江苏省新沂市第二中学高中英语《Unit3Welcometotheunit》教案新人教版必修5教学目标1.Toarousestudents’interestintheunittopic2.Tohelpstudentsknowmoreaboutcloningtechnology3.Toencouragestudentstoparticipateinthediscussionrelevanttocloning重点1.Toarousestudents’interestintheunittopic难点3.Toencouragestudentstoparticipateinthediscussionrelevanttocloning教法及教具Listening,Discussing教学过程教学内容个案调整教师主导活动学生主体活动Step1Brainstorming1.AskstudentstoreadthetitleoftheunitScienceversusnature.Drawstudents’attentiontotheword‘versus’.Tellthemthat‘versus’isusuallyusedwhendiscussingsportscompetitionsorthelaw,whichmeansthattwoteamsorsidesareagainsteachother.Encouragestudentstothinkwhy‘versus’isusedhere.Askstudentsthefollowingquestions:e.g.:Doyouthinkthereisconflictbetweenscienceandnature?Whatmighttheconflictbe?2.Showapictureofthefirstclonedmammal,Dolly.GivesomeintroductionaboutthecreationofDolly.Tellstudentsthisnewtechnologyiscalled‘cloning’,whichproducesanexactcopyofananimaloraplantfromitsowncells.3.LeadstudentstolearntheunitwhilethinkingabouttherelationshipbetweenthetitleoftheunitScienceversusnatureandcloningtechnology.Step2Sharinginformation1.Showthefollowingfivepicturesonebyone,eachofwhichshowsasuccessfullyclonedanimal.Astothefivepictures,weconductthefollowingactivities.(Picture1)theworld'sfirstclonedadultanimal.ThescientistswhoclonedDollyaretostopexperimentsinvolvinggeneticallymodifyingpigsforhumanorgantransplantsbecauseofconcernsthatdeadlynewdiseasescouldbepassedontopeople.(Picture2)Theworld'sfirstclonedpigswereproducedfromanadultfemalepigusingadifferenttechniquefromtheonethatproducedDolly.(Picture3)TellstudentsthatthekitteninthepictureiscalledCc.Itsnameisfrom‘Copycat’.ScientistsintheUSAcreateditwithacelltakenfromitsmother,Rainbow.ItwasborninDecember2002.(Picture4)ThenameoftheclonedmonkeyisANDi.Itisfrom‘insertedDNA’speltbackwards.Itisthefirstgeneticallymodifiedmonkey.ThetechnologyisdifferentfromthatusedforDolly.Step3Discussion1.Doyouthinkgovernmentsshouldpasslawstoprohibithumancloning?Whyorwhynot?PartATheyshouldn’tfor…Reasons:1.Cloningcanhelpcuremanydiseasesandsavealotofpeoplelives.2.3.PartBTheyshould,for…Reasons:1.Cloningcanleadtoethical(伦理)problems2.3.GivinganoralreportTodayourclasshadadiscussionaboutwhetherthegovernmentsshouldpasslawstoprohibithumancloning.Somestudentsthinkthatthegovernmentsshould,for…However,someotherstudentsthinkitnecessarytoprohibit…,for…Inmyopinion,…Step4HomeworkAssignstudentstosurftheInternetorrefertoothersourcesforfurtherinformationrelevanttocloningtechnology,soastofinishthefirsttwoquestionsbelowthepictures.Askstudentstomakeasmanynotesaspossible.板书设计教学札记
