高中英语必修2Unit3教案

Unit3:Computers

PeriodOne

TheGeneralIdeaofThisPeriod：

ThisperiodincludesWarmingup,ReadingandComprehendingofUnit3.Itintroducesthe

historyanddevelopmentofcomputers.Fromthisperiodthestudentswilllearnmoreabout

computers.Meanwhiletheycanlearnsomereadingstrategiessuchasskimmingandscanning.

TeachingAims：

1.Trainthestudents5readingability.

2.Leamsomeusefulwordsandexpressions.

3.Learnmoreaboutcomputers.

TeachingImportantPoints：

l.Helpthestudentstounderstandthepassagebetter.

2.Leamhowtousesomeimportantwordsandphrasesinthispassage.

TeachingDifficultPoints：

l.Howtohelpthestudentsimprovetheirreadingabilityandunderstandthepassagebetter.

2.Learnhowtousesomeimportantwordsandphrasesinthispassage.

TeachingMethods：

1.Skimmingthepassagetogetthegeneralideaofthetext.

2.Scanningtogetthedetailsfromthepassage.

3.Explanationsandpracticetohelpthestudentsmastersomelanguagepoints.

4.Discussiontohelpthestudentsunderstandbetterwhatthey'velearnedandtousethe

knowledgethey'velearnedinthisperiod.

TeachingAids：

l.Ataperecorder.

2.Amultimedia.

TeachingProcedures：

Step1Warmingup

1.Greetingthestudentsasusual.

2.Introducethetopicofcomputers

Showthefivepictures(anabacus,ahugecomputer,acalculator,aPC,anotebook

computer)andgetthestudentsnametheminEnglish.Throughthistask,studentscanhavea

generalideaaboutwhattheyaregoingtolearn.Besides,studentsareexpectedtohaveadiscussion

aboutwhattheyhaveincommonwhilelookingatthem.Andtheyarerequiredtousethegiven

expressionsintheirdiscussiontoexpresstheirideas.

T：Boysandgirls,todayIamgoingtointroducesomemachinestoyou.Nowlet'sseewhether

youcannametheminEnglishcorrectly,andtalkaboutthem.Nowworktogetherwithyour

partnersandtrytofindoutwhattheyhaveincommon.

Twominuteslate,fivestudentsareaskedtotalkabouttheminclass.

Si：AnabacusisanoldcalculatingmachineusedinChinauntilnow.

S2：Ahugecomputerisbuilttosolvesomemathematicalproblems.But,inmyopinion,itis

toobig.

S3：Acalculatorisanewcalculatingmachinewhichcansolvealargenumbermathematical

problems.AndIthinkitisveryconvenienttocarryanduse,soweoftenuseit.

S4：APCisapersonalcomputer,whichcansolveallkindsofproblemsandiswidelyusedin

offices,schools,shops,athomes,etc.now.

S5：Anotebookcomputerisakindofusefulcomputerwhichcanbetakenconvenientlylikea

notebook.ButIthinkitistooexpensive.

T：Quitegood.ltseemsthatyouareallquitefamiliarwiththesemachines.Butcanyoutell

whattheyhaveincommon?Anyvolunteers?

Se：Letmetry.Ithinktheyallcalculatesomething.Theycandealwithsomemathsproblems.

S7：Ibelievethattheyareourgoodfriends.Withtheirhelpwecanfinishourworkquickly.

Sg：The21thcenturyisthecenturyofinformationtechnology.Asmiddleschoolstudents,we

shouldtrytolearnhowtousecomputers.

T：Well,youropinionsareallright.Indeed，thesemachinesallcancalculate

something.What\more,fromtheabacustothenotebookcomputer,thereisalongway.But

nowcomputershavealreadychangedourlivesgreatly.Butdoyouknowmoreabout

computersandcanyousaysomethingabouthowcomputershavechangedourlives.

Step2Pre-reading

Showthequestionsonthescreen.

T：Now,pleasehaveadiscussionfirst,andthenI'llasksomestudentstoreportyourwork.

