Unit 3 Computer 教学设计.docx
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Unit 3 Computer 教学设计.docx
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Unit3Computer教学设计
Unit3Computer教学设计
Unit3Computer教学设计Period1:
WarmingupandreadingTeachingAimsTotalkaboutcomputerToreadaboutcomputerProceduresI.WarmingupWarmingupbytalkingaboutcomputerLookatthepicturesonpage17.Whatarethey?
Whatdotheyhaveincommon?
Yes,theyarecomputers.Thenwhatisacomputer?
Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.计算机室Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’soperatingsystemanddata.Computerprogramscanbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedataandemailacrosstheworld.曙光3000巨型计算机Acomputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;thesematerialswillbecometoxicwastewhendisposedof.Whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.Insomecountriesoldcomputersarerecycled(melteddown)togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.Computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Thismakestheproblemworse.Computerrecyclingisthuscommon.Manyprojectstrytosendworkingcomputerstodevelopingnationssotheycanbere-usedandwillnotbecomewasteasquickly.Computerjargon计算机行话Computerjargonmeanswordstodowithcomputersandsurroundingtopics.Knowingwhatthesewordsmeancanhelpyouknowmoreaboutcomputers.Somepeopleusethesewordstoimpressotherpeople(Alsoknownasbuzzwords).Examplesofjargon:
Bit-Thesmallestdataunit,caneitherbea“0.”ora“1.”.Byte-unitofdata.SeealsoKilobyte,Megabyte,GigabyteandNibbleCPU�CCentralProcessingUnit,AnothernameforprocessorData-InformationstoredonacomputerDisk-Aplacetostoredata.Email-Electronicmail.GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.Load-GetdatafromadiskNibble-HalfaByteSave-PutdataonadiskRAM�Crandom-accessmemory(随机存取存储器),themorethebetter.USB-UniversalSerialBus(通用串行总线,一种简化了插接多种附件的薄型插座)WWW-WorldWideWeb,partoftheInternetII.Pre-reading1.QuestioningandansweringWhatdoyouknowaboutcomputer?
●Electronicmachinecapableofperformingcalculationsandothermanipulationsofvarioustypesofdata,underthecontrolofastoredsetofinstructions.Themachineitselfisthehardware;theinstructionsaretheprogramorsoftware.Dependinguponsize,computersarecalledmainframes,minicomputers,andmicrocomputers.Microcomputersincludedesk-topandportablepersonalcomputers.●Amulti-functionelectronicdevicethatcanexecuteinstructionstoperformatask.●Adevicethatacceptsinformation,processesit,andsuppliesanoutput.Acomputerusuallycontainsmemory,acontrolunit,arithmeticandlogicalunits,andameansforinputandoutput.●aprogrammablehardwarecomponentthatiscontrolledbyinternallystoredprogramsandthatcanperformsubstantialcomputations(includingarithmeticandlogicoperations)withouthumanintervention.Acomputertypicallyconsistsofoneormoreprocessingunits,memoryunits,andassociatedperipheralinputandoutputdevices.●Relatedtoautomationandelectronicdataprocessing.TheLibraryofCongresscommonlyclassesmostcomputer-relatedbooksinHF5548,QA75-76,Z52,T385,andsomeTKranges.●amachineforperformingcalculationsautomaticallycalculator:
anexpertatcalculation(oratoperatingcalculatingmachines)●Acomputerisadeviceormachineformakingcalculationsorcontrollingoperationsthatareexpressibleinnumericalorlogicalterms.Computersareconstructedfromcomponentsthatperformsimplewell-definedfunctions.Thecomplexinteractionsofthesecomponentsendowcomputerswiththeabilitytoprocessinformation.Ifcorrectlyconfigured(usuallyby,programming)acomputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifacomputerconfiguredinthiswayisgive2.DiscussingandsharingHowhavecomputerschangedourlives?
Somedaysoon,ifyouhaven’talready,you’relikelytoplugintothecomputernetworknationgrowinginourmidst.Computerterminals,orsmallcomputersconnectedviamodem(amodulator/demodulatorcircuitforencoding/decodingcomputerchatter)toordinarytelephonelines,shouldbeasubiquitousasthetelephoneitself.They’reamuchmoreusefulandhumanetoolthanthephone,andwithcorporateAmericabehindthemthenetworkswillbeeverywhere----changingourlivesmorethananytechnologysincetheautomobile.Joiningacomputernetworkisthesameasjoiningacommunity.Smallsystemsarelikevillages,wherenewmembersareformallywelcomed.Thelargernetworks,theSourceandCompuServe,forexample,arecities-anonymous,fulloflifeandevents,butdifficulttofitinto.III.Reading1.ListeningandreadingtotherecordingofthetextWHOAMI?
