九年级英语上册《Unit 4 Amazing Science》Topic2 SectionB 教案 仁爱版VIP免费

九年级英语上册《Unit4AmazingScience》Topic2SectionB教案仁爱版Themainactivitiesare1aand3a.本课重点活动是1a和3a。Ⅰ.Teachingaimsanddemands教学目标1.Learnsomenewwords:clone,experiment2.Goonlearningthesimplepastpassivevoice:(1)Doyouknowwhenitwasinvented?(2)Itwasinventedin1879.3.Learnsomeinformationabouttheclonetechnology.(1)Cloningisfamousthroughouttheworld.(2)ThereisDNAinmostlivingthings,includinghumanbeings.(3)Nodoubtcloningcanhelpsavethoseanimalsindanger.(4)Anditcanalsobenefithumanbeings.Ⅱ.Teachingaids教具录音机/多媒体课件/图片Ⅲ.Five-fingerTeachingPlan五指教学方案Step1Review第一步复习(时间:6分钟)做游戏，复习一般过去时被动语态的用法，导入新课。1.(用上节课的作业做一个链式游戏，以小组为单位，就计算机、MP3、CD、手机、数码相机或学习用具等进行对话，操练bemadeof/bemadein/bemadefrom/beusedfor的用法。让每一小组的第一个同学回过头去问下一位同学，依次接着往下问。)T:Boysandgirls.Let’splayagame.Askquestionsonebyone.S1:What’syourfavoriteinvention?S2:AnMP3.What’sitmadeof?S3:It’smadeofsteelandplastic.Whenwasitdeveloped?S4:Itwasdevelopedaround1998.What’situsedfor?S5:It’susedforhelpingustoimproveourEnglish.…2.(用多媒体出示图片，导入新课。)T:Youdidverywell.Therearemanyimportanttechnologiesandinventionsintheworldtoday.Lookatthisinvention.(展示灯泡图片。)It’sabulb.Doyouknowaboutit?(板书并要求学生了解。)bulbSs:Yes,alittle.T:OK,whoinventedit?Ss:ThomasEdison.T:Whenwasthelightbulbinvented?Doyouknow?Ss:No.T:OK,let’scometo1aandlearnaboutit.Step2Presentation第二步呈现(时间:17分钟)通过谈论各种发明及其发明者和发明的时间，呈现1a和3a的内容，继续学习一般过去时的被动语态及生词。1.(让学生听1a录音并根据听力内容判断正误。)T:Inthislesson,wewilllearnsomethingaboutotherinventionsandtechnologies,pleaselistento1aandmarkTrue(T)orFalse(F).(1)Thelightbulbwasinventedin1879.()(2)TheradiowasinventedbyThomasEdisonin1895.()(3)TheairplanewasinventedbyWilburandOrvilleWrightin1903.()(听后核对答案：(1)T(2)F(3)T。)2.(用图片继续谈论上述发明，引入3a。)T:Nowlet’sgoontalkingabouttheinventions.Lookatthepicture!(出示收音机的图片。)Whoinventedit?T:ItwasinventedbyGuglielmoMarconi.(呈现收音机的发明年份和发明者的名字。)T:Andwhenwasitinvented?Ss:Itwasinventedin1895.T:Verygood.Andlookatthispicture.(展示一幅飞机的图片。)Whoinventedit?(同时呈现飞机发明年份和发明者的名字。)Ss:ItwasinventedbyWilburandOrvilleWright.T:Andwhenwasitinvented?Ss:Itwasinventedin1903.T:Wehavetalkedaboutsomanyinventions.Nowwearegoingtolearnsomethingnewaboutagreattechnology.(拿出图片。)Nowlookatthispicture.Whatanimalisit?Ss:It’sasheep.T:Yes,itisasheep,anditisaclonedsheep.Haveyoueverheardofclone?(教师释义并领读clone，要求学生掌握。)cloneSs:Yes,ofcourse.T:That’sverygood.Cloningisafamousexperimentthroughouttheworld.Sofar,scientistshaveclonedmanyanimalstosavethoseanimalsindanger.Thecloningtechnologyhasbeenusedinhumanorgans.Itcanbenefithumanbeings.(板书并让学生掌握生词experiment；了解benefit和organ。)experiment,organ,benefitT:Thenwhat’sthenameofthefirstclonedsheep?Ss:Dolly.T:Yes,nowlet’sread3aandanswerthefollowingquestions.3.(指导学生阅读3a，回答下列问题并核对答案，为完成3b作铺垫。同时画出文中的关键词及短语，为下一环节的课文复述作准备。)(板书下列问题。)(1)Whenandwherewastheclonedsheepcreated?(2)Whatotherthingshasmancloned?(3)What’susedincloning?(4)Whatareadvantagesanddisadvantagesofcloning?(板书关键词及短语。要求学生理解AIDS。)Dolly,becreated,famousthrough...