Afterafewminutes.

T：Now,whowouldliketoanswerthefirstquestion?Volunteer!

S9：rilhaveatry.Iknowthatcomputershavedevelopedfromlargemachines.Theyhavebeen

madesmallerandsmaller,butworkfasterandfaster.!reallycan'timaginewhattheywillbe

likeandwhethertheycantaketheplaceofhumanbeingsinthefuture.

T：Yes,thisisreallyabigproblem.!thinkyouareallinterestedincomputers,youmaygoon

studyingcomputers,andperhapsonedayyouwilldesignyourowncomputersandbecome

themastersofcomputers.OK!Nextquestion!

Sio：Ithinkcomputershavechangedourlivesgreatly.Weusecomputerswidelyinourstudy,

inourwork.YouareusingthecomputertoteachusEnglish,aren'tyou?

Su：Inmyopinion,inthemodernsociety,usingthecomputersmeansgraspingatoolof

controllingtheworld.Wemaycommunicatewitheachotherfromaverylongdistance.Inshort,we

cannotlivefreelywithoutthem.

T：Iagreewithyou.Thecomputersarebecomingmoreandmoreimportantinourlives.But

learningmoreaboutcomputersisalsoimportant,isn'tit?OK,let'scometothereading

passage“WhoamI”.

Step3Reading

Taskl.Skimthepassageforthegeneralidea.

T：Boysandgirls,youwillbegiventwominutestoskimthepassageandtrytofindoutwho

"I"amandgetthegeneralideaofthispassage.

Aftertwominutes.

T：Timeisup.Whowouldliketotelluswho"I"amandgivethegeneralideaofthetextto

theclass?Vblunteer!

S12：Ofcourse,"I"amthecomputer.Thepassageismainlyaboutthehistoryand

developmentofcomputers.

S13：Thepassageisalsoabouttherelationshipofcomputersandhumans.

Task2.Scanforthedetails.

T：Boysandgirls,youwillbegiventwomoreminutestoscanthepassageandtrytofindout

theanswerstothefollowingquestions.Let9sseewhocanfindouttheanswersmostquickly

andcorrectly.

1.Wherewereyouin1642?

2.Whathappenedtoyouin1822?

3.Whatwereyoucalledin1936?

4.Whatdidyougetinthe1960s?

5.Whathappenedtoyouinthe1970s?

T：Haveyoufinished?

Su：Ihave.IwasinFranceasacalculatingmachinein1642.

In1822,IwasbuiltasanAnalyticalMachinebyCharlesBabbage.

Iwascalled“auniversalmachinein1936,asIcouldsolveanymathematicalproblem.

Inthe1960s,Iwasgivenafamilyconnectedbyanetwork,sothatIcouldshareinformation

withothersandwecouldtalktoeachother.

Inthe1970s,Iwasbroughtintopeople'shomes.

T：Youaresoquick-mindedthatinsuchashorttimeyoucouldfindoutalltheanswerstothe

questions.Yourmindreallyworkslikeacomputer!

Step4Comprehending

Task3.Fillinthetimelinetorememberthefacts.

T：Butcanyoumemorizefactslikeacomputer?!amafraidyoucannot.Butlet'stryto

rememberthefactsinthepassagebyfilinginthetimelineonPage19,which,Iamsure,willhelp

yourememberthefactseasily.

Suggestedanswers：

Timeline

1642：Thecomputerbeganasacalculatingmachine.

1822：TheAnalyticalMachinewasbuiltbyCharlesBabbage.

1936：AlanTuringwroteabooktodescribehowcomputerscouldbemade.

1960s：Computershadnewtransistorsandbecamesmaller.

1960s：Thefirstfamilyofcomputersconnectedtoeachother.

1970s：Computerswerebroughtintopeople'shomes.

Now：Computersconnectpeopleallovertheworldtogether.

T：Haveyoufinished?Ifso,pleasecheckyouranswersyourself.Umsureallofyouhavegot

themright.Nowyoucanretellthehistoryofcomputerseasilywiththehelpofthetimeline,can't

you?Pleasehaveatry,boysandgirls!

