Unit5UsingLanguageWriting課件高中英語人教版選擇性2

EvaluatechemicalfarmingandorganicfarmingBook4Unit5UsinglanguageWarmingupandlead-inDoyouwanttohavealandofyourown?FreetalkWhatwillyougrowifyouhavealand?Warmingupandlead-inWhatwillyougrowifyouhavealand?FreetalkDoyouwanttohavealandofyourown?Warmingupandlead-inWhatwillyougrowifyouhavealand?FreetalkDoyouwanttohavealandofyourown?Whatisthesubstanceweputonthesoiltomakecropsgrow?chemicalfertilizersnaturalfertilizersWarmingupandlead-inWhatarethey?Doyouknowthedifference?FreetalkchemicalfertilizersnaturalfertilizersChemicalfarming

farmingusingchemicalpesticidesandartificialfertilizers.Organicfarmingsimplyfarmingwithoutusinganychemicals.Warmingupandlead-inWhatarethey?Doyouknowthedifference?FreetalkchemicalfertilizersnaturalfertilizersChemicalfarming

farmingusingchemicalpesticidesandartificialfertilizers.Organicfarmingsimplyfarmingwithoutusinganychemicals.ArgumentativeWritingWriteanargumentativeessaygivingyouropiniononchemicalororganicfarming.WritingtargetArgumentativewritingistoexpresstheauthor'sopinionsthrougharguingorreasoning.Theauthorwhoholdsaviewonacertainissueshouldputforwardseveralreasonsandsupportingevidencetopersuadeothersinordertomakereadersagreewiththeirownviews.Towritewell,weneedpayattentionto..1.Thetopic(論點)2.Argument(論據(jù))3.Demonstration(論證)ArgumentativeWritingPre-readingPredictionVersusprep./?v??s?s/表示兩隊或雙方對陣）對，訴，對抗1.Whatdoesthepictureshow?2.Whatwillbethetextabout?Pre-readingPrediction1.Whatdoesthepictureshow?2.Whatwillbethetextabout?Thefirstpictureshowsapersonisusingpesticidewhilethesecondisfulloffreshfruit.Theyeachrepresentchemicalandorganicfarming.Pre-readingPrediction1.Whatdoesthepictureshow?2.Whatwillbethetextabout?Perhapsitwillbeaboutchemicalfarmingandorganicfarming.ShortlybeforereadingExpectationWhatdoyoualreadyknow?Whatareyoueagertoknow?Whathaveyoulearnt?ShortlybeforereadingExpectationWhatdoyoualreadyknow?Whatareyoueagertoknow?Whathaveyoulearnt?ShortlybeforereadingExpectationWhatdoyoualreadyknow?Whatareyoueagertoknow?ShortlybeforereadingExpectationWhatdoyoualreadyknow?1.Chemicalfarmingiseconomical.2.Organicfoodisperhapshealthier.……3.Organicfoodismoreexpensive.4.Chemicalfarmingmightpolluteourenvironment.5.AnimalsmightbeindangerbecauseoftheuseofChemicalpesticide.6.Wecan’tstopusingchemicalsinfarmingcompletelynow.ShortlybeforereadingExpectationWhatdoyoualreadyknow?Whatareyoueagertoknow?c1.Whatisauthor’sattitudetowardsit?2.Whyischemicalfarmingnothealthy?….3.Whatisorganicfarming?4.Whichwayofgrowingfoodtastesbetter?5.Whataretheadvantagesoforganicfarming?6.Canorganicfarmingreplacechemicals?While-readingThetopicWhatisauthor’sattitudetowardsthetopic?Howdoyouknow?Findyourevidence.cIdentifyauthor’sopinionUsually,authorsexpresstheirattitudetowardsthetopicatthebeginningofthearticleandechotheiropinionsattheendofthearticle.While-readingThetopicWhatisauthor’sattitudetowardsthetopic?Howdoyouknow?Findyourevidence.Theauthorisagainstchemicalfarmingandworriedthatthelong-termuseofchemicalsmightharmthelandandpeople’shealth.While-readingThetopicWhatisauthor’sattitudetowardsthetopic?Howdoyouknow?Findyourevidence.

Theauthorisagainstchemicalfarmingandworriedthatthelong-termuseofchemicalsmightharmthelandandpeople’shealth.

