届一轮复习人教版必修二Unit3Computers单元教案15页word版.docx
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届一轮复习人教版必修二Unit3Computers单元教案15页word版
2019届一轮复习人教版必修二Unit3Computers单元教案
Period1Reading
TheGeneralIdeaofThisPeriod：
ThisperiodincludesWarmingup，ReadingandComprehendingofUnit3.Itintroducesthehistoryanddevelopmentofcomputers.Fromthisperiodthestudentswilllearnmoreaboutcomputers.Meanwhiletheycanlearnsomereadingstrategiessuchasskimmingandscanning.
TeachingAims：
1.Trainthestudents’readingability.
2.Learnsomeusefulwordsandexpressions.
3.Learnmoreaboutcomputers.
TeachingImportantPoints：
1.Helpthestudentstounderstandthepassage
better.
2.Learnhowtousesomeimportantwordsandphrasesinthispassage.
TeachingDifficultPoints：
1.Howtohelpthestudentsimprovetheirreadingabilityandunderstandthepassagebetter.
2.Learnhowtousesomeimportantwordsandphrasesinthispassage.
TeachingMethods：
1.Skimmingthepassagetogetthegeneralideaofthetext.
2.Scanningtogetthedetailsfromthepassage.
3.Explanationsandpracticetohelpthestudentsmastersomelanguagepoints.
4.Discussiontohelpthestudentsunderstandbetterwhatthey’velearnedandtousetheknowledgethey’
velearnedinthisperiod.
TeachingAids：
1.Ataperecorder.
2.Amultimedia.
TeachingProcedures：
Step1Warmingup
1.Greetingthestudentsasusual.
2.Introducethetopicofcomputers
Showthefivepictures（anabacus，ahugecomputer，acalculator，aPC，anotebookcomputer）andgetthestudentsnametheminEnglish.Throughthistask，st
udentscanhaveageneralideaaboutwhattheyaregoingtolearn.Besides，studentsareexpectedtohaveadiscussionaboutwhattheyhaveincommonwhilelookingatthem.Andtheyarerequiredtousethegivenexpressionsintheirdiscussiontoexpresstheirideas.
T：
B
oysandgirls，todayIamgoingtointroducesomemachinestoyou.Nowlet’sseewhetheryoucannametheminEnglishcorrectly，andtalkaboutthem.Nowworktogetherwithyourpartnersandtrytofindoutwhattheyhaveincommon.
Twominuteslate，fivestudentsareaskedtotalkabouttheminclass.
S1：
AnabacusisanoldcalculatingmachineusedinChinauntilnow.
S2：
Ahugecomputerisbuilttosolvesomemathematicalpro
blems.But，inmyopinion，itistoobig.
S3：
Acalculatorisanewcalculatingmachinewhichcansolvealargenumbermathematicalproblems.AndIthinkitisveryconvenienttocarryanduse，soweofte
nuseit.
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.Butdoyouknowmoreaboutcomputersandcanyousaysomethingabouthowcom
putershavechangedourlives.
Step2Pre-reading
Showthequestionsonthescreen.
T：
Now，pleasehaveadiscussionfirst，andthenI’llasksomestudentstoreportyourwork.
Afterafewminutes.
T：
Now，whowouldliketoanswerthefirstquestion?
Voluntee
r!
S9：
I’llhaveatry.Iknowthatcomputershavedevelopedfromlargemachines.Theyhavebeenmadesmallerandsmaller，butworkfasterandfaster.Ireallycan’timaginewhattheywillbelikeandwh
ethertheycantaketheplaceofhumanbeingsinthefuture.
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.Butlearningmoreaboutcomputersisalsoimporta
nt，isn’t
it?
OK，let’scometothereadingpassage“WhoamI”.
Step3Reading
Task1.Skimthepassageforthegeneralidea.
T：
Boysandgirls，youwillbegiventwominutestoskimthepassageandtrytofindoutwho“I”amandgetthegeneralideaofthispa
ssage.
Aftertwominutes.
T：
Timeisup.Whowouldliketotelluswho“I”amandgivethegeneralideaofthetexttotheclass?
Volunteer!
S12：
Ofcourse，“I”amthecomputer.Thepassageismainlyaboutthehistoryanddevelopmentofcomputers.
