人教版高中英语必修二教案unit3 Period 4 Learning about languageWord格式.docx

人教版高中英语必修二教案unit3 Period 4 Learning about languageWord格式.docx

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1.AnoldcalculatingmachineusedinChinauntilnow.（）

2.Itisbuilttosolvesomemathematicalproblems.Butitistoobig.（）

3.Itisanewcalculatingmachinewhichcansolvealargenumberofmathematicalproblems.（）

4.Itisapersonalcomputerwhichcansolveallkindsofproblemsandisusedwidelynow.（）

Step2Pre-reading

LookatthepicturesonP17andputtheminanorderaccordingtothetime

（）analyticalmachine（）laptop（）calculatingmachine

（）robot（）PC（）universalmachine

Step3Skimming

Themainideaofthepassage:

Thisisashort________ofthe__________ofcomputers.

Findoutthetopicsentencesofeachparagraph

1______________________________________________________

2____________________________________________________________

3__________________________________________________________

Step4Scanning

TrueorFalse?

In1642Ibeganasacalculatingmachineandcouldsolveanymathematicalproblem.（）

MyrealfatherwasCharlesBabbage,whowroteabookandbuildmein1936.（）

AfterIgotmynewtransistorsinthe1960s,Ibecamesmallerbutclevererandquicker.（）

Iwasbroughtintopeople’shomesinthe1970s.（）

5.SincemybirthIhavebeenbuilttotaketheplaceofhumanrace.（）

Step5Carefulreading

1642:

_________________________________________________________________________

Nearlytwohundredyearsafter1642:

______________________________________________

1936:

________________________________________________________________________

1940s:

________________________________________________________________________

1960s:

1970s:

________________________________________________________________________

Now:

Step6Discussion

Whathavepeopledonesincecomputerswereimproved?

listofusesforcomputers

whatpeopledidbeforecomputers

writingletters,sendingtelegrams,postcards

writingbyhandortypewrite

goingtothecinema,watchingTV

Listeningtoradioorrecorder

lookingupinreferencebooks/magazines,goingtolibrary

writingeverythingdownandputintofiles

shoppinginashopormarket

Summary:

Accordingtotheinformatinabove,pleasegiveabriefintroductionofusesofcomputers

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

A

TheInternetisbecomingimportantinourlife.Howmuchdoyouknowaboutit?

WhatistheInternet?

TheInternetisalarge,worldwidecollectionofcomputernetworks.Anetworkissmallgroupofcomputersputtogether.TheInternetismanydifferentnetworksfromallovertheworld.ThesenetworksarecalledtheInternet.OnceyouhavelearnedtousetheInternet,youcandoalotofinterestingthingsontheWorldWideWeb.

WhatistheWorldWideWeb?

TheWorldWideWebhasbeenthemostpopulardevelopmentoftheInternet.TheWebislikeabigelectronicbookwithmillionsofpages.Thesepagesarecalledhomepages（主页）.

Youcanfindinformationaboutalmostanythingintheworldonthesepages.Forexample,youcanusetheInternetinsteadofalibrarytofindinformationforyourhomework.Youcanalsofindinformationaboutyourfavoritesportorfilmstar,talktoyourfriendsorevendosomeshoppingonthepages.Mostpageshavewords,picturesandevensoundormusic.

Whatise-mail?

Electronicmail（e-mail）isawayofsendingmessagestootherpeople.It’smuchquickerandcheaperthansendingaletter.

Ifyouwanttousee-mail,youmusthaveane-mailaddress.Thisaddressmusthavelettersanddotsandan“@”（meaning“at”）.Thisiswhatanaddresslookslike:

Emily@star.net.

Writeamessage,typeintheperson’se-mailaddress,thensendthemessageacrosstheInternet.Peopledon’tneedtousestamps,envelopesorgotothepostofficesincetheinventionoftheInternet.

Quick,easyandinteresting—that’stheInternet!

（）1.WhatistheInternet?

A.It’sabigcomputer.B.It’sasmallgroupofcomputers.

C.It’slotsofcomputernetworks.D.It’stheWorldWideWeb

（）2.Whatdoes“talktoyourfriendsonthepages”mean?

Itmeans_____

A．youcantalktoyourfriendsfacetoface

B．youcantypeyourwordsinthecomputerandthensendthemtoyourfriendsacrosstheInternet

C.youtalktoyourfriendsthroughthesamecomputer

D.yougotoyourfriends’housestotalktothem

（）3.Whydopeopleliketousee-mailtosendmessagetotheirfriendsandfamilies?

