高二英语教案Unit3TheworldonlineWelcometotheunitTeachingaims:1.EnablethestudentstoknowmoreabouttheInternetandtalkabouttheInternetanditsusesbymakingadebateontheeffectsoftheInternetonourlives;2.Developthestudents’speakinganddiscussingskillsbytalkingaboutthefourpicturesandsharingideasinagroup;3.HaveafluenttalkonthattheInternetconnectspeopleallovertheworldandthattheInternethasbothpositiveandnegativeaspects.Teacingprocedures:Step1Lead-inLearnabout“computerterms”.(1)Whichprogrammewouldyouliketowatchtonight?→Aprogramissomethingthatweusetocontroloroperateacomputer.(2)Themusicfromthekeyboardsoundslikemusicfromarealpiano.→Akeyboardisasetofkeysonacomputerthathelpyouoperatethecomputer.(3)Ihatetocleanwindows.→WindowsisakindofcomputerprogramdevelopedbyMicrosoft.(4)Memoryissomethingyoumaystarttolosewithage.→Memoryisaspaceintheharddriveofacomputertostoreinformation.(5)Juliewantstohaveapetmouse.→Mouseiswhatyoucontrolwithhandtomovethecursoronthecomputerscreen.Step2Brainstorming1.Doyouknowhowpeoplekeptintouchwitheachotherinthepast?→Peopleusedletters,postcards,telegraphs,faxesandtelephonestocommunicatebeforetheinventionoftheInternet.2.Thenhowpeoplekeepintouchwitheachothernow?→WiththedevelopmentoftheInternet,moreandmorepeoplearenowusingcomputersandtheInternetforcommunication.3.WhatistheInternet?→TheInternetisacollectionofcomputersconnectedinaworldwidenetwork.4.WhatarethefunctionsoftheInternet?→Chatting,shopping,music,etc.5.WhatareyourexperiencesusingtheInternet?Step3PicturestalkingPicture11.Whatcanpeopledoonthiswebsite?(Searchforinformationonavarietyoftopics.)2.Whatdowecallthiskindofwebsitethatprovidessearchingservices?(Wecallitsearchengine.)3.HowtofindinformationontheInternetusingasearchengine?(Enterkeywords.)4.Whatsearchenginesdoyouknoworoftenuse?(Google,Baidu.)Picture21.Whatdoyouthinkwouldbetheadvantagesofshoppingonline?(Asonlineshopkeepersdonothavetopayfortherentalofarealshop,theproductssoldonlineareusuallycheaperthanthoseinrealshops.Itiseasyandconveninenttocompareaproductinseveralonlineshops.Payingforthingsissimpleasyoujustkeyinthecreditcardnumberandconfirmthepaymentonline.Thedeliveryisusuallyquickandtheonlineshopsproividedeliverytoyourhome.Aboveall,shoppingonlinesavesalotoftime.)2.Whatdoyouthinkwouldbethedisadvantagesofonlineshopping?(Becausepeoplecanonlyseepicturesoftheproductsonline,sometimesyoucouldreceivesomethingthatwasnotwhatyoureallywanted.Thesafetyofthepaymentisnot100%guraranteedassomeonemaystealtheaccountnumbersorpinnumbersofyourcreditcardsregisteredonline.Besides,somepeoplefalselyadvertiseproductsandthenstealcustomers’money.)Picture31.Haveyouevertriedtalkingwithyourparentsorfriendsonline?2.Whatdevicesdoyouneedifyouwanttotalkwithpeopleonline?(AcomputerconnectedtotheInterent,aweb-camera,aweb-microphoneandaweb-talikingsoftware…)3.Whatarethegoodpointsandbadpointsofonlinetalking?Positivepoints:Peoplecansavealotofmoneyinsteadofpayingforlong-distancecalls.Peoplecankeepintouchwithfamilymembersorfriendswhereveryouareintheworld.Peoplecanmakenewfriendsindifferentpartsoftheworld.Negativepoints:Thequalityofthepicturesorvoicesdependsonthespeedofnetworktransfer.Manypeoletalkwithinlinefriendswithoutrealizingthattheirpicturescouldbeusedbyothersinillegalways.4.Whichwayofcommunicationdoyouprefer,talkingfacetoface,talkingoverthephone,talkingonlineortalkingonlinewithaweb-camera?Why?Picture41.Haveyoutriedotheronlineservicesthatarenotmentionedhere?Whichones?2.Whatotheronlineservicesdoyouthinkwewillneedorhaveinthefuture?3.WhatroledoyouthinktheInternetwillplayinthefuture?4.Doyouthinkitisagoodideato‘live’ontheInternetcompletely?Step4Discussion1.WhatdoyouthinkthemostimportantbenefitoftheInternetis?(FastspeedandeasyaccessarethemostimportantaspectsoftheInternet.)2.DoyouthinktheInternethasanynegativeaspectstoit?(Yes.Thereistoomuchinformationonlinethathasnotbeenproventobetrue.Therearetoomanyexcitingcomputergames,makingthosewhocan’tcontrolthemselveskilltime.)3.InwhatwayswilltheInternetimproveourlivesinthefuture?(TheInternetwillfreepeoplefromtheoffice.EverypartofahomecanbeconnectedtotheInternet,whichwillmakelifeeasierandmorecomfortable.)Step5Debate:TheadvantagesanddisadvantagesofusingtheInternetStep6Homework1.WriteapassageaboutadvantagesanddisadvantagesofusingtheInternet.2.Previewthereading.