Step5Homework

1.Recitethekeysentences.

2.PrepareforLearningAboutLanguage.

3.Trytoretellthetextusingabout100words.

教学反思：

在尽量教好本学期教学内容的同时，我还给学生补充了很多课外知识，如：中国的名胜古迹、

中西方文化背景差异等，这一切不仅扩大了学生的知识面，而且提高了学生的学习积极性。

2013/11/22

Unit3:Computers

PeriodTwoLearningaboutLanguage

TheGeneralIdeaofThisPeriod：

Thisperiodincludesrevisionofthetext、learningaboutlanguage.Fromthisperiodthe

studentswilllearnhowtousesomeofthekeywordsandexpressionsinthetextanddosome

exercisesforconsolidation,andlearnhowtousethePresentPerfectPassiveVoice.

TeachingAims：

1.Helpthestudentstolearntousesomeusefulwordsandexpressions.

2.Enablethestudentstolearnhowtousethepresentperfectpassivevoice.

TeachingImportantPoint：

Theuseofthepresentperfectpassivevoice.

TeachingDifficultPoints：

HowtomastertheusagesofsomeimportantwordsandphrasesandthePresentPerfect

PassiveVoice.

TeachingMethods：

1.Task-basedlearning.

2.Cooperativelearning.

3.Explanationandpractice.

TeachingAids：

l.Ataperecorder.

2.Amultimedia.

TeachingProcedures：

Step1Revision

T：Boysandgirls,inlastperiodwelearnedsomethingaboutthehistoryanddevelopmentof

computers.Nowwhowouldliketoretellthetextwiththehelpofthesefigures?

Si：Letmetry.In1642,acalculatingmachinewasusedinFrance.Thenin1922,the

AnalyticalMachinewasmadebyCharlesBabbage.ltcouldfollowinstructionsfromcardswith

holes.In1936,AlanTuring,therealfatherofcomputers,wroteabooktodescribehowcomputers

couldbemadetoworkandbuilta“universalmachine“tosolveanymathematical

problem.Later,peoplediscoveredthecomputerhad^artificialintelligence^.Inthe1960s,the

computergothisnewtransistors.Itssizewastotallychangesatthattime.Andintheearly1960s,

thefirstfamilyofcomputerswereconnectedtoeachother.In1970s,computershavebroughtinto

people'shomes.Nowcomputershavebeenusedbybillionsofpeopletodealwithinformationand

communicatewitheachotheraroundtheworldbytheInternet.

T：Congratulations!You9vedoneverywell.Nowtrytodothesametoyourpartners,OK!

Step2WordsandExpressions

Task1

T：PleaseturntoPage19andfinishDiscoveringUsefulWordsandExpressions.Atfirst,look

atEx.1.Fromthereadingpassage,findthewordsandexpressionswiththefollowing

meanings.Now,tenstudentswillbeaskedtogivethewords.Whocan?Volunteers!

Checktheanswerstogether.

Task2.

T：Welldone.NowpleaselookatEx2.andcompletethepassagewithsomeofthewords

above.Payattentiontotheuseandtheformsofthosewords.

Thepossibleanswers：

networksothatwentbytotallytrulysimple-mindedAnywaydealwith

Task3

T：PleasefinishEx.3.LookatthesentencesonPage20.Ticktherightword.Thensomeofyou

willbeaskedtoreadthesentencesonebyone.

Thepossibleanswers：

l.LifetotallychangedwhenIwenttouniversity.

2.1wasamazedtofindthatIwonthecompetitiontodesignanewcomputer.

3.Thecompetitionwassoexcitingthatwecheeredallevening.

4.1wassoexcitedatthethoughtofmeetingYangLiweithatIcouldnotsleep.

5.RobotscanbeboughtsocheaplythatIgaveonetoeachofmyfriends.

6.Itwassounluckythatyoulostyourwatchattheconcert.

