人教新课标高中英语必修二Unit 3 Computers教案(3).docx

Unit 3 Computers教案Unit3computersThe4thperiod:Listening&SpeakingGoALS:.Topractiselisteningcomprehension.2.TopractisemakingdecisionsandreasoningTEAcHINGPRocEDURES:Step1.revision.checkthehomeworkexercises.).IthasbeenreportedthatchildrenwillbeofferedfreeeducationIthasbeenreportedthatfreeeducationwillbeofferedtochildren2).IthasbeensaidthatwewillbeofferedthelatestcomputersciencecoursebookIthasbeenplannedthatthelatestcomputersciencecoursebookwillbeofferedtous3).IhavebeentoldbyPeterthatIwillbelenthisnotebookcomputerforaweekIhavebeentoldbyPeterthathisnotebookcomputerwillbelenttomeforaweek2.Question:whatcancomputersbeusedas?Step2.Lead-inAsweknow,scienceandtechnologyisdevelopingveryfastandcomputershavebecomesmallerandsmaller.Theyhavebeenusedinmanyfields.So,the21stcenturyisthecenturyofinformationtechnologywhatdoesitmean?Doesinformationtechnology/ITonlymeanthingslikecomputers?ofcausenot.Actually,putersarejustonekindofIT.whatelsedoyouknowispartofIT?Step3.Listening.Pre-listening:whatarethechangesbroughtbydifferentformsofIT?whataretheadvantagesanddisadvantagesofthem?2.while-listening:Gothroughthechartandmakesurethestudentslookatthechartbeforetheylistentothetape.ThenListentothetapeandfinishfillinginthechart.Say:Afterlisteningtotheirtalk,weknowallkindsofIThavebothdisadvantagesandadvantagesLetschecktheanswerstogether.TypeofITAdvantagesDisadvantagesTVyoucanbothlistenandwatchyoucannotwritetofriendswebyoucanfindinformationItisveryexpensiveRadioyoucanlistentoEnglishyoucannotwatchafilmBookyoucangetinformationSometimesitisoutofdate3.Post-listening:):decidewhichtypeofITisbestforyoutouserightnow.makeyourchoiceandgiveyourreasonsbyusingthefollowingexpressions.Ithinkthat.Inmyopinion,.Ibelievethat.Iagreebecause.Idisagreebecause.Ivedecidedthat.2):Discussion:computersareusefulandhavebroughtuslotsofgoodthings,buttheyalsocausebadeffects.whatattitudeshouldwehavetowardsthecomputer?Step4.Speaking.Pre-speakingSay:Fromwhatwehavelearn,weshouldadmitthatcomputersandthewebhaveagreatinfluenceontheschooleducationaswellaspeopleslife.Ithascomeintopeopleseverydaylifeandmanyfamiliesholdcomputersintheirhomes.Nowthereisataskforyou.2.while-speaking)Situation:youhavebeenaskedbyyourparentstohelpchoosecomputersforyourhome.youandyourfriendhavelookedatseveralcomputers.Talkaboutthespecialthingseachcomputercando.makeadecisionaboutwhichkindofcomputertobuyandexplainwhy.Informationinput:ShowstudentssomepicturesofdifferentcomputersLanguageinput:UsefulexpressionsSupportinganopinionchallenginganopinionIthinkthat,becausePerhaps,butwhatif/about?First,Haveyouthoughtabout?onereasonisthatwhatmakesyouthinkthat?IthinkitisbetterbecauseIdontlikeitbecause.Usetheexpressionstosupportyouropinionorchallengingothersopinions.2)oralreport:Doanoralreporttoyourfatherandstartyourreportlikethis:Ilookedatmanydifferentcomputers.TheoneIhavechosenisthePEPpersonalcomputer.oneofthemainreasonsisthatitissuitableforhomes.Ifoundthat3.Post-speakingconclusionwhatusefulexpressiondoweusetomakeadecisionandreason?Step5.Homework