人教版高中英语必修四-Unit-2-Working-the-land-全单元教案

Unit2WorkingthelandPeriodIIILearningaboutLanguageTeachinggoals教学目标1.Targetlanguage目标语言disturbing,expand,output,struggle,battles,grain,crops,decade,equip2.Abilitygoals能力目标EnableSstomastertheuseofthevocabularyandexpressions.3.Learningabilitygoals学能目标HelpSslearnhowtoenlargethewordsandstructures.Teachingimportantanddifficultpoints教学重难点Howtograspthewordsandphrasesandbeabletousethemfreely.Teachingmethods教学方法Showquestionsandfinishallthetasks.Teachingprocedures&ways教学过程与方法StepⅠFindthewordorphrasefromthetextforeachofthesemeanings.1.brown(skin)fromspendingtoomuchtimeinthesun2.tomakesomethingorsomebodyfreeof3.tobecomelargerinsize,numberoramount4.tomakeinformationandideasknowntomanypeople5.wouldpreferto6.totryextremelyhardtoachievesomething7.tosendthingstoforeigncountriesforsale8.pleasedbyhavingwhatonewantsorneeds9.toprovidewiththingsnecessaryforacertainpurpose10.plantsgrowninlargeamountsbyfarmers11.becauseofKeys:sunburnt,rid…of,expand,circulate,wouldrather,struggle,export,satisfiedwith,equip,crop,thankstoStepⅡFindwordsfromthepreviouspagesofthisunittoreplacetheunderlinedwords.Youmayneedtochangethewords’formstofit.1.AccordingtotheWHO’sinformation,about1.8millionpeopleacrosstheworlddieeachyearfromdiseasescausedbyunsafefoodandwater.2.Differentkindsofstrongcorn,anotherhybridgrain,hasbeendevelopedbyscientistsofmanydifferentraces.3.Nothavingenoughfoodleadstopoorhealthand,therefore,sickness.4.Over56percentofthepeopleinasmallSoutheastAsiancountryareinjobsrelatedtoagriculture.5.Withtheopenconditionsintoday’sinternationalbusinessworld,hybridgrainscanbesoldandsentabroadtocountriesaroundtheworld.Keys:statistics,globesuper,nationalitiesHunger,diseaseVietnam,occupationsfreedom,exportedStepⅢCompletethepassagewiththewordsbelowintheirproperforms.disturbingexpandoutputstrugglebattlesgraincropsdecadeequipInthepast_______,someofthefarmersinthewestofChinahavemetwithsomesuccessinthe_______againstthe__________desert._________withnewscientificfarmingmethods,theyhavebeenabletouselessfarmlandthaninthepast.Their_______of_____andother______,however,isstillthesame,whichmakesitpossibleforthemtousetheremainingfarmlandforplantingtrees.Theseandotherfarmersarestartingtowinsmall______inthetreatwaragainstthe________growthofthedesert.Keys:decade,struggle,expanding,Equipped,output,grain,crops,battles,disturbingUsingLanguageTeachinggoals教学目标1.Targetlanguage目标语言a.重点词语chemical,bacteria,pest,leadto,discovery,nutrition,keep…freefrom,rootb.重点句型Withthesediscoveries,somefarmerandmanycustomersarebeginningtoturntoorganicfarming.Overthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.2.Abilitygoals能力目标EnableSstomasterthemainideaofthetextandknowthewaysoforganizingarticles.3.Learningabilitygoals学能目标HelpSslearnhowtoenlargethewordsandstructuresofthesametopic.Teachingimportantanddifficultpoints教学重难点1.Howtograspthemainideaofthepassage.2.Howtograspthewordsandphrasesandbeabletousethemfreely.Teachingmethods教学方法Showquestions,readfast,findthemainideas,andthenreadcarefullyandfinishallthetasks.Teachingaids教学准备Arecorderandaprojector.Teachingprocedures&ways教学过程与方法StepⅠLookatthepictures.Whatisthesubstanceweputonthesoilwhichmakescropsgrow?Howmanykindsoffertilizersdofarmersuse?Whichkinddofarmersusewhentheyaredoingorganicfarming?Doyouknowaboutorganicfarming?StepⅡReading1.Scanthepassageandgetthemainidea.Chemicalfertilizerscancausemanyproblems,soorganicfarmingisbecomingmorepopular.2.Answerthefollowingquestionsafterreadthepassage.1)Whyarechemicalfertilizerssopopularinfarmingtoday?2)Whatproblemscanbecausedbyusingchemicalfertilizers?3)Whatisorganicfarming?4)Whatisthemainreasonforusingorganicfarmingmethods?Keys:1)Theyareagreatwaytostopcropdiseaseandincreaseproduction.2)Theycandamagethelandbykillinghelpfulbacteriaandpestsandbystayinginthegroundandundergroundwaterforalongtime.Theydamagepeople’shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.3)Organicfarmingmeansgrowingcropswithoutusinganychemicals.4)Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.3.Readthepassagecarefullyandfillintheblanks.ChemicalFarmingAdvantagesStoppingcropdiseaseandincrease__________ChemicalFarmingDisadvantagesDamagingtheland:Killingthehelpful______Damagingpeople’shealth:◆Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.◆Foodgrowstoofasttobefullofmuch________.Organicfarming____Togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealthOrganicfarmingMethods◆Using______wastefromanimalsasfertilizer◆Changing_________ineachfieldeveryfewyears◆Using_________ofsoiltoplantcrops◆Planting_____betweencropsStepⅢProjectPersuadefarmerstogrowthecropsbyorganicfarmingwiththeknowledgelearnt.Whatisorganicfarming?Whatfertilizershouldtheyuse?Why?Howtoplantthedifferentcrops?...StepⅣLanguagepoints1.Manyofthesechemicalscanleadtocancer...阅读下列句子,注意leadto的意思和用法。1)Hiscarelessnessledtotheaccident.2)Thistestisobviouslybadbecauseitleads toincorrectlearning.3)Toomuchworkandtoolittlerestoften leadstoillness.[自我归纳]leadto意为“_________________”,后多跟名词或代词。[联想]resultin引起(某种结果)、使获得(某种成果)、结果……如：Theaccidentresultedintwodeaths.resultfrom由……造成、因……而产生如：Sicknesssometimesresultsfromeatingtoomuch.[即学即练]用leadto的适当形式完成句子。1)Studentsshouldalwaysrememberthathardworkisthemainwaywhich_______success.2)Thebadweather_____aterribleaccidentafewdaysago.2.Theyfocusonkeepingtheirsoilrichandfreeofdisease.根据语境推断focus在下列句子中的含义,并从a-d中找出与每句话中的focus相符合的英文释义。1)Thefocusofthemeetingchangedfrompopulationgrowthtotheeducationofwomen.2)Bringtheobjectintofocusifyouwantaclearphotograph.3)Shetriedtofocushermindonherwork.4)SheturnedthecameraandfocusedonMartin’sface.a.thething,person,situation,etc.thatpeoplepayspecialattentiontob.apointordistanceatwhichtheoutlineofanobjectisclearlyseenbytheeyeorthroughalensc.topointacameraatsomething,andchangethecontrolsslightlysothatyoucanseethatthingclearlyd.togivespecialattentiontooneparticularpersonorthing,ortomakepeopledothisfocusn.焦点、中心点v.集中、聚焦focuson集中(注意力、精力等)于[翻译]1)Becauseofhisstrangeclothes,heimmediatelybecamethefocusof2)Focusyourcameraonthosetrees.3)I’msotiredthatIcan’tfocusonanythingtoday.3.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.keep…freefrom远离，避免keepfreefromemotionalreactions

