chemical-or-organic-farming-教案

ChemicalorOrganicFarming?(Reading)Teachingaims:1．Developstudentsreadingskillsbyskimmingformainideasandscanningfordetails.2．Havestudentslearnandtalkaboutdisadvantagesofchemicalfarmingandadvantagesoforganicfarming.3．Mastersomekeywordsandphrases:chemical,organic,buildup,leadto,keep…freefrom,focuson,production,causedamageto.Importantanddifferentteachingpoints:1.Enablestudentstolearntousestrategiessuchasskimming,scanning,andsoontodotheirreading.2.Tounderstandthemainideasbygraspingsomeimportantinformation.Teachingaids:Amultimediaproject,colourchalks,text,workbook.Teachingprocedure:StepⅠ.Leadin1.Selfintroduction:Goodmorning,students,mynameisLiOu,youcancallmeMrs.LiorTeacherLi.Hopewecanhaveagoodtimeinthisclass.Today,wearegoingtolearnmoreaboutunit2–workingtheland.2.Askstudent:①DoyouplayQQfarming?Doyouknowhowtoplayit?Answers:First,weneedtobuyorselecttheseedsfromthestore.Second,weneedtoploworturnoverthesoil.Third,wesowtheseedsinthesoil.Finally,wecanharvestourgrain.②Inordertoincreaseproductionofthecrops,weneedtowaterthecrop,ridthesoiloftheweed,andkilloffthepest.Tips:increaseproduction–reduceproduction–unproductiveT:Sometimes,wealsousethisonetofertilizethesoil.Whatisit?S:Itisfertilizer.T:Howmanykindsoffertilizersdoyouknow?S:Therearetwokinds.Theyarechemical＆naturalfertilizers.StepⅡ.PresentationItischemicalfarmingbyusingchemicalfertilizersanditisorganicfarmingbyusingnaturalfertilizers.Whichoneisbetter,chemicalororganicfarming?Todaywe’llknowitafterlearningthereading,openthebookandturntopage14.StepⅢ.Reading1.SkimmingSkimtofindthemainideaforeachparagraph.Para1.EffectsofchemicalfertilizerPara2.Problemscausedbychemicalfertilizers.Para3.Farmersandcustomersturntoorganicfarming.Para4.Othermethodstokeepthesoilfertile.2.Scanning1.Whyarechemicalfertilizerssopopularinfarmingtoday?B(Para1)A.Becausetheyareexpensive.B.Theyareagreatwaytostopcropdiseaseandincreaseproduction.C.Theycancausedamagetotheland.D.Theyarebenefitforpeople’shealth.2.Whatproblemscanbecausebyusingchemicalfertilizers?(Para2)Answer:First,theycandamage_thelandbykilling_thehelpfulbacteriaandpests.Theyalso_stay_intheground,buildup_inpeople’sbodiesand_leadto_cancerorotherillnesses.Inaddition,itusuallygrowstoofasttobefullofnutrition.Tips:buildup–①Anewgovernmenttakestimetobuildup.②Takingexercisehelpsusbuildupourbody.Leadto--①AllroadsleadtoRome.②hardworkisthemainwaywhichleadstosuccess.3.readPara3＆Para4①Whatisorganicfarming?Answer:Organicfarmingisfarmingwithoutusinganychemicals.②Whataretheadvantagesoforganicfarming?Answer:Thefarmersfocusonkeepingtheirsoilrich,reducingdiseaseandkeepingtheair,soil,waterandcropsfreefromchemicals.Tips:focuson:Youshouldstopfocusingonplayingcomputersandyoureallyhadtofocusonyourstudy.keep…freefrom:Exercisecankeepusfreefromdisease.TheUnitedNationistryingtokeeptheworldfreefromthethreatofwar.③Whatarethemethodstokeepthesoilfertile?usingnaturalwastefromanimalsasfertilizer.changingthekindofcropineachfield.plantingcropstousedifferentlevelsofsoil.plantinggrassbetweencropstoprevent…StepⅣ.SummeryInrecentdays,scientistshavediscoveredthatusing________fertilizersforalongtimecan_________________thelandandalsopeople'shealth.Thereareseveral__________causedbychemicalfertilizers.Theydamagetheland,stayinthewaterforalongtimewhichcan___________inpeople’sbodiesand____________manyillnesses.Withthese___________,________farmingisbecomingmorepopularwithsomefarmers.Theydon’tuseanychemicalsand_________keepingthesoilrich.Thisalso__________theairandcrops___________chemicals.Therearemanyorganicfarming_________formakingthelandhealthyandproductive.Allofthesemethodstrytoproducegoodfoodandtokeeptheenvironmentandpeople’shealth.Answers:chemical;causedamageto;problems;buildup;leadto;organic;focuson;keep…freefrom;methodsStepⅤ.Writing--PlasticorClothbags?Thefollowingwordsmayhelpyou.Overthepasthalfcentury,…havebecomeverycommon….…welcomedthemasa…wayto…Recently,however,wehavebeenfindingthattheycancausedamageto…,Focuson;leadto;problem;keep…freefrom;method;organic;chemical;causedamageto;buildup;discoveryeven…,topeople’shealth.Whataresomeoftheproblemscausedby…?First,…,theyalso….Inaddition,…Withthesediscoveries,…arebeginningtoturnto…….StepⅥ.Homework1.Readthepassagemorecarefullyafterclass,andunderlinesomeusefullanguagepoints.2.FinishthewritingStepⅦ.Thedesignoftheblackboard.Chemicalororganicfarming?Chemicalfarming:Para1.effects:1.stopdisease2.increaseproductionPara2Problems:1.first2.also3.inadditionOrganicfarming:Para3Advantages:1.withoutchemicals2.keepthesoilrich3.reducedisease4.keep…freefromchemicalsPara4Methods:1.usenaturalwaste2.changecrops3.plantcropsindifferentlayers4.plantgrassbetweencrops