义务教育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，andlearnhowtousethePresentPerfectPassiveV

2、oice.TeachingAims：1.Helpthestudentstolearntousesomeusefulwordsandexpressions.2.Enablethestudentstolearnhowtousethepresentperfectpassivevoice.TeachingImportantPoint：Theuseofthepresentperfectpassivevoice.TeachingDifficultPoints：Howtomastertheusagesofsomeimportantwordsandph

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

4、ofcomputers.Nowwhowouldliketoretellthetextwiththehelpofthesefigures?S1：Letmetry.In1642，acalculatingmachinewasusedinFrance.Thenin1922，theAnalyticalMachinewasmadebyCharlesBabbage.Itcouldfollowinstructionsfromcardswithholes.In1936，AlanTuring，therealfatherofcomputers，wroteab

5、ooktodescribehowcomputerscouldbemadetoworkandbuilta“universalmachine”tosolveanymathematicalproblem.Later，peoplediscoveredthecomputerhad“artificialintelligence”.Inthe1960s，thecomputergothisnewtransistors.Itssizewastotallychangesatthattime.Andintheearly1960s，thefirstfamily

6、ofcomputerswereconnectedtoeachother.In1970s，computershavebroughtintopeople’shomes.NowcomputershavebeenusedbybillionsofpeopletodealwithinformationandcommunicatewitheachotheraroundtheworldbytheInternet.T：Congratulations!You’vedoneverywell.Nowtrytodothesametoyourpartners，OK

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

8、Task2.T：Welldone.NowpleaselookatEx2.andcompletethepassagewithsomeofthewordsabove.Payattentiontotheusean