高中英语导学案与练习必修二（unit3 computers--period2 learning about language）

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1、Period2LearningaboutLanguageTheGeneralIdeaofThisPeriod：Thisperiodincludesrevisionofthetext、learningaboutlanguage.Fromthisperiodthestudentswilllearnhowtousesomeofthekeywordsandexpressionsinthetextanddosomeexercisesforconsolidation，andlearnhowtousethePresentPer

2、fectPassiveVoice.TeachingAims：1.Helpthestudentstolearntousesomeusefulwordsandexpressions.2.Enablethestudentstolearnhowtousethepresentperfectpassivevoice.TeachingImportantPoint：Theuseofthepresentperfectpassivevoice.TeachingDifficultPoints：Howtomastertheusageso

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

4、methingaboutthehistoryanddevelopmentofcomputers.Nowwhowouldliketoretellthetextwiththehelpofthesefigures?S1：Letmetry.In1642，acalculatingmachinewasusedinFrance.Thenin1922，theAnalyticalMachinewasmadebyCharlesBabbage.Itcouldfollowinstructionsfromcardswithholes.In

5、1936，AlanTuring，therealfatherofcomputers，wroteabooktodescribehowcomputerscouldbemadetoworkandbuilta“universalmachine”tosolveanymathematicalproblem.Later，peoplediscoveredthecomputerhad“artificialintelligence”.Inthe1960s，thecomputergothisnewtransistors.Itssizew

6、astotallychangesatthattime.Andintheearly1960s，thefirstfamilyofcomputerswereconnectedtoeachother.In1970s，computershavebroughtintopeople’shomes.NowcomputershavebeenusedbybillionsofpeopletodealwithinformationandcommunicatewitheachotheraroundtheworldbytheInternet

7、.T：Congratulations!You’vedoneverywell.Nowtrytodothesametoyourpartners，OK!Step2WordsandExpressionsTask1T：PleaseturntoPage19andfinishDiscoveringUsefulWordsandExpressions.Atfirst，lookatEx.1.Fromthereadingpassage，findthewordsandexpressionswiththefollowingmeanings

8、.Now，tenstudentswillbeaskedtogivethewords.Whocan?Volunteers!Checktheanswerstogether.Task2.T：Welldone.NowpleaselookatEx2.andcompletethepassagewithsomeofthewordsabove.Payattentiontotheusean