大庆外国语学校高一英语教案：M5（2）（外研版）

学必求其心得，业必贵于专精学必求其心得，业必贵于专精学必求其心得，业必贵于专精Teachinggoals教学目标1.Targetlanguage目标语言Englishnumbers2.Abilitygoals能力目标HelpthestudentstoreadandwritesomeEnglishnumberscorrectly。Helpthestudentsfindthemainpartsofanexperimentwhiletheyarelistening.3.Learningabilitygoals学能目标Helpthestudentsknowtherulesofexpressingnumbers.Helpthestudentsguessthemainpartsofalisteningmaterialfromthetips。Teachingimportantpoints教学重点LetthestudentspayattentiontothekeywordsinthematerialsaboutAim，Equipment，Method，Result，andConclusion。Teachingdifficultpoints教学难点HelpthestudentsreadsomelargeEnglishnumbers.Teachingmethods教学方法Listeninganddiscussion。Teachingaids教具准备Aprojectorandarecorder。Teachingprocedures＆ways教学过程与方式StepⅠRevisionCheckthestudents’homework.ForExercises6and7,givethemanswersheet。ForExercise8，ask10studentstoreadoutthecompletesentencesonebyone。Theyshouldpayattentiontotheirpronunciationandintonation.StepⅡListeningandWritingThisisacontinuedparttothereadingmaterial。Thestudentscangetmorefamiliarwithsomenewwordsandexpressions，andalsogetfamiliarwiththedescriptionofanexperiment.AskthestudentstoscanthethreeactivitiesinLISTENINGANDWRITINGonP46，sothattheyknowwhattheyaregoingtodo，andtrytogetreadytocatchthekeywordsorkeysentenceswhentheyarelistening.T:Now,pleaseturntopage46.Wearegoingtohavealistening.Atfirst,scanthethreeinstructionstoknowwhatyouaregoingtodo。Severalminuteslater.T：Doyouknowwhatyouaregoingtodo?Ss:Yes.T:What’sthefirstone？S1：ToreadtheAimbelowandpredicttheResult.T：Whatisyourprediction？S1:Ithinktherearetworesults.Oneisthatthemagnesiumisheavierthanbefore.Theotheristhatitbecomesalittlelighterthanbefore.It'sdifficulttogetaresult，unlesswemakeanexperiment.T：Good，thisisacorrectattitudetowardsscience.Now，we'lllistentotheconversationtofindtheresult。Sopleaselistencarefullyandwritedownthekeywords。Playtherecorderforthestudentstohaveafirstlistening。Afterthat，letthestudentswritedowntheiranswersusingthekeywords。Ifpossible，askthemtowritethewholesentences。T：Nowlet’slistenandcompletethedescriptionofthescientificexperiment。We'veknowntheAimandResult。WhatweshouldfocusonisApparatus，MethodandConclusion。AndforMethod，weshouldpayattentiontothefunctionwords:first,then，next，afterthat，andlastly.Doyouremember？Ss:Yes。T:OK，let'slistenagain。Playthetaperecorderagain.Thestudentslistentotherecorderandcompletetheirsentences。Atlast，collecttheanswers。StepⅢListeningandSpeaking（P95)Thisisanotherexperimentforthestudentstohavealistening。Thepurposeofthelisteningisthesameastheaboveone.Askthestudentstoreadtheexercisesbeforelistening，includingExercises13,14and15，sothattheyknowclearlywhattheyaregoingtodo.T:Now,we'llhaveanotherlistening。Areyouclearaboutwhatyouaregoingtodo?Ss：Yes.T：OK，forExercise13,wehavetodecidewhattheaimoftheexperimentis.Andthendecidethecorrectorderofthestages.So，firstlookatthepictures，workinpairstodescribewhattheboyisdoing.Letthestudentsdothejob，andthencollecttheirdescriptions。T:Well，justnow,Icollectedsomeofyourdescriptionsaboutwhattheboyisdoing.Lookatthesentencesonthescreen。Writethefollowingsentencesonthescreen。a)Bobiswritingaconclusion。b）Heissqueezingalemon.c)Heisgoingtofirethepaper。d)Thisistheaimoftheexperiment。e)Hejustlightedacandle.f）Heisgoingtowritesomethingonthepaper。g）Heisblowingthepaper。T：Allofthesedescriptionsareverygood。Nowlet’slistentothetapetofindtheaimandputthestagesinthecorrectorder。Afterthestudentsfinishthetask，checktheiranswerswiththewholeclassbylisteningtothematerialagain。T：Well，it’stimeforustohaveaspeaking。LookatExercise15。