新课标必修2Unit3unit3computers教案.docx

新课标必修2Unit3unit3computers教案.docx

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新课标必修2Unit3unit3computers教案

Unit3Computers

一、拓展性教学活动

Step1DrawontheblackboardadiagramtoillustratetheinfluenceofthecomputerandtheInternetovertheschooleducatio．nBelowisadiagramyoumayliketouse．

Step2Askstudentstolookatthediagramandconsider,”WhatchangeshavecomputersandtheInternetbroughttoschools?

Whatchangeswilltheybringtoschoolsinthefuture?

”

Step3Askthemtoworkingroupsandtomakealistofthepossiblechangestheycanthinkof．

Step4Whenmostofthegroupshavetheirlistsready,theteachercanholdaclassdiscussion．Writedownthemajorchangesthestudentsthinkofunder/besidethediagram．Theteachercanaddoneortwochangesthatmayaffecttheirownteaching．Forexample,“ComputersandtheInternetcanhelpbusyparentscontactteachersbyemai．l”

Step5Theteachercanendthetaskwithabriefsummary,orholdafurtherdiscussiontofindoutstudents'personalopinionsaboutthechang．esForexample,askthem,“Doyoulikeallthesechanges?

WhyandwhynoWt?

hatchangesdoyoulike/dislike?

”

二、自我评价建议

（一）非测试性评价

1．TowhatextentarethecomputerandInternetbecomingpartofyourlife?

Iusethecomputerand/orInternetto:

□typemyhomework,□drawpictures.□playgames□communicatewithmyfriends．

□giberrelatedinformationformylessons.□buythethingsIlike,e.g.booksand

clothes,□listentomusi,c□watchmovie,s

2,WhatelsedoyouthinkthecomputerandInternetwillhelpyoutodo?

3．Whichpar（ts）ofthecomputerdoyouthinknee（ds）moreimprovement?

Why?

YoucanuseExercise1intheWorkbook（p56）asreferenceforthepartsofthecomputer．

（二）测试性评价

Explainhowthecomputertechnologyhasbeendevelopingandcompletetheflowchartbelow．Thengiveabrieforalpresentationonthedevelopmentofcomputertechnologywiththehelpofthechart．Whenyou'repreparingit,youcanrefertothereadingpassageonPage18oftheStudent'sBo．okYouroralpresentationwillbelessthanthreeminutes．Thenwriteashortpassagebasedonyouroralpresentation.

三、补充注释

1．incommon:

fororbyallofagroup共同的；共有的；共用的。

thelandownedincommonbytheresidents居民共有的土地。

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

以下是从英国国家语料库中精选出来的几个例句：

（1）Youknow,Dorothy,youandIhaveonethingincommon．

（2）WejusthadnothingincommonandIcouldn'tcommunicatewithhisdullbusinessfriends．

（3）Isuddenlyfeltwehadalotincommon．

2．simple-minded:

showingverylittleintelligence头脑简单的；笨的。

Richardissmartbuthehasalotofsimple-mindedfriends.理查德很聪明，可是他有许多头脑简单的朋友。

simple-minded是一个复合形容词，与它结构相同的复合形容词还有：

absent-minded心不在焉的

open-minded虚心的，没有偏见的

narrow-minded心胸狭窄的

single-minded一心一意的

strong-minded意志坚强的

weak-minded低能的，愚蠢的

3．makeadecision:

makeupone'smind作出决定。

与makeadecision意思相近的词组有：

arriveat/cometo/reachadecision

与make连用的常用词组有：

makeanattempt,makeaneffort,makeanoffer,

makeasuggestion,makeaphonecall,makeamistake,makeprogress。

4.inaway:

toacertainextent在某种程度上。

与inaway同义的词组有inoneway和insomeways

容易与之混淆的词组是intheway意为造成阻碍”请比较：

Inaway,Ilikethisnewtextbookverymuch.从某种程度上说，我很喜欢这本新教材。

rmafraidyourbikeisintheway.看来你的自行车挡着道了。

5.afterall

1）inspiteofwhathasbeensaid,doneorexpected^竟；终究；归根结底。

Soyou'vecomeafterall!

你终究还是来了！

Afterall,whatdoesitmatter?

归根结底，那又有什么关系呢？

2）itshouldberemembered别忘了。

Sheshouldhaveofferedtopay—she'samillionaire,afterall.她应该主动提出付款一一别忘了，她是个百万富翁。

6.watchover:

takecareof照料；照管。

CouldyouwatchovermydogwhileIamonholiday?

我度假的时候，你能帮我照料我的狗吗？

Yougoswimming,please,rilwatchovertheclotheshere请你去游泳吧，我来照管这些衣服。

7．wander（v.）:

tomovearoundinanareaorgofromplacetoplacewithoutanyspecialpurpose;roam游荡；闲逛。

Hewaswanderingaimlesslyupanddowntheroad他在路上无目的地来回溜达。

由于拼写相近，wander容易与wonder混淆。

教师可以提醒学生注意区分，并同学生一起归纳整理wander和wonder各自的用法。

四、TeachingguidefortheSB

WARMINGUP

Thissectionisanintroductiontothetopic．ItistogetthestudentsthinkingaboutthedifferentwayscomputerscanbemadeDothispartofthelessoninpairsandasaspeakingactivity．

PRE-READING

ThiscanbeacontinuationoftheWarmingUp．LetthestudentsdiscussthequestionssetoutintheStudent'sBook

READING

Thisisashorthistoryofthedevelopmentofcomputersoverthelast100yearsItintroducesalotofnewandtechnicalwords,whichareonlyusedforcomputer（ssuchas“artificialintelligence“netwo”rk）o”r.

