陕西省蓝田县焦岱中学高中英语必修2Unit3ComputersLearningaboutLanguage教案.doc

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1、优选Unit3putersLearningaboutLanguageTeachingAims：1.Helpthestudentstolearntousesomeusefulwordsandexpressions.2.Enablethestudentstolearnhowtousethepresentperfectpassivevoice.TeachingImportantPoint：Theuseofthepresentperfectpassivevoice.TeachingDifficultPoints：Howtomastertheusa

2、gesofsomeimportantwordsandphrasesandthePresentPerfectPassiveVoice.TeachingMethods：1.Task-basedlearning.2.Cooperativelearning.3.Explanationandpractice.TeachingAids：1.Ataperecorder.2.Amultimedia.TeachingProcedures：Step1RevisionT：Boysandgirls，inlastperiodwelearnedsomethingab

3、outthehistoryanddevelopmentofputers.Nowwhowouldliketoretell8/8优选thetextwiththehelpofthesefigures?S1：Letmetry.In1642，acalculatingmachinewasusedinFrance.Thenin1922，theAnalyticalMachinewasmadebyCharlesBabbage.Itcouldfollowinstructionsfromcardswithholes.In1936，AlanTuring，ther

4、ealfatherofputers，wroteabooktodescribehowputerscouldbemadetoworkandbuilta“universalmachine”tosolveanymathematicalproblem.Later，peoplediscoveredtheputerhad“artificialintelligence”.Inthe1960s，theputergothisnewtransistors.Itssizewastotallychangesatthattime.Andintheearly1960s

5、，thefirstfamilyofputerswereconnectedtoeachother.In1970s，putershavebroughtintopeople’shomes.NowputershavebeenusedbybillionsofpeopletodealwithinformationandmunicatewitheachotheraroundtheworldbytheInternet.T：Congratulations!You’vedoneverywell.Nowtrytodothesametoyourpartners，

6、OK!Step2WordsandExpressionsTask1T：PleaseturntoPage19andfinishDiscoveringUsefulWordsandExpressions.Atfirst，lookatEx.1.Fromthereadingpassage，findthewordsandexpressionswiththefollowingmeanings.Now，tenstudentswillbeaskedtogivethewords.Whocan?Volunteers!Checktheanswerstogether

7、.8/8优选Task2.T：Welldone.NowpleaselookatEx2.andpletethepassagewithsomeofthewordsabove.Payattentiontotheuseandtheformsofthosewords.Thepossibleanswers：networksothatwentbytotallytrulysimple-mindedAnywaydealwithTask3T：PleasefinishEx.3.LookatthesentencesonPage20.Ticktherightword

8、.Thensomeofyouwillbeaskedtoreadthesentencesonebyone.Thepossibleanswers：1.LifetotallychangedwhenI