Task4

T：PleaseturntoPage56andlet'sfinishUsingWordsandExpressions.Firstlookat

Ex.1.Readthroughthewordsintheright-handboxbelow.Usesomeofthemtonameeachpartof

acomputerintheleft-handbox.Wehaveknownaboutcomputer.Butwhocangiveustheexact

names?

Thepossibleanswers：

1.floppydisc2.harddisc3.scanner4.modem5.CD-ROM6.monitor7.keyboard

8.printer

Task5

T：NowpleaselookatEx.2.Completethesentenceswithsomeofthewordsintheright-hand

boxabove.Youcanuseeachwordonlyonce.Firstdotheexerciseindividually,andthencheck

youranswerswithyourpartners.Andlastsevenstudentswillbeaskedtoreporttheiranswersto

theclass.

Thepossibleanswers：

l.Aprinterisamachineforprintingtextorpicturesontopaper,especiallyonceconnectedto

acomputer.

2.ACD-ROMordiskisthemaindevicethatacomputerusestostoreinformation.

3.Amonitorisusedtoseeyourdataonacomputer.

4.Akeyboardisusedtoputdataintoacomputer.

5.ACPUisoftenusedtoconnectcomputerstoeachotherthroughphonelines.

6.Datacanalsobestoredinafloppydisc,whichissmallandcanbecarriedeasily.

7.Aharddiscisadiscthatcontainscomputerdata.ltcanstorealargeamountofdata.

Step3Grammar一ThePresentPerfect

PassiveVoice

T：Boysandgirls，nowpleasepayattentiontothefollowingsentencesinthetext：

l.Astheyearshavegoneby,Ihavebeenmadesmallerandsmaller.

2.Sincethen,myfamilyandIhavebeenusedbybillionsofpeopletodealwithinformation

andcommunicatewitheachotheraroundtheworldbytheInternet.

3.1havetrulybeenbuilttoservethehumanracesincemybirth.

T：Whatverbtenseisusedinthesesentences?Andwhatverbvoiceisusedinthesesentences?

Yes,thepresentperfectpassivevoiceisusedinthesesentences.

Canyoutellusthestructureofthepresentperfectpassivevoice?

Quiteright.Thestructureofthepresentperfectpassivevoiceis“subject+have/hasbeen

done+object”.Thefunctionofpresentperfectpassivevoiceisindicatingverbs5thepresent

perfectandthepassivevoice.OK,let'spractisethepresentperfectpassivevoice.

Task1

T：PleaseturntoPage2O.Let'sfinishDiscoveringusefulstructures.

Atfirst,lookatEx.2.Accordingtoexamples,changethefollowingsentencesintothepresent

perfectpassivevoice.Puttheverbsintothecorrectform.

Suggestedanswers：

l.Anewpersonalcomputerhasbeenbought.

2.Manyproblemshavebeenfoundwithournewcomputer.

3.APChasbeenbuiltthewaywewanted.

4.OurcomputerhasjustjoinedtotheInternet.

5.Thecomputerhasbeenusedeverydaysinceweboughtit.

6.Alotofe-mailshavebeenwrittenonthecomputerinthelastyear.

Task2

T：Class,let'splayagamecalled“Whathasbeendecided”.Now,getintogroupsoffour.Ybur

taskistodecidewhatthingshavebeendecidedfortheclass.Taketurnstomaketheideasasinteresting

andlivelyasyoulike.YoumayfinishthemaccordingtoEXAMPLESonPage21,(orfinishEx.3after

class.)Thencollecttheonesyoualllikebestandbepreparedtotellthemtotheclass.

Suggestedanswers：

Si：Ithasbeendecidedthatthosewhoknowofthecomputerwillbeaskedtosaysomething

inclass.

S2：Ithasbeendecidedthatthosewhodidn'tcleantheblackboardwillbeaskedtocomeinto

officeafterschool.

Task3

T：Now,pleaseturntoPage57.Finishusingstructures.First,lookatEx.landchangethe

followingsentencesaccordingtothemodel,andpayattentiontothepassivevoiceform.Firstdo

theexerciseindividually,andthencheckyouranswerswithyourpartners.Afterthatwe'llcheck

theanswersinclass.