1Teachingnewwordsandstructures

2Understandingideas

Thisisthepurposeofthereadingandsoitisimportantthatthestudentslearntouseallthecluesinthetexttohelpthemunderstandthegistofwhattheyarereading.Soencouragethemtolookatthepicturesandtheheadingandguesswhatthetextmightbeabout.ThenasktheclasstoreadthepassagesilentlyMakesurethestudentshavethechronologyofthedevelopmentofcomputersintheirminds.Askthem:

1Whowasthefirstpersontodevisetheearliestcomputer?

2Whatdidhemakeandwhatdiditdo?

3Whowasthenextimportantpersontodesigncomputers?

COMPREHENDING

1Threereasonableanswersareacceptable,eachofwhichneedsareasonwithit.Thethreepossibleanswersaregivenbelow:

Itisacomputerbecauseitdescribes:

•itselfastheanalyticalmachinedesigntebyCharlesBabbage（whichwasthefirstdesignofacomputer）.“Thenin1822IwasbuiltasanAnalyticalMachinebyCharlesBabbage”

•AlanTuringasitsrealfathe（（andhedesignedthefirstrealcomputer.“My

realfatherwasAlanTuring....”

•havingartificialintelligenee（whichonlycomputershave）.Peoplehave

naturalintelligenee.“However,peoplethoughtIwassimple-mindeduntilthey

discoveredIhad‘artificialintelligenee'.”

2Answerkey:

1642:

Thecomputerbeganasacalculatingmachine

1822:

TheAnalyticalMachinewasmadebyCharlesBabbage

1936:

AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork.

1960s:

Computershadnewtransistorsandbecamesmaller

1960s:

Thefirstfamilyofcomputersconnectedtoeachother

1970s:

Computerswerebroughtintopeople'shomes

Now:

Computersconnectpeopleallovertheworldtogether

LEARNINGABOUTLANGUAGE

Discoveringusefulwordsandexpressions

AnswerkeyforExercise1:

1totally2revolution3artificialintelligenee4birth5

simple-minded6goby7dealwith8network9truly10anyway

AnswerkeyforExercise2:

revolution;network;wentby;totally;truly;simple-minded;Anyway;dealwith

AnswerkeyforExercise3:

1totally2amazed3exciting4excited5cheaply6uniucky

Discoveringusefulstructures

AnswerkeyforExercise1:

1...myfamilyandIhavebeenusedbybillionsofpeopletodealwithinformation....

2Ihavetrulybeenbuilttoservethehumanrace....

AnswerkeyforExercise2:

1Anewpersonalcomputerhasbeenboughtbyus

2Manyproblemshavebeenfoundwithournewcomputer

3APChasbeenbuiltthewaywewanted

4OurcomputerhasjustbeenjoinedtotheInternet

5Thecomputerhasbeenusedeverydaybyussinceweboughtit

6Alotofe-mailshavebeenwrittenonthecomputerinthepastyear

USINGLANGUAGE

Listeningandwriting

Thepurposeofthisexerciseistoencouragestudentstolistenandthenusewhattheyhaveheardtohelpthemfillinachartaboutcomputers.Itisanimportantexercisebecauseitlinksskillstogetherandusesthemtoproduceausefulpieceofwriting.

MakesurethestudentslookatthechartbeforetheylistentothetapeThisistosharpentheirattentionandlistenfortheanswersThiswillalsohelpthemgetthegistofthetext.Whenfillinginthechart,thestudentswillhavetousetheirownexperieneeaswellasinformationfromthelisteningtext

LISTENINGTEXT

LIMING:

WhatareyoudoingDave?

DAVE:

rmreadingaboutinformationtechnology.

LM:

Youmeanthingslikecomputers?

Inmyopinionthey'resoboringto

readaboutThey'reonlygoodtouse

D:

Butthey'rejustonekindofIT.

LM:

Really?

SowhatelseispartofIT?

D:

We'vehadITforalongtime.Books,radiosandTVsarealsokindsof

IT.

LM:

Oh.IneverthoughtofthatbeforeBooksareawonderfulwayforusto

getinformation.

D:

Yeah,Ibelievethattoo.Theyarecheapandeasytotakewithyoubut

sometimestheinformationisoutofdate

LM:

Iagree.Theworldischangingsofast.Butinmyopinionlisteningto

sportsontheradioisbetterthananythingelse.SometimesIalsolistentoEnglishprogrammesontheradio.Buttheyspeaksofastandsometimesit'sdifficulttounderstandeverything

D:

Yes.IalsolistentoEnglishontheradiobutit'seasiertofollowonTV

becauseyoucanalsoseewhatisgoingonSometimesitismoreinterestingtowatchsportsonTVthanjustlistentothemontheradio

LM:

Idisagreebecauseyougetsuchalotofinformationonthetechnical

aspectsofagameontheradio.Youdon'tgetthatonTV.ButIstillthinkthatthecomputeristhebestkindofIT.Youcanwatchafilmonit,writetofriends,getinformation,andfindoutwhatisgoingonintheworld.

D:

Iknow,butitisalsothemostexpensiveanditistoobigtocarrywith

youeverywhere.AlsotheInternethasnobodytocheckwhetherthatinformationyoufindthereiscorrect.Soyouhavetobecareful

LM:

Well,IsupposeallkindsofIThavebothdisadvantagesand

advantages

Suggestedanswers:

TypeofIT

Advantages

Disadvantages

TV

Youcanbothlistenandwatch

Youcannotwritetofriends.

Web

Youcanfindinformation.

Itisveryexpensive.

Radio

YoucanlistentoEnglish.