Takeitinturnstodescribetheexperiment.Usethesewordsandphrasesinthebox.Givethestudentssometimetodothejob.Andthenaskoneortwoofthemtoreadouttheirdescriptions.Teachercanalsoleavethispartashomework。StepⅣVocabularyandSpeakingInthisparthelpthestudentsmastertherulesofreadingEnglishnumbers.Thereare3tasksinthisstep：Task1，Activity1；Task2,Activity2;Task3，Activities3and4.Task1：Activity1T:Todaywe’lllearnhowtoreadsomeEnglishnumbers。PleaselookatScreen1,PartA.Therearesomenumbersonit.Findtherulesandthenworkinpairstoreadthemcorrectly。Screen1：A2202002,00020,000200,0002,000，00020，000，000200,000，0002，000，000,000B1221231,23412,345123,4561，234,56712，345，678123,456，7891，234,567,890Severalminuteslater.T：Doyoufindtherulesofthesenumbers?S1：Itseemsthatthreezerosareusedasaunit。T:Right。Howdoyouread20，000？S1：Twentythousand。T:Howabout200,000？S1：Twohundredthousand。T：Howabout2，000,000？S1:Twothousandthousand。T:I’mafraidyouarewrong。Itshouldbetwomillion。S1：Sorry,Iforgetit。T:OK,howabout20,000，000？S2:It'stwentymillion.T:Right.Howabout200,000，000？S3：That’stwohundredmillion.T：Whatabout2，000，000，000?S4:Thatistwothousandmillion。T:Right。ThisisthewaythatEnglishnumbersareread.Americanwouldliketoreadlikethis:twobillion。Youdidverywell。Sitdown，please.Now,let’slookatthescreen。HereisthewayswereadEnglishnumbers。Pleasepayattentiontotheboldface。That’stheunitofthenumbers.Screen2:200 Twohundred2，000 Twothousand20,000 Twentythousand200,000 Twohundredthousand2，000,000 Twomillion20，000，000 Twentymillion200,000，000 Twohundredmillion2,000，000，000 TwothousandmillionortwobillionLetthestudentsreadthenumbersonScreen2andthenreadnumbersinPartBinScreen1。Letthemworkinpairstodothejob,andthenaskthemtoreadthenumbersoutindividually。S：。。.T:Nowlet’slookatScreen3。Thesearethewayswereadandwritethenumbers。Screen3:22 Twenty-two123 Onehundredandtwenty-three1,234 Onethousand，twohundredand thirty—four12,345 Twelvethousand,threehundred andfifty—five123，456 Onehundredandtwenty—threethou- sand,fourhundredandfifty-six1，234，567 Onemillion，twohundredandthirty -fourthousand，fivehundredand sixty—seven12,345,678 Twelvemillion，threehundredand forty-fivethousand，sixhundred andseventy-eight123,456，789 Onehundredandtwenty—threemil— lion，fourhundredandfifty-six thousand,sevenhundredandeighty—nine1，234，567，890 Onebillion，twohundredandthirty- fourmillion,fivehundredandsixty— seventhousand,eighthundredand ninetyTocheckwhetherthestudentshavemasteredthewayofreadingEnglishnumbers,letthemlookatthenumbersinActivity1.Therearetwomistakes.Letthestudentsreadthenumbersandfindthemistakes。T：NowtherearesomenumbersinActivity1onpage42。Therearetwomistakesinthem。Readthenumbersandthenfindthemistakes.AfterthatI’llasksomeofyoutotellthemistakes.Later.T:Whatarethemistakes?S1：OneisinNumber1。Theword“thousand”ismissingafter“fourhundredandseventy”。TheotherisinNumber2.Theword“one"(or“a"）ismissingbefore“hundredmillion”.T:Quiteright。That'sallforActivity1.Task2：Activity2Now,let’sturntoActivity2。Lookatthefractionsandthewayofsayingthem。What'stherule？S1:Theupperonesarecardinalnumbersandtheloweronesareordinalnumbers。T:Right.Whendoweusepluralforms？S2：Whentheupperoneismorethanone。T：Right.Butthewayyouaresayingisveryinteresting.InEnglish,whatyoucall“upperone"iscallednumeratorofafraction;whilethe“lowerone”iscalleddenominator.Now,let’sreadthesefractionsinEnglish:2/5，5/8,9/10,3/8,5/6.Studentsreadthefractions。Task3:Activities3and4T：Now，let'slookatActivity3。DescribethefractionsinActivity2aspercentages。Askthestudentstoworkinpair