Step4Homework

T：OK,it'salmosttimeforabreak.NowlookatEx.2onPage57.Translatethefollowingsentences

intoEnglishafterclass.Thewordsandexpressionsinbracketsmayhelpyou.

2013/11/25

Unit3:Computers

PeriodThree-ExtensiveReading

TheGeneralIdeaofThisPeriod：

Thisperiodincludesrevisionofthetext,ReadingandspeakingonPage22、Readingtaskon

Page58.1nthisperiodthestudentswillbeinvolvedinaspeakingactivityaboutdesigningan

androidafterreadingthestoryofAndy,andlearnsomethingabouttheperformancesofasporting

robotofthe22ndcentury,HuaFeiin78thOlympicsand79thOlympics,sothatthestudentswill

notonlyimprovetheirreadingandspeaking,butalsotheircreativethinking.

TeachingAims：

l.Helpthestudentstolearnaboutthedifferentwaysofdesigningtherobotsandgivetheir

opinionstotheclass.

2.Enablethestudentstodiscusstodesigntheirownrobots.

Talkaboutthedifferentwaysofdesigningtherobots.

TeachingImportantandDifficultPoints：

Howtodesigntheirownrobotsandreporttheirdesigningtotheclass.

TeachingMethods：

1.Task-basedlearning.

2.Cooperativelearning.

TeachingAids：

l.Ataperecorder.

2.Amultimedia.

TeachingProcedures：

Step1Greetings

Step2Reading(1)

We'velearnedalotaboutcomputers,butcanyouimaginethatcomputerscouldbeputinto

androidsorrobots.Thinkofthefunyoucouldhave!Nowlet'sfirstreadthepassageaboutarobot

calledAndy一whatitlookslikeandwhatitcandoonPage22,andthenwe'Hhaveadesigning

competitiontoseewhowilldesignthebestrobots.

Thestudentsreadthepassageforseveralminutes.

T：Afewsimplequestionsforyou.WhatdoesAndylooklike?

Whatcanitdo?

S2：Andylookslikeahuman.ltisdesignedtoplayfootballgamesandcanmoveandthink

likeahuman.Andyisreallysmart.

T：Iagreewithyou.Areyoueagertodesignyoursmartrobots?Nowinsmallgroupsdiscuss

howtodesignyourownandroids,drawapictureofyourandroidsandwritedownyour

design.Youmayrefertothefollowingquestions：

1.Whatwouldyoulikeittolooklike?

2.Whataresomeofthethingsyouwouldlikeittodo?

3.Doyouwantittobelikeamanorawomanorneither?

4.Howmuchwoulditcost?

T：Anddon'tforgettousethefollowingexpressionsinyourdiscussion.

Ithinkthat

Inmyopinion...

Whatisyourreason?

Ihavedecidedthat...

Afterseveralminutes.

T：Now,Filcheckyourwork.Onefromeachgroupwillshowyourpictureoftheandroidyou

havedesignedandtelltheclassyourdesign.Andwe'llseewhichgrouphasdesignedthebest

android.Whowouldliketotryfirst?

S3：Lookhere.Thisisthepictureoftherobotwe'vedesigned.Whatdoesitlooklike?Yes,it

lookslikeadog.Wealllikedogsverymuch.Everymorningitwillwakeusupsothatwewillnot

belateforschool.Thenitwillcompanyustoschoolandcarryourheavybags.Youknowhow

heavyourbagsare!Intheevening,afterawholeday'shardwork,itwillplaybeautifulmusicto

helpusrelax.Maybeitwillcostatleast2000yuan,butwedon'tthinkitistooexpensivetohave

suchagoodfriend.

S4：WelLwe'dliketodesignourrobotinthisway.Wewouldlikeittolooklikethefamous

footballerBeckhamwhoservesasastrikeronthefootballteam.lthasthemostadvanced

program,soitcanmoveandthinklikeBeckham,andofcoursecanshootgoodgoalslikehim.We

wouldlikeittoenterthenextElectronicWorldCup,andwearesurethatitwillwinthecup!

