高二英语下学期Unit 19.docx

高二英语下学期Unit 19.docx

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高二英语下学期Unit19

Unit19Modernagriculture

.TeachingGoals:

1.Talkaboutmodernagricultureandtheeffectsithasonpeople'slife.

2.Improvethestudents'speakingandreadingabilitybypractisingandgetthestudentstolearnmoreaboutagriculture.

3.Practisegivingadviceandmakingdecisions.

4.Use“It”foremphasis.

5.Readstatisticalgraphs.

6.Writeaplanforavegetablegarden.

TeachingTime:

Fiveperiods

TeachingImportantPoints:

1.Howtoexpressoneself,usingwhatislearnedorgiven.

2.Howtoadvisesb.todosomethingandhowtomakedecisions.

TeachingDifficultPoints:

1.Theusageofsomeexpressions.

2.Howtoimprovethestudents'listeningability.

TeachingMethods:

1.Discussiontoletthestudentsexpressthemselvesfreely.

2.Groupworkorpairworktogiveeverystudentachancetoexpressthemselves.

TeachingAids:

1.aprojectorandsomeslides

2.acomputer

TheFirstPeriod

TeachingProcedures:

StepI.GreetingsandRevision

T:

Goodmorning,everyone.

Ss:

Goodmorning,teacher.

T:

Sitdown,please.Inthisclass,I'llcheckyourhomeworkfirst.（Theteacherchecksthestudents'homeworkandhaveadiscussionwiththestudentsaboutthemistaketheymade.Letthestudentshaveaclearunderstandingandcorrectit.）

StepII.Preparationsforthenewunit

T:

Today,we'regoingtolearnanewunit,Unit19,ModernAgriculture（Teacherwritesthefollowingontheblackboard:

Unit19Modernagriculture,theFirstPeriod）.First,let'slearnthenewwordsofthisperiod.（to“gene”）

（Teacherasksonestudenttoreadthenewwords,thencorrectsthemistakesthestudentmade.Thenteachthemsomewordstransformation）

StepIII.Warmingup

T:

Withthetimepassingby,people’slivingstandardisbecominghigherandhigher.Asaresulttheireatinghabitshavechargedalot.Todaywearegoingtoknowsomedetailsaboutitbywatchingthegraphs.

T:

PleaseturntoPage43.Let'sdoWarmingup.（TeachershowsthegraphsonPage43onthescreen.）LookatthetwographsanddiscussthequestionsonPage43.Youcandoitinpairsorgroups.Inafewminutes,I'llasksomestudentstotalkaboutthem.（Studentsbegintodiscussthequestions.Andteachergoesandjoinsthem.）

Presenttheresultsformeachgroups.

T:

Areyouready?

Whocangiveusatalkaboutthefirsttopic?

SA,howarepeople'seatinghabitschangingovertheyears?

SA:

Fromthefirstgraph,wecanseethattheeatinghabitsofthepeopleinourcountryhavechangedgreatly.Beforethereformingandopeningtotheworld,grainwasstillabigproblem.Peoplemainlylivedoncornandfewkindsofvegetables.Sincethe1980s,especiallythe1990s,people'seatinghabitshavegreatlyimproved.Peoplecaneatwhatevertheywant.Moreandmorepeopleeatlessgrain,moremeatandeggsandsoon.Moreandmorepeopleturntheireyestomeat,eggs,milkandallkindsofgreenvegetables.

T:

Whydoyouthinkthishappens,SB?

SB:

ItisallbecauseoftheParty'sgoodpolicies.

T:

Verygood.Itistrueandeveryonecanseethat.Howhasagriculturalproducechangedduringthefirsthalfofthe1990s?

Andwhatdoyouthinkcausedthesechanges?

SC:

Fromthefirsthalfofthe1990s,scientistsstartedtodevelopnewtechniquestoincreaseagriculturalproductionwithoutcausingdamagetotheenvironment.Especiallythenewtechnique,“GM”,hasmadeagriculturalproductionincreasecontinuously.Scientistsdevelopnewkindsofseeds,bettercows,pigs,sheepaswellasfish.Itisthenewtechniquesthatmakeallthispossible.

T:

Doyouagreewithhim,SD?

SD:

Yes,Ido.AndIwanttogiveananswertothethreequestion.

T:

Good,pleasesaythat.

SD:

Withthechangesinpeople'seatinghabits,agricultureaswellasnaturewillhavetochange,too.Peopleareeatingmoremeatandmilk.Thatistosay,theyneedmorefish,pigs,sheepandcattleaswellaspoultry.Tofeedtheseanimals,weneedmoregrain,especiallymoregrass.Toprotectourenvironment,thewaystoraiseanimalshavechanged.Withthedevelopmentofmodernscienceandtechniques,someofthefieldsarenotneededtoproducemorefood.Wecangrowgrass,flowersetc.onthem.Lessfarmersareneededandtheycandootherkindsofwork.

StepIV.Listening

Afterbriefconclusioncometolisteningtask.

T:

Somuchforthediscussion.Nextwe'lldolistening.Thepassageyou'lllistentoisaboutfarming.Ittellsusaboutfarmingofallcountriesinearlytimesandprotectionofnatureandenvironment.Listentothetapecarefullyanddotheexercisesconcerned.Now,readtherequirements,please.（Studentsreadtherequirements.）Nowdoyouknowwhatyou'llhavetodoafterlisteningtothepassage?

（Ss:

Yes.）Duringlistening,I'llplaythetapethreetimes.Afterlisteningforthefirsttime,youcanleaveovertheonesyouarenotsureabout.YoucandothemwhenIplaythetapeforthesecondorthethirdtime.Checkyouranswerswithyourpartnerafterlistening.Areyouclear?

