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1、高二英语必修5 unit3教案（牛津版）本资料为woRD文档，请点击下载地址下载全文下载地址英语必修5译林牛津版Unit3第1课时表格教案主备人执教人授课日期班级总课题m5U3总课时分课时课型新授课题m5U3welcometotheunit教学目标.thinkmoreabouttherelationshipbetweenscienceandnature.2.describesomeitemsandatmospherewithscientificterms.3.expresstheiropinionsonclonedanimalsandhumansaswell.4.developanintere
2、stindoingmorereadingandresearchonthetopic.教学重点words,phrasesandsentencepatterns教学难点Practicalusage教具Blackboard,slidesandhandouts教学内容教法学法Teachingprocedures:Step1LeadinPlayadialogueaboutheight-increasingoperationsandaskstudentstofillintheblanks.Aftercheckingtheanswers,allowsometimeforstudentstofreelyexp
3、resstheiropinionsonheight-increasingoperations,thusintroducethemajortopic“scienceversusnature”。Explanation用一段有关增高术的听力引入主题，主要是考虑到这一切入点与实际生活较为贴近，比较容易让学生有话说，作为人类利用科学对自然的东西做出改变的一个典型例子可以顺其自然得引入本课主题。Step2Scienceversusnature.Explaintheword“versus”2.Brainstorming.Askstudentstothinkofothercasesinwhichscience
4、goesagainstnature?TheteachercanintroducesomenewvocabularylikeGmfoodandplasticsurgerywhichmightbeusefulinlaterteaching.Showsomepicturestohelpthembetterunderstandthesethings.Suggestedanswers:Gmfood,cloning,dams,artificialrainfall,organtransplant,air-conditioner,cloudseeding,plasticsurgery,euthanasia,e
5、tc.3.Allowstudentssometimetohavealightdiscussiononadvantagesanddisadvantagesofanyoftheabovecases.4.Intermsofscienceversusnature,whatdoyouthinktherelationshipbetweenscienceandnatureshouldbelike?Explanation本节将主题定位在“科学对抗自然”，让学生了解了这一关系后，用头脑风暴的形式让学生从增高术联想起更多的现实生活中能体现这一关系的案例，如转基因食品，人工雨等。Step3cloning.Displ
6、aypicturesofDollyandnormalsheeponthescreen.TellthemDollyisaclonedsheep.Butitlooksnodifferentfromnormalsheep.Showmorepicturesofclonedanimals.Theirnamescanbeintroducedhere,whichmightarousestudentsmoreinterest.2.Introducetheconceptof“copy”.Askthestudentstothinkaboutthisquestion:Areclonedanimalsexactlyt
7、hesameasthe“motheranimals”？（Theymayhavethesameappearancebuttheirphysicalqualitiescanbeverydifferent.manyclonedanimalsdiedatamuchyoungeragethanaverage.）3.Interviewonestudentabouthisfeelingtowardsclonedanimalsbyaskingthefollowingthreequestions:1)Ifyouhappentohaveaclonedcat,howwouldyoufeel?2)whatifanot
8、hercatwiththesameappearancecomestoyou?3)whatifmorecatswiththesameappearancecometoyou?4.Interviewanotherstudentabouthisfeelingtowardsa“clonedhim”.Thenasktheotherstudentsiftheywouldliketoseea“clonedhim”andwhy.5.Girlsversusboys.Askstudentstohavea2-minutedebateonwhetheritwouldbeagoodideatoclonehumanssom
9、eday.Explanation本节将讨论的重点转向克隆。通过图片展示的方式让学生对克隆动物有个感性的认识，并引进“拷贝”的概念，与第二课时的阅读标题形成呼应。Step4SummaryGiveabriefsummaryoftheirdebate.Pointoutanypossibleproblemsintheirdebatelikethelackofideasandsupportingpoints.Tellstudentsthatyouwillreadmoreaboutcloninginthefollowingperiodandwillhaveafurtherdiscussion.Explan
10、ation对学生的辩论进行简短的评价，一是评价学生的表现，二是让学生产生更多的兴趣去阅读，并且阅读的目的性更明确，从而能够保证阅读的成效。教后记：高考链接拓展阅读Tidesarecreatedmainlybythepullofthemoonontheearth.Themoonspullcauseswaterintheoceanstobealittledeeperatapointclosettothemoonandalsoatapointfarthestfromthemoonontheoppositesideoftheearth.Thesetwotidalwavesfollowtheappare
11、ntmovementofthemoonaroundtheearthandstrikenearlyeverycoastlineatin-tervalsofabouttwelvehoursandtwenty-fiveminutes.Afterreachingahighpoint,thewaterlevelgoesdowngraduallyforalittlemorethansixhoursandthenbeginstorisetowardanewhighpoint.Hence,mostcoastlineshavetwotidesaday,andthetidesoccurfiftyminutesla
12、tereachday.Differencesinthecoastlineandinchannelsintheoceanbottommaychangethetimesthatthetidalwavereachesdifferentpointsalongthesamecoastline.Tnedifferenceinwaterlevelbetweenhighandlowtidevariesfromdaytodayaccordingtotherelativepositionsofthesunandthemoonbecausethesunalsoexertsapullontheearth,althou
13、ghitisonlyabouthalfasstrongasthepullofthemoon.whenthesunandthemoonarepullingalongthesameline,thetidesrisehigher,andwhentheypullatfightanglestooneanother,thetideislower.Theformationofthecoastlineandvariationsintheweatherareadditionalfactorswhichcanaffecttheheightoftides.Somesectionsofthecoastareshape
14、dinsuchawayastocausemuchhighertidesthanareexperiencedinotherareas.Astrongwindblowingtowardtheshoremayalsocausetidestobehigher.Theheightofthetideisaffectedbyallofthefollowingexcept_.A.thepositionofthesunB.thedirectionofthewindc.variationsinthecoastlineD.channelsintheseabottom答案：D指导：潮汐的高度受太阳、风向和海岸线差异的
15、影响，海沟只影响潮汐的时间。由文中Differencesinchannelsintheoceanbottommaychangethetime.可知。2.Ifthepullofthesunequaledthepullofthemoon,tideswould_.A.sometimesbehigherthantheyarenowB.bethesameheightastheyarenowc.nolongerbeaffectedbythewindD.beofequalheightallthetime答案：A指导：太阳对地球的吸引力只有月亮的一半如果相同并作用在一个方向上，潮汐会比目前高。本题必须正确理解设问的意思3.Ifonehightideoccursat1:00a.m.,thenexthightideatthesamepointwilloccuratabout_.
