高中英语人教新课标必修4教案：Unit 2 Working the land Period 3 Extensive Reading

Period3　ExtensiveReadingTheGeneralIdeaofThisPeriodThisperiodisaboutthereadingofthepassages:Organicfarming.Itcanhelpthestudentslearnsomethingmoreaboutthemodernagriculture.TeachingImportantPointsHelpthestudentstounderstandthepassagesandrealizetheimportanceoforganicfarming.TeachingDifficultiesHowtoimprovethestudents’readingability.Howtohelpthestudentsunderstandtheadvantagesoforganicfarming.TeachingMethodsAsking-and-answeringactivitytocheckthestudents’understandingofthetext;individual,pairorgroupworktofinisheachtask.TeachingAidsAtaperecorderAmulti-mediacomputerandablackboardThreeDimensionalTeachingAimsKnowledgeandSkillsTrainthestudents’readingability.Learnsomeusefulwordsanddrill.Enablethestudentstoknowthedifferencesbetweenorganicfarmingandchemicalfarming.ProcessandStrategiesPairworktotalkabouttheadvantagesoforganicfarming.Individualworktofinisheachtask.FeelingsandValueThroughthereadingofthispassagethestudentsmayhaveabetterunderstandingoftheadvantagesoforganicfarming.Itisimportantaspeoplearemoreandmoreconcernedaboutthequalityofthefoodweeat.TeachingProceduresStep1Warmingup1.Greetings2.Checktheanswersoftheexercisesaboutthe-ingformasthesubjectandobject.Step2ReadingforstructureT:IntheReadingpartwelearntsomethingaboutplantingrice,butdoyouknowwhatisthebestwaytoplantrice?Ss:...T:Todaywe’lllearnapassageaboutorganicfarming.Nowpleasereadthetextandtrytofindoutthemainideaofeachparagraph.I’llgiveyoufiveminutes.(fiveminuteslater)T:WhowouldliketotellmethemainideaofParagraphOne?S:It’s“Whatis‘organicfarming’?”T:That’sright.HowaboutParagraphTwo?S:Themainideais“Thefertilizerthatorganicfarmerspreferisnaturalwastefromanimals”.T:Thankyouforyourgoodanswers.Let’scometothenextparagraph.S:Themainideaforthelastparagraphis“Organicfarmerschangecropseverytwoorthreeyears”.T:Everyonehasdoneagoodjob,Ihopeeveryonegotalltheanswersbyyourself.Step3ReadingfordetailsT:Nowpleasereadthepassageagain,andtrytofindalltheanswersforthefollowingquestions:,1.Whatisorganicfarming?2.Whatproblemsarecausedbyusingchemicalfertilizers?3.Whydoorganicfarmersgrowpeasorsoybeansaftercornorwheat?T:Finish?Anyonegetstheanswerforthequestions?Suggestedanswers:1.Organicfarmingmeansgrowingcropswithoutchemicalfertilizers.2.Therearethreeproblems.First,chemicalfertilizersaffectthesoilandthewatersupplybadly.Second,theyallowfarmerstogrowthesamecropyearafteryearandexhaustthesoil.Third,theykillbothhelpfulandharmfulpests.3.Farmersgrowpeasorsoybeansaftercornorwheatsothatpeasandbeanscanputmineralsbackintothesoil,makingitrichandhealthyandreadytogrowmorewheatorcorn.Step4ExtensiveReadingT:Pleasereadthetextforthethirdtime,thenfillinthefollowingtable.(Fiveminuteslatertheteacherchecktheanswersonebyone.)AdvantagesoforganicfarmingReason1.Farmersusenaturalwastefromanimals.1.Thismakesthesoilricherinmineralsandsomorefertile.2.Thesoilisnotexhausted.2.Peasandsoybeansrenewthemineralsinthesoilanditbecomesrichandhealthy.3.Theyusethesoiltobestadvantage.3.Theyplantcropsthatneedsurfacesoilandnextcropsthatgrowatadeeperlevel.Sothewindandwaterdoesn’tcarryawaythesoil.Alltherichnessofthesoilisused.Step5RetellingT:Nowpleaseretellthetextaccordingtothefollowingchart,youcandiscussingroups.Organicfarming1.Cropsgrowingwithnaturalfertilizers.2.Farmersprefernaturalwastefromanimals.