人教版高中英语必修2教案Unit 3Computers.docx

人教版高中英语必修2教案Unit 3Computers.docx

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人教版高中英语必修2教案Unit3Computers

人教版高中英语必修2教案

Unit3Computers

Thetopicofthisunitareinformationtechnology，historyandbasicknowledgeofcomputersandrobots。

ThemainthemeiscomputerswhichisconnectedwithteachingstudentsalittlemoreofthehistoryanddevelopmentofcomputersandapplicationscomputerswillbevitaltothemodernizationofChina.

Itisimportantforstudentstounderstandthatthedevelopmentofcomputershasbeenaveryrecentthingwhichhasonlybeen100yearssinceCharlesBabbagebegantomakehisfirstmachinethatwasthepredecessorofthepersonalcomputersweusetoday.Understandingthehistoryofcomputerswillhelpthestudentstoseethattherewillbemanychangesaheadinthedevelopmentofcomputersandarousestudents`interestinlearningcomputers.

Newwordsandcollocations:

calculate,universal,simplify,sum,operator,logical,technology,technological,revolution,artificial,intelligence,intelligent,solve,reality,personal,tube,total,network,web,application,finance,mobile,rocket,explore,anyhow,goal,happiness,download,virus,signal,type,coach,arise,electronic,appearance,character,mop,niece,from….on…,asaresult,so…that…,humanrace,inaway,withthehelpof,dealwith,watchover

Abilityaims:

arousethestudents`greatinterestinlearningcomputersandletthemlearntousethemintheirdailylife.

Difficultpoints:

howtodevelopstudents`readingskills,expresstheiropinionsandusepersonificationandchronologywhenwriting.

Importantpoints:

letthemlearnmoreaboutthehistoryandbasicknowledgeofcomputersanddifferentreadingskills.

Step1Leadinginthetopic

1.Showthemsomepicturesofanabacus,acalculator,ahugecomputer,alaptopandaPC.Insomegroups,discusswhattheyhaveincommon,andthenrankthemaccordingtothetimeoftheirappearance.

2.Askstudentstogivetheiropinionsandremindthemofusingthefollowingexpressions：

Ithinkthat……

Inmyopinion,……

Ibelievethat……

What`syourreason?

Whydoyouthinkso?

3.Asksomestudentstotalkaboutwhattheyknowaboutcomputers.

Achainofeventsshowingthedevelopmentofcomputers.

Acalculatingmachinein1642inFrance

→

AnAnalyticalMachine

→

A“universalmachine”in1936

→

Thesizeofalargeroom

→

Madesmallerandsmaller

→

Cleverandquicker

→

Anetworkintheearly1960s

→

Broughtintopeople`shomesin1970s

→

Manynewapplicationssincethe1970s

→→

Today

Step2.Predictingbytalkingfree

1.Askstudentstolookattheheadingandpicturetoguesswhatthepassagemightbeabout.

2.Asksomestudentstogivetheiropinionsbyansweringthequestion:

Howhavecomputerschangedourlife?

Doyouknowinwhatwayscomputersareusedtoday?

Step3.Reading

1.Lookatthepictureandtitletopredictwhatthepassagemightbeabout？

2.Readthepassagefastforthetopicsentenceofeachparagraph：

Paragraphs

Topicsentences

Para1

Ibeganasacalculatingmachinein1642inFrance。

Para2

Mymemoryimproved

Para3

Sincethe1970shavebeenfoundforme

3.Readthetextcarefullyfortheinformationtocompletethetablebelow,describingthedevelopmentofcomputers

In1642

In1936

Bythe1940s

Intheearly1960s

Sincethe1970s

Now

4.根据课文内容填空

Parts

Mainideas

Details

PartI

Thedevelopmentofcomputers

In1642,thecomputerwasbuiltasa（n）calculatingmachine.

Twohundredyearslater,thecomputerwasbuiltasa（n）analyticalmachinebyCharlesBabbage.

In1936,AlanTuringsaidthecomputercouldbeworkedasa“universalmachine”tosolveanydifficultmathematicalproblem.

Bythe1940s,thecomputerwasaslargeasaroom.

Later,thecomputerbecamesmallerandsmaller.

Sincethe1970s,thecomputerhasbeenusedinofficesandhouses.

Thecomputercanshareitsknowledgewithothersthroughthewebsites.

PartII

Theimprovementofcomputer’smemory

Thememoryofthecomputerwasstoredintubes,transistorsandverysmallchips.

Itsmemoryhasgrownalotsincethenetworkappeared.

PartIII

Newapplicationsofcomputers

Communication,financeandtrade.

Robots,mobilephonesandmedicaloperations.

Spacerockets

Providingthehumanracewithalifeofhighquality.

5.Readthetextagaintounderlinetheexpressionsandwritedownintotheirnotebookafterclassashomework:

beginas,acalculatingmachine,bebuiltas,asthattime,atechnologicalrevolution,artificial,intelligence,writeabook,make…workas,solveproblems,fromthenon,insize,both…and…,bythe1940s,goby,asaresult,changeone`sshape,so….that…,belonely,standtherebyoneself,beconnectedby,shareone`sknowledgewith…,becomeimportantin…,put…into….,aswellas,provide….with…,befilledwith…,adevotedfriend,thehumanrace

5.Listentothetextandskimthetextoncemoreandidentifythedifficultsentences.Letthemtryanalyzingthestructuresofthem.

