Unitampnbsp3ampnbspComputers教案

　　unit3computers
　　the4thperiod：speaking
　　goals：
　　1。topractiselisteningcomprehension。
　　2。topractisemakingdecisionsandreasoning
　　teachingprocedures：
　　step1。revision
　　1。checkthehomeworkexercises。
　　1）。ithasbeenreportedthatchildrenwillbeofferedfreeeducation
　　ithasbeenreportedthatfreeeducationwillbeofferedtochildren
　　2）。ithasbeensaidthatwewillbeofferedthelatestcomputersciencecoursebook
　　ithasbeenplannedthatthelatestcomputersciencecoursebookwillbeofferedtous
　　3）。ihavebeentoldbypeterthatiwillbelenthisnotebookcomputerforaweek
　　ihavebeentoldbypeterthathisnotebookcomputerwillbelenttomeforaweek
　　2。question：whatcancomputersbeusedas？
　　step2。leadin
　　asweknow，scienceandtechnologyisdevelopingveryfastandcomputershavebecomesmallerandsmaller。theyhavebeenusedinmanyfields。so，the21stcenturyisthecenturyofinformationtechnologywhatdoesitmean？doesinformationtechnologyitonlymeanthingslikecomputers？ofcausenot。actually，itmeansmorethancomputers。computersarejustonekindofit。whatelsedoyouknowispartofit？
　　（tv，radio，cdrom，dvd，books）
　　step3。listening（sb）
　　1。prelistening：whatarethechangesbroughtbydifferentformsofit？
　　whataretheadvantagesanddisadvantagesofthem？
　　2。whilelistening：
　　gothroughthechartandmakesurethestudentslookatthechartbeforetheylistentothetape。（thisistosharpentheirattentionandlistenfortheanswers。thiswillalsohelpthemgetthegistofthetext。）thenlistentothetapeandfinishfillinginthechart。（ifnecessary，playthetapeforseveraltimes。）
　　say：afterlisteningtotheirtalk，weknowallkindsofithavebothdisadvantagesandadvantageslet’schecktheanswerstogether。
　　typeofitadvantagesdisadvantages
　　tvyoucanbothlistenandwatchyoucannotwritetofriends
　　webyoucanfindinformationitisveryexpensive
　　radioyoucanlistentoenglishyoucannotwatchafilm
　　bookyoucangetinformationsometimesitisoutofdate
　　3。postlistening：
　　1）（pairwork）：decidewhichtypeofitisbestforyoutouserightnow。makeyourchoiceandgiveyourreasonsbyusingthefollowingexpressions。
　　ithinkthat。
　　inmyopinion，。
　　ibelievethat。
　　iagreebecause。
　　idisagreebecause。
　　i’vedecidedthat。
　　2）（groupwork）：discussion：
　　computersareusefulandhavebroughtuslotsofgoodthings，buttheyalsocausebadeffects。whatattitudeshouldwehavetowardsthecomputer？（makegooduseofitbutnevergettrappedbyit。）
　　step4。speaking
　　1。prespeaking
　　say：fromwhatwehavelearn，weshouldadmitthatcomputersandthewebhaveagreatinfluenceontheschooleducationaswellaspeople’slife。ithascomeintopeople’severydaylifeandmanyfamiliesholdcomputersintheirhomes。nowthereisataskforyou。
　　2。whilespeaking
　　1）situation：youhavebeenaskedbyyourparentstohelpchoosecomputersforyourhome。youandyourfriendhavelookedatseveralcomputers。talkaboutthespecialthingseachcomputercando。makeadecisionaboutwhichkindofcomputertobuyandexplainwhy。
　　informationinput：showstudentssomepicturesofdifferentcomputers（）
　　languageinput：usefulexpressions（repeatittostrengthenstudents’abilityofuseit。）
　　supportinganopinionchallenginganopinion
　　ithinkthat，becauseperhaps，butwhatifabout？
　　first，haveyouthoughtabout？
　　onereasonisthatwhatmakesyouthinkthat？
　　ithinkitisbetterbecauseidon’tlikeitbecause。
　　（pairwork）usetheexpressionstosupportyouropinionorchallengingother’sopinions。
　　2）oralreport：（inpidualwork）
　　doanoralreporttoyourfatherandstartyourreportlikethis：ilookedatmanydifferentcomputers。theoneihavechosenisthepeppersonalcomputer。oneofthemainreasonsisthatitissuitableforhomes。ifoundthat
　　3。postspeaking
　　conclusionwhatusefulexpressiondoweusetomakeadecisionandreason？
　　（inthisway，theycanreviewandusethewordsandphrasesagain。）
　　step5。homework
　　page22。writing：writeareportaboutyourchoiceandtrytousethepresentperfectpassivevoiceaswellastheusefulwordsandexpressionsthathavebeenmentionedabove。inyourreport。