Unit3TheworldonlineWelcometotheunit教学设计单元：Unit3Theworldonline板块：WelcometotheunitThoughtsonthedesign:本节课以说为主，通过“Welcometotheunit”部分所提供的四幅图片构成的海报，介绍了因特网及其用途。学生将学会谈论把世界连接起来的因特网，因特网所带来的好处和不利之处，以及因特网将来的用处。通过对该部分相关问题的讨论，帮助学生获得更多关于英特网的信息，为更深入学习本单元内容奠定基础。Teachingaims:1.Afterlearningthislesson,thestudentswillbeabletoknowmoreabouttheInternet,andtalkabouttheInternetanditsusesbymakingadebateontheeffectsoftheInternetonourlives;2.Afterlearningthislesson,thestudentswilldevelopspeakinganddiscussingskillsbytalkingaboutthefourpicturesandsharingideasinagroup;3.ThestudentswillhaveafluenttalkonthattheInternetconnectspeopleallovertheworldandthattheInternethasbothpositiveandnegativeaspects.Teachingprocedures:Step1Lead-in(PPT5-9)1.Talkaboutthecomputer.2.Learnabout“computerterms”.(1)Whichprogrammewouldyouliketowatchtonight?→Aprogramissomethingthatweusetocontroloroperateacomputer.(2)Themusicfromthekeyboardsoundslikemusicfromarealpiano.→Akeyboardisasetofkeysonacomputerthathelpyouoperatethecomputer.(3)Ihatetocleanwindows.→WindowsisakindofcomputerprogramdevelopedbyMicrosoft.(4)Memoryissomethingyoumaystarttolosewithage.→Memoryisaspaceintheharddriveofacomputertostoreinformation.(5)Juliewantstohaveapetmouse.→Mouseiswhatyoucontrolwithyourhandtomovethecursoronthecomputerscreen.[Explanation]生活、学习中我们常用电脑，学生已经掌握相当的电脑知识并了解因特网的作用，有丰富的背景知识，但用英文表达能力还欠缺。通过谈论电脑和学习电脑相关术语，能让学生更好地表达，从而顺利导入本课主题。Step2Brainstorming(PPT10-12)1.Doyouknowhowpeoplekeptintouchwitheachotherinthepast?(Peopleusedletters,postcards,telegraphs,faxesandtelephonestocommunicatebeforetheinventionoftheInternet.)2.Thenhowpeoplekeepintouchwitheachothernow?(WiththedevelopmentoftheInternet,moreandmorepeoplearenowusingcomputersandtheInternetforcommunication.)3.WhatareyourexperiencesusingtheInternet?4.WhatistheInternet?(TheInternet,alsocalledtheNet,isacollectionofcomputersconnectedinaworldwidenetwork.)5.WhatarethefunctionsoftheInternet?(Chatting,shopping,music,etc.)[Explanation]通过激活学生的大脑思维，学生在规定的时间内，尽可能多地将大脑中刚刚组织起来的话语与老师、同学交流。将集体回答、个体回答穿插在一起，每个问题的回答时间适中学生在被激活的知识图式中搜索有关的素材，使它们像涓涓细流汇集起来，幸福、流畅、自由地向远方流淌。Step3Sharinginformation(PPT13-20)Discussthefourpicturesoftheposter“Aworldofconnections”.EncouragestudentstoexpresstheirunderstandingaboutthedifferentusagesoftheInternetandhaveagoodimaginationofwhattheInternetbringsusinthefuture.Nowworkinpairsandhaveadiscussionabouteachofthepictures.Picture11.Whatcanpeopledoonthiswebsite?(Searchforinformationonavarietyoftopics.)2.Whatdowecallthiskindofwebsitethatprovidessearchingservices?(Wecallitsearchengine.)3.HowcanyoufindinformationontheInternetusingasearchengine?(Enterkeywords.)4.Whatsearchenginesdoyouknoworoftenuse?Whichisyourfavouritesearchengine?(Google,Baidu.)Picture21.Whatdoyouthinkwouldbetheadvantagesofshoppingonline?(Asonlineshopkeepersdonothavetopayfortherentalofarealshop,theproductssoldonlineareusuallycheaperthanthoseinrealshops.Itiseasyandconveninenttocompareaproductinseveralonlineshops.Payingforthingsissimpleasyoujustkeyinthecreditcardnumberandconfirmt...