Theauthorisworriedandhopesonedaypeoplecaneathealthierfoodtheenvironmentcanbecomebetter.While-readingArgumentThink:Howwillauthorexpresshisarguments?TheproblemswithchemicalfarmingWhatisorganicfarming?TheCharacteristicsoforganicfarmingWhile-readingArgumentTheproblemswithchemicalfarmingWhatisorganicfarming?1.Long-termuseofchemicalpesticidesandartificialfertilizerscanharmthelandandpeople’shealth.2.Pesticidescankillhelpfulbacteriaandinsects.3.Cropsgrownwithchemicalfertilisersusuallygrowtoofasttoberichinnutrition.Inwhichparagraphdidyoufindallthedetails?Para.1&2TheCharacteristicsoforganicfarmingWhile-readingArgumentTheproblemswithchemicalfarmingWhatisorganicfarming?TheCharacteristicsoforganicfarmingOrganicfarmingissimplyfarmingwithoutusinganychemicals.While-readingDemonstrationTheproblemswithchemicalfarmingWhatisorganicfarming?TheCharacteristicsoforganicfarmingOrganicfarmingissimplyfarmingwithoutusinganychemicals.1.Organicfarmersfarmthroughnaturalmeans.Manyusenaturalwastefromanimalsasfertilizers.2.Theyusemanymethodstoproducerichsoil.Theychangethekindofcropgrownineachfieldeveryyear.Theyplantdiversecropsthatusedifferentdepthsofsoil.Why?Becausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Why?Becauseitcangrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.While-readingThefutureWhatisthefutureofmodernfarming?Willwecompletelystopchemicalfarming?While-readingThefutureWhatisthefutureofmodernfarming?Willorganicfarmingreplacechemicalfarming?While-readingThefutureWhatisthefutureofmodernfarming?Orwillorganicfarmingchemicalfarmingcoexist?While-readingThefutureWhatisthefutureofmodernfarming?Willman-madechemicalsbestillusedinfarming?Yes.Becausechemicalfarmingserveshighdemandforfoodaroundtheworldwhichorganicfarmingcannotprovideenoughforus.While-readingThefutureWhatisthefutureofmodernfarming?Willman-madechemicalsbestillusedinfarming?Yes.Becausechemicalfarmingserveshighdemandforfoodaroundtheworldwhichorganicfarmingcannotprovideenoughforus.Thereisstillalongwaytofindasolutionthatcanprovidesufficientfoodforuswhilekeepingbothpeopleandenvironmenthealthy!Post-readingSummary1.Summarizethemainideaofeachpart.WhatorganicfarmingisOrganicmethodsforproducingrichsoilTheproblemswithchemicalfarmingWhyman-madechemicalsarestillusedinfarmingPost-readingSummary2.Fillinthetableaccordingtothepassage.FarmingBenefitProblemSolutionChemicalfarmingOrganicfarmingfightcropdiseaseandincreaseproductionsometimesharmboththelandandpeople’shealthswitchtoorganicfarmingmakethesoilrich;keeptheair,soil,waterandcropsfreeofchemicalscannotmeettheneedstillalongwaytofindasuitablesolutionBefore-writingGroupworkDiscussthefollowingtwoquestionswithyourgroupmembers.1.Whatotherdisadvantagesofchemicalfarmingdidauthornotlist?2.Whatotherdisadvantagesoforganicfarmingcanyouthinkof?While-writingGroupworkDecidewhetheryourgroupsupportschemicalfarmingororganicfarming.Theuseyouroutlinetowriteashortessaygivingyouropiniononthetopic.Topicsentence:Inmyopinion,_______farmingispreferableto____________farmingbecause___________________Point1:_________________________________________（Detail）_________________________________Point2:_________________________________________（Detail）_________________________________Point3:_________________________________________

（Detail）_________________________________Conclusion:______________________________________明確體裁話題支持有機農(nóng)業(yè)文體：議論文確定時態(tài)人稱以現(xiàn)在時為主、兼顧過去時、將來時；第一、三人稱布局文章結構開頭：介紹農(nóng)業(yè)發(fā)展概況和有機農(nóng)業(yè)的出現(xiàn)。展開論述：分層次介紹化學農(nóng)業(yè)和有機農(nóng)業(yè)的區(qū)別，有機農(nóng)業(yè)的優(yōu)勢。結尾：總結觀點，提出建議。列出核心要點1.化學農(nóng)業(yè)的缺點。2.有機農(nóng)業(yè)的優(yōu)點，人們對健康的重視和選擇有機農(nóng)業(yè)的理由。

明確體裁話題確定時態(tài)人稱

布局文章架構

列出核心要點

Writeanargumentativeessay.開頭：介紹農(nóng)業(yè)發(fā)展概況和有機農(nóng)業(yè)的出現(xiàn)。展開論述：分層次介紹化學農(nóng)業(yè)和有機農(nóng)業(yè)的區(qū)別，有機農(nóng)業(yè)的優(yōu)勢。結尾：總結觀點，提出建議。支持有機農(nóng)業(yè)文體：議論文以現(xiàn)在時為主、兼顧過去時、將來時；第一、三人稱1.化學農(nóng)業(yè)的缺點。2.有機農(nóng)業(yè)的優(yōu)點，人們對健康的重視和選擇有機農(nóng)業(yè)的理由。After-writingCheckingLetgroupmembersreviewthedraftaccordingtothechecklist.Doesthegroupmemberdoagoodjobofexpressingyouropinion?Doeseachparagraphhaveonemainidea.Doeseachparagraphhaveatleastonedetailtosupportthemainidea?Doesthegroupmembersequencethepointsinalogicalorder?Doesthegroupmemberdoagoodjobpersuadingyoutoaccepthis/heropinion?After-writingPresentationInviteonegroupmembertopresentyourspeech.ApossibleversionSample

Inmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebenefitstotheenvironmentastopeople,andbecauseorganicfoodismorenutritious. Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,normalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.Thisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”,thatis,tokillinsects. Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.While