Step4Interviewgames

Askstudentstoworkinpairs.Supposeoneisajournalistandtheotherisacomputer,thejournalistisinterviewingthecomputer.

Step5Learningpersonificationandchronology

Personificationmeanstotreatsomethingasifitwerehumanorhadhumanqualities.Itisofthemosteffectivewaysofusingwordsfiguratively.

Chronologymeanstodescribethingsinorderoftimewhichisoftenusedinrecountinganeventordescribingthelifeofsomeone.Itisaneffectivewaytomakeamassofthingsclear.

Anversion:

I,thecomputer,wasacalculatingmachinein1642inFrance.ThenIwasbuiltasanAnalyticalMachine,whichwasatechnologicalrevolution.Ibecamea“universalmachine”in1936tosolveanymathematicalproblem.IwasnotverybigatfirstthenIbecamehuge,thesizeofalargeroombeforeIwasmadesmallerandsmaller.

Ibecamecleverandquickerandwasconnectedwithothercomputersandturnedouttobepartofanetworkintheearly1960s.Iwasbroughtintopeople`s,andmanynewapplicationshavebeenfoundforme.

Step5Closingdownbyspokenpractice

Talkaboutthedevelopmentofcomputersbyansweringthequestions:

1）.Doyouhaveyourowncomputerathome?

2）.Howfamiliarwithcomputersdoyouthinkyouare?

3）.HowmanytimesdoyouaccesstheInternetnewspaperinaweek?

4）.HowmanytimesdoyouaccesstheWorldWideWebinaweek?

5）.Howmanytimesdoyousendthee-mailsinaweek?

6）.Howmanyhoursdoyouspendininternet“chat”groupinaweek?

7）.Doyouthinkthecommercialservicesonthenetarereliable?

8）.Ingeneral,howpositiveornegativeanexperienceisitforyoutoworkwithcomputers?

9）.Ingeneral,whateffectsdoyouthinkthecomputertechnologyhashadonyourstudy?

10）.Ingeneral,whateffectsdoyouthinkthecomputertechnologyhasonhumansocietiesandcultures?

Step6Homework

1.Gooverthetext,andtrytolearnalltheusefulwordsandexpressionsbyheart

2.Finishtheexercisesincomprehendingonpage19.

Artificialintelligencemeansman-madeintelligencewhile“realintelligence”istheintelligencethathumanthathumanbeingsarebornwith.Theterm“artificial”includesallthecalculationsthatacomputercando.Itisdifferentfromhumanintelligencebecauseitonlyworkswithelectricityandcanbeturnedoffwhenthemachineisunpluggedfrothewall.

Transistorsareawayofsendingandstoringinformationthatonlytakeupasmallspace.Theymeantthatcomputercouldbemadesmallerandtheyledtocomputersbecomingsmallandpersonal.

Anetworkisanumberofcomputersthatarejoinedtogethersothattheyallshowthesameprogram.Soanumberofstudentscanworkinthesameroomonthesameprogrambutatdifferentcomputers.

TheInternet（WWW）isaworldwideinformationresourcewherepeoplecandoresearch,goshoppingorsendingmessagestofriends.Whentheysendmessagestheydoitby“e-mail”or“electronicmail”.Themessagesaresentbysatellitetospecialplaceonthegroundthatcanreceivethem.Themtheyaresenttotheaddresswherethepersoncanopenthemandreadthemlikealetter.

The1970swaswhencomputersbecamesmallenoughtocomeintopeople`shomes.Thesecomputersarecalled“personalcomputers”.

Thesecondperiod:

Learningaboutimportantlanguagepoints

Knowledgeaims:

1.Getstudentstolearnandgrasptheimportantusefulnewwordsandexpressions:

calculating,calculator,PC,laptop,common,simplify,simple-minded,artificialintelligence,anyhow,totally,network,truly,race,birth,goby,dealwith,humanrace

2.Importantusefulsentencepatterns:

1）IbeganasacalculatingmachineinFrancein1642.

2）Astimewentby,Iwasmadesmallerandsmaller.

3）AndmymemorybecamesolargethatevenIcouldn`tbelieveit.

3.Abilityaims:

Getstudentstousesomeusefulnewwordsandexpressionscorrectly.

4.Emotionaims:

Stimulatestudents`interestinlearningEnglishandthespiritofcooperation.

5.Importantpoints:

Enablethemtograsptheusagesofsuchimportantnewwordsandexpressionsascommon,anyhow,incommon,inone`sopinion,dealwith,etc.

Getthemtomasterthepattern“AndmymemorybecamesolargethatevenIcouldn`tbelieveit.”

6.Difficultpoints:

Howtogetthestudentstomastertheusagesoftheimportantexpressions

Getstudentstounderstandsomedifficultandlongsentences.

Step1Revision

Checkthehomeworkexercises.

Asksomestudentstoretellthedevelopmentofcomputers.

Step2Vocabularystudy

1.Askstudentstofillintheformaccordingtotherequirement.

n.

adv.

calculate

calculator

true

truly

technological

technology

personal

personally

intelligent

intelligence

total

totally

2.Reviewthenewwordsandexpressionsinallthepartsandhavead