人教版高中英语教案-必修二（Unit3 Computers--Period1 Reading）4页

Period1ReadingTheGeneralIdeaofThisPeriod：ThisperiodincludesWarmingup，ReadingandComprehendingofUnit3.Itintroducesthehistoryanddevelopmentofcomputers.Fromthisperiodthestudentswilllearnmoreaboutcomputers.Meanwhiletheycanlearnsomereadingstrategiessuchasskimmingandscanning.TeachingAims：1.Trainthestudents’readingability.2.Learnsomeusefulwordsandexpressions.3.Learnmoreaboutcomputers.TeachingImportantPoints：1.Helpthestudentstounderstandthepassagebetter.2.Learnhowtousesomeimportantwordsandphrasesinthispassage.TeachingDifficultPoints：1.Howtohelpthestudentsimprovetheirreadingabilityandunderstandthepassagebetter.2.Learnhowtousesomeimportantwordsandphrasesinthispassage.TeachingMethods：1.Skimmingthepassagetogetthegeneralideaofthetext.2.Scanningtogetthedetailsfromthepassage.3.Explanationsandpracticetohelpthestudentsmastersomelanguagepoints.4.Discussiontohelpthestudentsunderstandbetterwhatthey’velearnedandtousetheknowledgethey’velearnedinthisperiod.TeachingAids：1.Ataperecorder.2.Amultimedia.TeachingProcedures：Step1Warmingup1.Greetingthestudentsasusual.2.IntroducethetopicofcomputersShowthefivepictures（anabacus，ahugecomputer，acalculator，aPC，anotebookcomputer）andgetthestudentsnametheminEnglish.Throughthistask，studentscanhaveageneralideaaboutwhattheyaregoingtolearn.Besides，studentsareexpectedtohaveadiscussionaboutwhattheyhaveincommonwhilelookingatthem.Andtheyarerequiredtousethegivenexpressionsintheirdiscussiontoexpresstheirideas.T：Boysandgirls，todayIamgoingtointroducesomemachinestoyou.Nowlet’sseewhetheryoucannametheminEnglishcorrectly，andtalkaboutthem.Nowworktogetherwithyourpartnersandtrytofindoutwhattheyhaveincommon. Twominuteslate，fivestudentsareaskedtotalkabouttheminclass.S1：AnabacusisanoldcalculatingmachineusedinChinauntilnow.S2：Ahugecomputerisbuilttosolvesomemathematicalproblems.But，inmyopinion，itistoobig.S3：Acalculatorisanewcalculatingmachinewhichcansolvealargenumbermathematicalproblems.AndIthinkitisveryconvenienttocarryanduse，soweoftenuseit.S4：APCisapersonalcomputer，whichcansolveallkindsofproblemsandiswidelyusedinoffices，schools，shops，athomes，etc.now.S5：Anotebookcomputerisakindofusefulcomputerwhichcanbetakenconvenientlylikeanotebook.ButIthinkitistooexpensive.T：Quitegood.Itseemsthatyouareallquitefamiliarwiththesemachines.Butcanyoutellwhattheyhaveincommon?Anyvolunteers?S6：Letmetry.Ithinktheyallcalculatesomething.Theycandealwithsomemathsproblems.S7：Ibelievethattheyareourgoodfriends.Withtheirhelpwecanfinishourworkquickly.S8：The21thcenturyisthecenturyofinformationtechnology.Asmiddleschoolstudents，weshouldtrytolearnhowtousecomputers.T：Well，youropinionsareallright.Indeed，thesemachinesallcancalculatesomething.What’smore，fromtheabacustothenotebookcomputer，thereisalongway.Butnowcomputershavealreadychangedourlivesgreatly.Butdoyouknowmoreaboutcomputersandcanyousaysomethingabouthowcomputershavechangedourlives.Step2Pre-readingShowthequestionsonthescreen.T：Now，pleasehaveadiscussionfirst，andthenI’llasksomestudentstoreportyourwork.Afterafewminutes.T：Now，whowouldliketoanswerthefirstquestion?Volunteer!S9：I’llhaveatry.Iknowthatcomputershavedevelopedfromlargemachines.Theyhavebeenmadesmallerandsmaller，butworkfasterandfaster.Ireallycan’timaginewhattheywillbelikeandwhethertheycantaketheplaceofhumanbeingsinthefuture.T：Yes，thisisreallyabigproblem.Ithinkyouareallinterestedincomputers，youmaygoonstudyingcomputers，andperhapsonedayyouwilldesignyourowncomputersandbecomethemastersofcomputers.OK!Nextquestion!S10：Ithinkcomputershavechangedourlivesgreatly.Weusecomputerswidelyinourstudy，inourwork.YouareusingthecomputertoteachusEnglish，aren’tyou? S11：Inmyopinion，inthemodernsociety，usingthecomputersmeansgraspingatoolofcontrollingtheworld.Wemaycommunicatewitheachotherfromaverylongdistance.Inshort，wecannotlivefreelywithoutthem.T：Iagreewithyou.Thecomputersarebecomingmoreandmoreimportantinourlives.Butlearningmoreaboutcomputersisalsoimportant，isn’tit?OK，let’scometothereadingpassage“WhoamI”.Step3ReadingTask1.Skimthepassageforthegeneralidea.T：Boysandgirls，youwillbegiventwominutestoskimthepassageandtrytofindoutwho“I”amandgetthegeneralideaofthispassage.Aftertwominutes.T：Timeisup.Whowouldliketotelluswho“I”amandgivethegeneralideaofthetexttotheclass?Volunteer!S12：Ofcourse，“I”amthecomputer.Thepassageismainlyaboutthehistoryanddevelopmentofcomputers.S13：Thepassageisalsoabouttherelationshipofcomputersandhumans.Task2.Scanforthedetails.T：Boysandgirls，youwillbegiventwomoreminutestoscanthepassageandtrytofindouttheanswerstothefollowingquestions.Let’sseewhocanfindouttheanswersmostquicklyandcorrectly.1.Wherewereyouin1642?2.Whathappenedtoyouin1822?3.Whatwereyoucalledin1936?4.Whatdidyougetinthe1960s?5.Whathappenedtoyouinthe1970s?T：Haveyoufinished?S14：Ihave.IwasinFranceasacalculatingmachinein1642.In1822，IwasbuiltasanAnalyticalMachinebyCharlesBabbage.Iwascalled“auniversalmachine”in1936，asIcouldsolveanymathematicalproblem.Inthe1960s，Iwasgivenafamilyconnectedbyanetwork，sothatIcouldshareinformationwithothersandwecouldtalktoeachother.Inthe1970s，Iwasbroughtintopeople’shomes.T：Youaresoquick-mindedthatinsuchashorttimeyoucouldfindoutalltheanswerstothequestions.Yourmindreallyworkslikeacomputer!Step4ComprehendingTask3.Fillinthetimelinetorememberthefacts.T：Butcanyoumemorizefactslikeacomputer?Iamafraidyoucannot.Butlet’strytorememberthefactsinthepassagebyfilinginthetimelineonPage19，which，Iamsure，willhelpyourememberthefactseasily.Suggestedanswers： Timeline1642：Thecomputerbeganasacalculatingmachine.1822：TheAnalyticalMachinewasbuiltbyCharlesBabbage.1936：AlanTuringwroteabooktodescribehowcomputerscouldbemade.1960s：Computershadnewtransistorsandbecamesmaller.1960s：Thefirstfamilyofcomputersconnectedtoeachother.1970s：Computerswerebroughtintopeople’shomes.Now：Computersconnectpeopleallovertheworldtogether.T：Haveyoufinished?Ifso，pleasecheckyouranswersyourself.I’msureallofyouhavegotthemright.Nowyoucanretellthehistoryofcomputerseasilywiththehelpofthetimeline，can’tyou?Pleasehaveatry，boysandgirls!Step5Homework1.Recitethekeysentences.2.PrepareforLearningAboutLanguage.3.Trytoretellthetextusingabout100words.Step6TheDesignoftheWritingontheBlackboardUnit3ComputersPeriod1Thegeneralideaofthetext：Questions1.Wherewereyouin1642?2.Whathappenedtoyouin1822?3.Whatwereyoucalledin1936?4.Whatdidyougetinthe1960s?5.Whathappenedtoyouinthe1970s?Languagepoints：1.incommon/have...incommon（with）...2.inone’sopinion3.dealwith4.simple-minded5.“as”and“with”6.“Thereweretimeswhen...”Step7RecordafterTeaching