（Ss:

Yes.）（Atlast,teachershowstheanswersonthescreen.）

StepV.Speaking

T:

Nowlet'sdospeaking.Thispartsaysthatagroupoffarmersinyourareahavebeengivenalargepieceofland.Thevillagerstogetherwiththevillageleaderhavetodecidehowtousetheland.Workingroupsoffivestudents.Eachgroupmemberwillplayoneoftheroles.Preparerolecards,discusstheproblemandtrytomakeadecision.Beforediscussion,whocangiveussomeusefulexpressionsaboutgivingadviceandmakingdecisions?

Givingadvice:

SE:

Myadvicewouldbe….Iadviseyoutodo….

SF:

Ithinkyououghtto….You’dbetter….

SG:

IfIwereyou,Iwould….Iwouldadviseyou.

SH:

Idon'tthinkyououghtto….

Makingadecision:

SI:

Inmyopinion,weshould…Ithink/believeyoushould…

SJ:

Idon'tthinkitisnecessarytodosth.….Wemustdecide….

SK:

Ihopewecanmakeadecision.

（TeacherwritesalltheexpressionsaboveontheBb.）

T:

Nowlet'shaveadiscussion,usingtheexpressionsontheblackboardlater,I'llasksomestudentstoactitout.

Sampledialogue:

Sa—villagerA;Sb—villagerB;

Sc—villagerC;Sd—villagerD

Se—thevillageleader

Se:

Asweallknow,wearegivenalargepieceofland.I'vegotallofusheretohaveadiscussionanddecidehowtousetheland.Pleasegiveusyouradvice.

Sa:

Iadviseweshouldgrowcornonthispieceofland.It'slargeandflatandmachinescangoupanddownit,sowecanspendlesstimeandgetmorecorn.Alotofmoneycanbemadeaftersellingthecorn.

Sb:

Ithinkweoughttobuildafarmthereandraisepigsorcowswiththegrainweharvest.Sowecanmakemoremoney.

Sc:

Myadviceisthatweshouldturnitintoagarden,andgrowflowersthere.Thenwecanselltheflowers.Thereisnobodyheresellingflowers.SoIthinkourbusinesswillsurelybegood.Besides,sometimessellinggrainormeatishard,forthepricecouldbetoolow.

Sd:

Ithinkwe'dbetterdesignitlikethis:

Webuildabuildingofafewfloors.Ineachfloor,wecanraiseonekindofanimals.Withtheirwastes,wecanraisefishorgrowvegetablesonthetoporinthespacewhichfacesthesun.Wecanalsogrowmushroomsinthedarkplaces.Wecanuseonequarterofittodothisandbuildagardenononequartersothatpeoplecanenjoythemselveshere.Halfoftherestgrowflowerstosellandfortheotherhalfwecangrowgrassonitsothatourenvironmentwillbebetter.

Sa:

That'sagoodidea.Butitwillneedalotofmoneytodothis.Ihopewecanmakeadecisiontoday.

Se:

Wemustmakeadecision.MyopinionisthatwedoasSDsaid.Anyotheropinions?

SbandSc:

Iagreewithyou.

StepVI.SummaryandHomework

T:

Inthisclass,we'vetalkedabouttwostatisticalgraphsandlistenedtoapassage.Wehavealsotalkedabouthowtousealargepieceofland,usingsomeexpressionsofgivingadviceandmakingdecisions.Theseexpressionsare:

“…”（Pointingtotheblackboard.）Afterclass,chooseasubjectasyoulikewithyourpartnerandhaveadiscussion,usingtheexpressionsontheblackboard.That'sallfortoday.Classisover.

TheSecondPeriod

TeachingProcedures:

StepI.GreetingsandRevision

Greetthewholeclassasusual

T:

Attheendofthelastperiod,Iaskedeveryoneofustojoininadiscussion.NowI'llaskagrouptorepeatthediscussion.Whowillactitoutforus?

（Teacheraskstwogroupstorepeattheirdiscussionbeforetheclass.）

StepII.PreparationforReading

T:

Somuchforrevision.Let'slearnthenewwordsandexpressionstogether.Readthenewwordsandexpressionsofthisperiod,please.Beginwiththeword“modify”andendwiththeword“cackle”.

（Teacherandthestudentslearnthenewwordsandexpressionstogether.Teachercorrectsstudents'mistakesinpronunciationandgivessimpleexplanationsofsomewordsifnecessary.）

T:

Arethereanystudentscomingfromthecountrysideinourclass?

Ss:

Yes.Alotofusstudentsarefrompeasantfamily.

T:

Haveyoueverworkedinthefields?

S:

Yes.Ioftenworkinthefieldwithmyparents.Icandoalotoffarmwork.

T:

Haveyoueverheardofanythingaboutfarminginthepast?

Ss:

Yes,Ihave.

TNowturntoPage45.Let'sdopre-reading.Discussthequestions.Groupwork.Writeyouranswersonapieceofpaper.

（Afterafewminutes.）

T:

Areyouready?

（Ss:

Yes.）Whowouldtellussomethingabouttraditionalandmodernfarming?

SA:

Inthepast,farmersgrowcropsinthetraditionalway:

Usecattletoploughthefield;farmersworkinthefieldmostofthedayallyearround,buttheycouldnotproduceenoughfoodforthewholepopulation.Nowtheygrowcropsinthemodernway.Theyusemoderntechniquesintheirfields,suchaschemicalfertilizers,greenhousesandsoon.

T:

Whowouldanswerthesecondquestion?

SB:

I'lltry.Theadvantagesare:

chemicalfertilizers,electronicpumpsandother