企图：经过展现图片让学生认识本课要点单词及DNA的知识。Step4.Readthelessonandanswerthequestions.1Whatisablueprint?Whichismorecomplex,buildingalivingthingorbuildingahouse?DosometwinshavethesameDNA?IsitpossibletochangeyourDNA?5.WhoseDNAisrelatedtoyours?Readthetext设计企图：让学生带着任务读课文。aloudandanswerStep5.LanguagePointsthequestions1.Aretheredifferencesbetweenyouandthem?你和他们之间有什么不一样吗?【辨析】between与amongbetween常用于二者之间，among一般指三者或三者以上.JacksitsbetweenLinTaoandBob.Iwasamongthecrowd.Letthestudents我处在人群中。writethe2.Youuseittobuildahouse.important你用它来建筑房屋。languagedown.use的用法usetodosth.用做某事Heisusingaknifetocutbread.他正用小刀切面包。【注意】use的形容词是useful，它是由use加后缀-ful组成的。如：Isthefridgeveryuseful?这台冰箱很实用吗？Letthestudents3.DNAisapattern,too.DNAwritethe也是一种模型。importanttoo表示“也”时,往常置于句末，其前用逗号分开。languagepoints【辨析】too与eithertoo与either都表示“也”，其差别是too用于一定句，down.表示“也”；either用于否认句，表示“也不”。它们往常都位于句末，其前用逗号分开。如：Hehasasister,too.他也有个小妹妹。Hedoesn’thaveaknife,either.他也没有小刀。4.Exceptforidenticaltwins,eachlivingthinghasitsownuniqueDNA.除了每对双胞胎以外，每个生物都有它独一的DNA。1)exceptfor除以外，不过Heisagoodmanexceptforhottemper.除了性情烦躁外，他是个好人。2)own的用法adj.自己的（用在全部格后边，增强语气）Shemakesallherownclothes.她全部的衣服都是自己做的。vt.有；拥有2Whoownsthebike?这辆自行车是谁的？Step6.ExercisesLetthestudentsdosomeexercisesaboutthekeypoints.设计企图：经过练习让学生稳固本课的要点知识。St