S13：
Thepassage
isalsoabouttherelationshipofcomputersandhumans.
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!
Step4Comprehending
Task3.Fillinthetimelinetorememberthefacts.
T：
Butcanyoumemorizefactslikeacomputer?
Iamafraidyoucannot.Butlet’strytorememberthefactsinthepassagebyfilinginthetimelineonPage19，which，Iamsure，willhelpyourememberthefactseasily.
Suggestedanswers：
Timeline
1642：
Thecomputerbegana
sacalculatingmachine.
1822：
TheAnalyticalMachinewasbuiltbyCharlesBabbage.
1936：
AlanTuringwroteabooktodescribehowcomputerscouldbemade.
1960s：
Computershadnewtransistorsandbecamesmaller.
1960s：
Thefirstfamilyofcomputersconnectedtoeachother.
1970s：
Computerswerebroughtintopeople’shomes.
Now：
Computersconnectpeopleallovertheworldtogether.
T：
Haveyoufinished?
Ifso，pleasecheckyouranswersyourself.I’msureallofyouhavegotthemright.Nowyoucanretellthehistoryofcomputerseasilywiththehelpofthetimeline，can’tyou?
Pleasehaveatry，boysandgirls!
Step5Homework
1.Recitethekeysentences.
2.PrepareforLearningAboutLanguage.
3.Trytoretellthetextusingabout100words.
Step6TheDesignoftheWritingontheBlackboard
Unit3Computers
Period1
Thegeneralideaofthetext：
Questions
1.Wherewereyouin1642?
2.Whathappenedtoyouin1822?
3.Whatwereyoucalledin1936?
4.Whatdidyougetinthe1960s?
5.Whathappenedtoyouinthe1970s?
Languagepoints：
1.incommon/have...incommon（with）...
2.inone’sopinion
3.dealwith
4.simple-minded
5.“as”and“with”
6.“Thereweretimeswhen...”
Step7RecordafterTeaching
Period2LearningaboutLanguage
TheGeneralIdeaofThisPeriod：
Thisperiodincludesrevisionofthetext、learningaboutlanguage.Fromthisperiodthestudentswilllearnhowtousesomeofthekeywordsandexpressionsinthetextanddosomeexercisesforconsolidation，andlearnhowtousethePresentPerfectPassiveVoice.
TeachingAims：
1.Helpthestudentstolearntousesomeusefulwordsandexpressions.
2.Enabl
ethestudentstolearnhowtousethepresentperfectpassivevoice.
TeachingImportantPoint：
Theuseofthepresentperfectpassivevoice.
TeachingDifficultPoints：
HowtomastertheusagesofsomeimportantwordsandphrasesandthePresentPerfectPassiveVoice.
TeachingMethods：
1.Task-basedlearning.
2.Cooperativelearning.
3.Explanationandpractice.
TeachingAids：
1.Ataperecorder.
2.Amultimedia.
TeachingProcedures：
Step1Revision
T：
Boysandgirls，inlastperiodwelearnedsomethingaboutthehistoryanddevelopmentofcomputers.Nowwhowouldliketoretellthetextwiththehelpofthesefigures?
S1：
Letmetry.In1642，acalculatingmachinewasusedinFrance.Thenin1922，theAnalyticalMachinewasmadebyCharlesBabbage.Itcouldfollowinstructionsfromcardswithholes.In1936，AlanTuring，therealfatherofcomputers，wro
teabooktodescribehowcomputerscouldbemadetoworkandbuilta“universalmachine”tosolveanymathematicalproblem.Later，peoplediscoveredthecomputerhad“artificialintelligence”.Inthe1960s，thecomputergothisnewtransistors.Itssizewastotallychangesatthattime.Andintheearly1960s，thefirstfamilyofcomputerswereconnectedtoeachother.In1970s，computershavebroughtintopeople’shomes.Nowcomputershavebeenusedby
billionsofpeopletodealwithinformationandcommunicatewitheachotheraroundtheworldbytheInternet.
T：
Congratulations!
You’vedoneverywell.Nowtrytodothesametoyourpartners，OK!
Step2WordsandExpressions
Task1
T：
PleaseturntoPage19andfinishDiscoveringUsefulWordsandExpressions.Atfirst，lookatEx.1.Fromthereadingpassage，findthewordsandexpressionswiththefollowi
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