Turntopage18andlistenandreadtotherecordingofthetext.Payattentiontothepauses,pronunciationandintonationofthenativereader.2.ReadingaloudandunderliningexpressionsNowwearetoreadthetextonceagainandunderlinealltheexpressionsinthetext.Putthemdownintoyournotebookafterclassashomework.CollocationsfromWHOAMI?
beginas…,acalculatingmachine,bebuiltas…,atthattime,atechnologicalrevolution,thestartofartificialintelligence,writeabook,bemadetowork,solveproblems,fromthenon,growanylarger,Astimewentby,gobackto…,bemadesmaller,memorybecamesolarge,standtherebyoneself,beconnectedby…,shareknowledgewithothersthrough…,beputinto…,providehumanswith…,dealwith…,trulyfilledwith…3.Reading,identifyingandsettlingAttention,please!
Itistimetoskimthetextonemoretimeandidentifythedifficultsentences.Tryanalyzingthestructuresofthedifficultsentencesanddiscussthemamongyourgroupmembers.Youmayalsoputyourquestionstomeforhelp.Chat(online)(在线)聊天Tochatistotalkaboutordinarythingsthatarenotveryimportant.Youcanchattoonepersonortomanypeople.PeoplealsousethiswordnowforpartsoftheInternetwherewecantalkwithmanydifferentpeopleatthesametime.Usually,youchatontheinternetinachatroomormessagingservicelikeAOL(AmericanOn-Line)InstantMessenger(AIM),YahooMessenger,orMSNMessenger.IV.Comprehending1.Scanthetextforinformationtocompletethetablebelow,describingthedevelopmentofcomputer.In1642Thecomputerbeganasacalculatingmachine.In1822TheanalyticalmachinewasmadebyCharlesBabbage.In1936Thecomputergrewrapidlybothinsizeandinbrainpower.1940sThecomputerhadgrownaslargeasaroom.In1960sThefirstfamilyofcomputerwasconnectedtoeachother.In1970sComputerswereusedinofficesandhomes.NowComputersconnectpeopleallovertheworldTogether.2.Readthetextagainandcompletethechartbelow.Paragraph1Paragraph2Paragraph3TopicsentenceOvertimeIhavebeenchangedquitealot.Thesechangesonlybecamepossibleasmymemoryimproved.Sincethe1970smanynewapplicationshavebeenfoundforme.SupportingdetailsCalculatingmachineAnalyticalmachineUniversalmachinePClaptoptubestransistorschipsnetworkworldwidewebcommunicationsfinancetraderobotsmobilephonesspacerocketsprovidingalifeofhighquality
Period2:
LearningaboutLanguageTeachingAims:
TolearntouseThePresentPerfectPassiveVoiceTodiscoverusefulwordsandexpressionTodiscoverusefulstructuresProceduresI.WarmingupbyreadingtothetapeTobeginwith,turntopage18,listeningtoandreadingtotherecordingofthetextWHOAMI?
Attentiongoestothepausesandintonation,aswellasthepronunciationofthereader.II.DiscoveringusefulwordsandexpressionsInpairsdotheexercises1,2and3onpages20.Youmustfinishthemin10minutes.III.Learningaboutgrammar1.PassiveVoice―OverviewTenseorModelPassiveSentenceSimplePresentTheTOEFLexamisgiveneverysixmonths.SimplepastTheTOEFLexamwasgivenlastmonth.SimpleFutureTheTOEFLexamthisyearwillbegivenonOctober15.PresentContinuousTheTOEFLexamisbeinggiveneveryyear.PresentperfectTheTOEFLexamhasbeengiveneveryyearsince1950.PastperfectTheTOEFLexamhadbeengivenbeforetheVietnamWaroccurred.SimpleModalTheTOEFLexamshouldbegiventoeveryForeignstudent.PastModalTheTOEFLexamshouldhavebeengiventoalltoenterUScolleges.2.ThePresentPerfectPassiveVoiceThestructureofThePresentPerfectPassiveVoiceis:
have/has+been+~edIV.ReadingaloudanddiscoveringNowgobacktopage18toreadaloudanddiscoverinthetextexamplesofThePresentPerfectPassiveVoice.…asalaptop,Ihavebeenusedinofficesandhomessincethe1970s.Sincethe1970smanynewapplicationshavebeenfoundforme.V.DiscoveringusefulstructureWeshalldogrammarexercises1,2and3onpage21.VI.ClosingdownbydoingaquizCorrectthemistakesinthesepassivevoicesentencesExample:
Thehousewasbuildin1880.(correct=Thehousewasbuiltin1880.)1.3000employeeswerelayingoff.2.Astorywillmadeup.3.Anideawasputtedfor
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