Because_______

A.theydon’thavetopayanymoneyB.it’sfasterandcheaper

C.theydon’tneedtohavestamps,envelopesoraddressD.sendinge-mailisinteresting

（）4.Whatdoesthe“e”meanine-mail?

Itmeans______

A.easyB.electricalC.electronicD.enjoyable

B

HowtoprotectchildrenWebfansfromunsuitablematerialon-linewhileencouragingthemtousetheInternethaslongbeendiscussedinUS.

ForsomeparentstheInternetcanseemlikeajungle,filledwithdangerfortheirchildren.Butjunglescontainwondersaswellashazardsand,withgoodguides,someeducationandafewprecautions（预防措施）thewildsoftheInternetcanbesafelynavigated（航行）."

Kidshavetobeon-line.Ifwetellourkidstheycan'

thaveaccess（进入）totheInternetwe'

recuttingthemofffromtheirfuture,"

saidanexpert.

Mostkidshavestartedtolearntousesearchengines.ManyofthemaregreatforfindingtonsofinterestingInternetsites,andtheycanalsolocateplaceswhereyoumightnotwantyourkidstogo.Therearesearchenginesdesignedjustforkids.Acertainsoftwarecontainsonlysitesthathavebeenselectedassafe.Butthemostpopularthatwastolimitaccesswouldbetousewhatisknownasa"

contentscreener（过滤）"

.Butthiscan'

tbewhollyreliable,andthebestthingparentscandoistotalktotheirkidsandletthemknowwhat'

sOKornotOKtoseeordoontheInternet.Anotherwayisthatmumordadisnearbywhenthechildissurfing（浏览）theInternet.

Afewothertips:

●Don'

tputthePCinachild'

sroombutkeepitinanareawheremumordadcankeepaneyeonthings.ThatalsomakestheInternetmoreofafamilyactivity.

●Askyourchildwhatheorshehasbeendoingandaboutanyfriendstheymakeon-line.

●Tellyourchildnottogiveon-linestrangerspersonalinformation,especiallydetailslikeaddressandphonenumber.

●Andtellyourchildrennevertotalktoanyonetheymeeton-lineoverthephone,sendthemanything,acceptanythingfromthemoragreetomeetwiththemunlessyougoalong.

5.Thepassageismainlyaboutthesubjectof_________.

A.Americanchildren'

sgoingon-line

B.InternetinAmerica

C.appreciatingInternet

D.opposingInternet

6.Thebestwaytoprotectchildrenfromimpropermaterialsis_________.

A.toinstallacontentscreenerinthecomputer

B.tobuysomesearchenginesforthechildren

C.tobenearbywhentheyaresurfingtheInternet

D.totalktothechildrenandpersuadethemtotellrightfromwrong

7.Whichofthefollowingisrightaccordingtothepassage

A.SurfingtheInternetisthebestmethodofeducatingchildren.

B.Children'

snothavingaccesstoInternetmayhaveeffectontheirprogress

C.UsingacontentscreenerismostreliableforkeepingchildrenhavingaccesstoInternet.

D.Searchenginescanhelpchildrentoselectmaterialsfitforthem.

8.Thepassagetellsmostabout________.

A.SoftwareB.goodguidesC.precautionsD.education

9.Accordingtothepassage,wecaninferthat__________.

A.softwaresfitforchildrenwantprogramming

B.achildwhoison-lineisindanger

C.Internetisajunglefullofdanger

D.Internetcontainslotsofharmfulsites

Recordafterteaching：

_____1642:

Thecomputerbeganasacalculatingmachine

1822:

TheAnalyticalMachinewasmadebyCharlesBabbage.

Thecomputergrewrapidlybothinsizeandinbrainpower.

Thecomputershadgrownaslargeasaroom.

Thefirstfamilyofcomputerswasconnectedtoeachother.

Computerswereusedinofficesandhomes

Computersconnectpeopleallovertheworldtogether.

Recordafterteaching:

Teachers 

can 

also 

add 

more 

practice 

in 

this 

period 

to 

consolidate 

what

the 

Ss 

have 

learned. 

Finally, 

ask 

finish 

checking 

yourself. 

It 

is 

very 

important 

improve 

theirlearning

安全教育：

遵守交通规则，注意人身安全。

在道路上行走，应走人行道。

无人行道时靠右边行走走路时要集中精力，眼观六路，耳听八方。

不与机动车抢道，不突然横穿马路。