新课标高中英语必修2 Unit 3 Computer 全单元教案.docx

新课标高中英语必修2 Unit 3 Computer 全单元教案.docx

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新课标高中英语必修2Unit3Computer全单元教案

新课标高中英语必修2Unit3Computer全单元教案

M2Unit 3 Computer

Period1:

Warmingup

（WHOAMI?

）

Warmingup

Thissectionisanintroductiontothetopic．Itistogetthestudentsthinkingaboutthedifferentwayscomputerscanbemade．Dothispartofthelessoninpairsandasaspeakingactivity．

Warmingupbytalkingaboutcomputer

Lookatthepicturesonpage17.Whatarethey?

Whatdotheyhaveincommon?

Yes,theyarecomputers.Thenwhatisacomputer?

Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.

DrawontheblackboardadiagramtoillustratetheinfluenceofthecomputerandtheInternetovertheschooleducation．Belowisadiagramyoumayliketouse．Askstudentstolookatthediagramandconsider,”WhatchangeshavecomputersandtheInternetbroughttoschools?

Whatchangeswilltheybringtoschoolsinthefuture?

”AsktheSstoworkingroupsandtomakealistofthepossiblechangestheycanthinkof．Whenmostofthegroupshavetheirlistsready,theteachercanholdaclassdiscussion．Writedownthemajorchangesthestudentsthinkofunder/besidethediagram．Theteachercanaddoneortwochangesthatmayaffecttheirownteaching．Forexample,“ComputersandtheInternetcanhelpbusyparentscontactteachersbyemail．”Theteachercanendthetaskwithabriefsummary,orholdafurtherdiscussiontofindoutstudents'personalopinionsaboutthechanges．Forexample,askthem,“Doyoulikeallthesechanges?

Whyandwhynot?

Whatchangesdoyoulike/dislike?

”

Someinformation:

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,GigabyteandNibble

CPU–CentralProcessingUnit,Anothernameforprocessor

Data-Informationstoredonacomputer

Disk-Aplacetostoredata.

Email-Electronicmail.

GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.

Load-Getdatafromadisk

Nibble-HalfaByte

Save-Putdataonadisk

RAM–random-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,partoftheInternet

Period2-3Pre-reading&Reading

Pre-reading

ThiscanbeacontinuationoftheWarmingUp．LetthestudentsdiscussthequestionssetoutintheStudent'sBook．

1.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.

●amachineforperformingcalculationsautomatically

calculator:

anexpertatcalculation（oratoperatingcalculatingmachines）

●Acomputerisadeviceormachineformakingcalculationsorcontrollingoperationsthatareexpressibleinnumericalorlogicalterms.Computersareconstructedfromcomponentsthatperformsimplewell-definedfunctions.Thecomplexinteractionsofthesecomponentsendowcomputerswiththeabilitytoprocessinformation.Ifcorrectlyconfigured（usuallyby,programming）acomputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifacomputerconfiguredinthiswayisgive

2.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.

II.Reading

Thisisthepurposeofthereadingandsoitisimportantthatthestudentslearntouseallthecluesinthetexttohelpthemunderstandthegistofwhattheyarereading．Soencouragethemtolookatthepicturesandtheheadingandguesswhatthetextmightbeabout．Thenasktheclasstoreadthepassagesilently．Makesurethestudentshavethechronologyofthedevelopmentofcomputersintheirminds．Askthem:

1.ListeningandreadingtotherecordingofthetextWHOAMI?

Turntopage18andlistenandreadtotherecordingofthetext.Payattentiontothepauses,pronunciationandintonationofthenativereader.

2.Readingaloudandunderliningexpressions

Nowwearetoreadthetextonceagainandunderlinealltheexpressionsinthetext.Putthemdownintoyournotebookafterclassashomework.

CollocationsfromWHOAMI?

beginas…,acalculatingmachine,bebuiltas…,followinstructionsfrom…,soundsimple,atthetime,atechnologicalrevolution,writeabook,make…work,solveproblems,becomehuge,hadartificialintelligence,gobackto…,thesizeof…,goby,changesize,becomesmallandthin,getquick,standtherebyoneself,beconnectedby…,shareinformationby…,talkto…,bring…into…,dealwith…,communicatewith…,servethehumanrace

3.Reading,identifyingandsettling

Attention,please!

Itistimetoskimthetextonemoretimeandidentifythedifficultsentences.Tryanalyzingthestructuresofthedifficultsentencesanddiscussthemamongyourgroupmembers.Youmayalsoputyourquestionstomeforhelp.

Chat（online）（在线）聊天

Tochatistotalkaboutordinarythingsthatarenotveryimportant.Youcanchattoonepersonortomanypeople.PeoplealsousethiswordnowforpartsoftheInternetwherewecantalkwithmanydifferentpeopleatthesametime.Usually,youchatontheinternetinachatroomormessagingservicelikeAOL（AmericanOn-Line）InstantMessenger（AIM）,YahooMessenger,orMSNMessenger.

IV.Closingdownbydoingcomprehendingexercises

Turntopage18andinpairsdothecomprehendingexercisesNo.1and2.Readingandtransferring

Scanthetextforinformationtocompletethetablebelow,describingthedevelopmentofcomputer.

In1642

In1822

In1936

In1960s

In1970s

Answerkey:

1642:

Thecomputerbeganasacalculatingmachine．

1822:

TheAnalyticalMachinewas madebyCharlesBabbage．

1936:

AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork．

1960s:

Computershadnewtransistorsandbecamesmaller．

1960s:

Thefirstfamilyofcomputersconnectedtoeachother．

1970s:

Computerswerebroughtintopeople'shomes．

Now:

Computersconnectpeopleallovertheworldtogether

V.Explanation

1．incommon:

fororbyallofagroup共同的；共有的；共用的。

incommon常常同have连用，如：

havenothingincommon无共同之处

havelittleincommon几乎无共同之处

havesomethingincommon有一些共同之处

havealotincommon有许多共同之处

（1）Youknow,Dorothy,youandIhaveonethingincommon．

（2）WejusthadnothingincommonandIcouldn'tcomm