①make...richerandmorefertile　　①leaving...isnotgood②reduce...andhelp...strong　　　②grow...yearafteryear③thefertilizerskill...andhealthy④keepfree...fromchemicals(Threeminuteslater,theteacherasksomestudentstohaveatry)Step6LanguagepointsTeacherexplainstheimportantwordsandexpressionsfromthereading.Trytouseasmanyexamplesaspossibletoillustratethepoint.Afterillustration,teachercangivestudentssomeexercisetoconsolidatetheirunderstanding.Step7SummaryandHomeworkT:Todaywelearnedapassageaboutorganicfarming.Ifyouareinterestedinit,youmayfindmoreinformationaboutitontheInternetafterclass.What’smore,youshouldfinishyourworkbookexercises.Somuchfortoday!TheDesignoftheWritingontheBlackboardUnit3WorkingthelandPeriod3　Extensivereading1.reduce　v.makesth.smallerinsize,number,degree,price,etc.e.g.Thecompanytriestoincreaseprofitsbyreducingcosts.Wehavereducedexpensesthisyear.2.supply　v.givesb.sth.thatisneededoruseful,e.g.HekeptmewellsuppliedwithcupsofcoffeewhileIwrotethereport.Theshopwasunabletosupplywhatshewanted.3.referto　v.mentionorspeakofsb./sth.e.g.WhenIsaidsomepeoplewereverystupid,Iwasn’treferringtoyou.Don’trefertothismatteragain.RecordafterTeachingActivitiesandResearchTheteachermayencouragethestudentswhoareinterestedinorganicfarmingtofindmoreinformationaboutitandshareitwithotherstudentsinclass.ReferenceforTeachingLanguagePoints1.reducev.makesth.smallerinsize,number,degree,price,etc.e.g.Thecompanytriestoincreaseprofitsbyreducingcosts公司尽力通过减少花销来提高利润。Wehavereducedexpensesthisyear.今年我们已经减少了业务开支。　　2.supplyv.givesb.sth.thatisneededorusefule.g.HekeptmewellsuppliedwithcupsofcoffeewhileIwrotethereport.当我写报告时,他不断地给我提供咖啡。Theshopwasunabletosupplywhatshewanted.在这家商店她买不到她所想买的东西。3.refertov.mentionorspeakofsb./sth.e.g.WhenIsaidsomepeoplewereverystupid,Iwasn’treferringtoyou.当我说有些人是很愚蠢的时候,我不是说你。Don’trefertothismatteragain.别再提这件事了。SentencesandstructuresFindoutallthesentenceswith“v.+ing”forms,andtrytorememberthem.Translatethefollowingsentences,andtellwhatpartofspeechestheredpartsareusedas.1.它也指用自然肥料而不是化肥种植的庄稼。Italsoreferstocropsgrowingwithnaturalratherthanchemicalfertilizers.注:growing...在句中充当定语。修饰crops。2.他们说,把这种肥料施在农田里会使土壤含有更丰富的矿物质,而（土壤）也会更加肥沃。Puttingthisintheirfields,theyargue,makesthesoilricherinmineralsandsomorefertile.注:Putting...在句中充当状语。3.这一点很重要,因为土壤改良了,农作物的病虫害就减少了,因而有助于农作物的茁壮成长。Thisisimportantbecausedevelopingahealthysoilreducesdiseasesincropsandhelpsthemgrowstrongandhealthy.注:developing...在句中充当主语。4.然而使用化肥会带来很大的问题。However,usingchemicalfertilizersisabigproblem.5.第一,在田地里长期遗留化学物质对土壤和水源不利。,Firstly,leavingchemicalsinthegroundforalongtimeisnotgoodforthesoilorthewatersupply.注:leaving...在句中充当主语。6.不同的是,有机耕作的农民们坚持每隔两三年换种农作物。Instead,organicfarminginsistonchangingcropseverytwoorthreeyear.注:changing...在句中充当宾语。7.这些农作物将矿物质带回土壤,使之肥沃强效,适宜于种植要求土壤肥沃的农作物,例如玉米和小麦。Theseputthemineralsbackintothesoil,makingitrichandhealthyandreadytogrowcropsthatneedrichandfertilesoillikecornorwheat.注:making...在句中充当状语。8.但无论他们种什么,他们确保在收割后留在地里的东西成为来年农作物的天然肥料。Butwhatevertheygrowtheymakesurethatwhatisleftinthegroundafterharvestingbecomesanaturalfertilizerforthenextyear’scrops.注:harvesting...在句中跟after一起充当时间状语。