避免激动的反应

keepfreefromrestrictions

避免受到限制4.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.[分析]①本句结构比较复杂。其主干结构为:主句(Cropsputimportantmineralsbackintothesoil)+状语(makingitreadyforcrops)。②状语中又包含“make+it+形容词”结构和由that引导的定语从句(thatneedrichandfertilesoil)。5.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.[分析]①本句的主干结构是一个简单句,其结构是:主语(farmers)+谓语(prefer)+并列宾语(planting...+leaving...)。②其中betweencrops和intheground作地点状语。③两个宾语后面又分别带有一个不定式作目的状语(topreventwindorwaterfromcarryingawaythesoil和tobecomeanaturalfertilizerforthenextyear’scrop)。StepⅤListening1.Whatisthemaintopicoftheconversation?Thepossiblebadeffectsofchemicalfertilizersonthefruitandvegetablesthatweeattoday.2.Listentothedialogueasecondtime.Decideifthefollowingstatementaretrueorfalse.1)PaulthinksthatCarrieisnottellinghimthetruth.2)Usingchemicalfertilizersalwaysmakesvegetablesemptyinside.3)Today’sfruitisnotashealthyforpeopleasfruitfiftyyearsago.4)Eatingmorevegetablesmightnotalwaysbegoodforus.5)Alloftoday’svegetableslookhealthybutinfactarenot.Keys:T,F,T,F,TStepⅥHomeworkWriteasummaryofthispassagefollowingtheprocedure.Step1:Skimthepassagetofinditsmainidea.Writeitdowninyourownwords.Step2:Findandunderlinethetopicsentenceofeachparagraph.Rewriteeachtopicsentence,usingyourownwords.Donotcopyfromthepassage!Step3:Writeyoursummary.Firstsatethemainideaofthepassageandthenthetopicscoveredbyeachparagraph.Remember,useyourownwords!SpeakingandWritingStepⅠMakingaDialogue(Pairwork)Situation:Youareafarmerandyourpartneristhecustomer,whodoesn’tknowmuchaboutthegreenfood.Youarepersuadingthecustomertobuyyour“greenfood”thatishealthyandsafebutmoreexpensive.FarmerCustomerIt’sbetterto…Thisisgoodvaluebecause…Theadvantagesare…It’smoreexpensivebut…You’lltastethedifferencewhen…It’sagreatpitythat…I’dprefer…because…Idon’tlike…because…IfIhaveachoiceI’llchoose…What’stheadvantageof…?I’drather…Forexample:Farmer:Goodmorning!Wouldyoulikesome…?Customer:Hmm…Theyarealittleexpensive!Whatistheadvantageof…?Farmer:Theadvantagesare…StepⅡTalkShowMarkispersuadingJoantohaveorganicfood.(Mark=M;Joan=J)M:Wouldyouliketohavesomeice-cream?I’vegotavarietyofflavorsforyoutochoosefrom.I’vegotstrawberry,peach,chocolate,coffeeandvanilla.J:Oh,no.Iamonadiet.Youknow,Iamputtingonweight.M:Butyoushouldnotbetoohardonyou.J:IfIhaveachoice,I’dchoosetohavegoodfoodbecauseIwanttoenjoyagoodlife.M:MayIsuggestyouhaveorganicfood?J:ItisapitythatIhavenoideaofit.Whatisorganicfood?M:Organicfoodisgenerallynamedfortheuncontaminated(未受污染的),safe, high-qualityandfull-of-nutrientsfood.J:Itsoundsinteresting.I’dpreferorganicfoodbecauseitishealthy.Buthowtoidentifyorganicfood?M:“GreenFood”labelisprintedonall thepackagesoforganicfood.J:Isitexpensive?M:It’smoreexpensivebutitisgoodfor yourhealth.J:OK,I’lltrytohavesomefromnowon.StepⅢGuid