T：Yourdesignsareveryunusualandsmart.!reallywanttogoonappreciatingyourdesigns，

buttimeislimited.Willyouputupyourpicturesoftherobotsyouhavedesignedwithinstructions

onthebackwall,andthendecidewhichgrouphasdesignedthebestandroidsaftercomparison?

Step3Reading(2)

Class,let'scometotheReadingTaskonPage58.Firstreadthepassagequicklyandthenfill

inthechartofExercise1andkeeparecordofhisperformancesofthesportingrobotofthe22nd

century,HuaFeiin78thOlympicsand79thOlympics.Afterdoingitindividually,pleasecheck

youranswerswithyourpartners,andthenwewillchecktheanswersinclass.

Suggestedanswers

RECORDCARDHUAFEI

AbilityHighflyingexercises

Performancein78thOlympicsWonderfulturns,dives,circlesanddances

PrizewonSilvermedal

Beganverywellbutfailedthroughonfaultof

Performancein79thOlympics

hisown

ReasonforfailureParachutefailedtoopen

TreatmentTwonewlegsandanewhead

Step4Homework

T：It'salmosttimeforabreak.Nowhomeworkforyoutoday.

1.Comparethedesignsoftheandroidsofeachgroupandtrytodecidewhichoneisthebest.

2.SupposeyouhavebeenluckyenoughtobeallowedtointerviewHuaFeiinhospitalforyour

schoolpaper.Workoutsomequestionstogetherwithyourpartner,andthenintervieweachother.

2013/11/27

Unit3:Computers

Period5Writing

TheGeneralIdeaofThisPeriod：

ThisperiodincludesspeakingandwritingonPage22andwritingonPage23.Thepurposeis

toencouragetheSstothinkandtalkcreativelyaboutcomputersandandroids,expresstheirown

opinionsusingwordsandexpressionsconcerningcomputersandandroids,andorganizetheir

ideasintoacomposition.

TeachingAims：

1.Enablethestudentstolearnhowtowriteareportabouttheirchoice.

2.Enablethestudentstolearnthewritingwayofexpressingideasandgivingreasonsto

supporttheideas.

TeachingImportantandDifficultPoint：

Howtomakeadecisionaboutwhichkindofcomputertobuyandexplainwhy.

TeachingMethods：

1.Task-basedlearning.

2.Cooperativelearning.

TeachingAids：

Aprojectorandmultimedia.

TeachingProcedures：

Step1Speakingandwriting(Page22)

T：Class,supposeyouandyourpartnerhavebeenaskedtohelpchoosecomputersforyour

school.Youhavelookedatseveralcomputers.Talkaboutthespecialthingseachcomputer

has.Makeadecisionaboutwhichkindofcomputertobuyandexplainwhy.Andthenyouare

goingtowriteareportaboutyourchoiceThereisalistofthingsyourcomputercouldhave.

AfastPCthemonitorissmaller

Improveddiscstorageusedrecycledmaterials

Internetaflatscreen

Studentstalkaboutthespecialthingseachcomputercando.

T：Somuchforthetalking.Andnowyouwillbegivenfiveminutestowriteareportabout

yourchoice.Afterthatsomeofyouwillbeaskedtopresentyourreporttotheclass.Inyourwriting

trytousethepresentperfectpassiveinyourreport.Youmaybeginyourreportlikethis：

Welookedatmanydifferentcomputers.TheonewehavechosenisthePEPpersonal

computer.Oneofthemainreasonsisthatitissuitableforschools.Wefoundoutthat...

Fiveminuteslater,severalstudentsbegintopresenttheirreportstotheclass,andtheteacher

willshowtwoorthreereportsusingtheprojectortofindoutandcorrectthepossiblemistakes

withtheclass.

Possibleversion

Welookedatmanydifferentcomputers.TheonewehavechosenisthePEPpersonal

computer.Oneofthemainreasonsis