人教版（2023）選擇性必修第一冊(cè)Unit 5Working the Land Using language Evaluate chemical farming and organic farming

第第頁人教版（2023）選擇性必修第一冊(cè)Unit5WorkingtheLandUsinglanguageEvaluatechemicalfarmingandorganicfarming2023新人教高中英語選擇性必修一Unit5UsingLanguage

Evaluatechemicalfarmingandorganicfarming公開課教案

Teachingaims:

Enablestudentstoknowthedifferencebetweenchemicalfarmingandorganicfarming.

Knowthestructureofanargumentativeessayandthewritingskillsofanargumentativeessay,suchasillustrating,givingexamplesormakingcontrasts.

Writeanargumentativeessayusingwhattheywilllearninthisperiod.

Teachingkeypoints:

Analysethedifferencebetweenchemicalfarmingandorganicfarming.

Analysethestructureandthewritingskillsoftheargumentativeessay.

Teachingdifficultpoints:

Analysethestructureandthewritingskillsoftheargumentativeessay.

Writeanargumentativeessayusingwhattheywilllearninthisperiod.

Teachingprocedures:

StepLead-in

Activity1Makingpredictions

(1)Lookatthetitleofthepassageandtrytoguesswhatwillbetalkedaboutinthepassage.

(2)Ifyouwereaskedtowritethepassageunderthistitle,whatisyourstructure

Suggestedanswers:

(1)Whatthetextwilltalkaboutwillinclude:thedefinitionsofbothkindsoffarmingandtheadvantagesanddisadvantagesofeach.

(2)Mystructuremaybelikethis:

Activity2Pictureguessing

Hereare6pictures.Trytofindoutwhichonesareaboutchemicalfarmingandwhichareorganicaccordingtoyourbackgroundknowledge.

Suggestedanswers:

Picture1organicfarming;Picture2chemicalfarming;Picture3organicfarming;Picture4organicfarming;Picture5organicfarming;Picture6chemicalfarming.

StepⅡTestourpredictions

Readthetextquicklyandsilentlyandtrytofindwhatisthemainideaofeachparagraph.Andthendrawthemapofthestructure.

Para.1_____________________________________________

Para.2_____________________________________________

Para.3_____________________________________________

Para.4_____________________________________________

Para.5_____________________________________________

Suggestedanswers:

Para.1Chemicalfarminghelpsfightcropdiseaseandincreaseproduction.(advantage)

Para.2Threedisadvantagesofchemicalfarming.(disadvantages)

Para.3Thedefinitionoforganicfarmingandoneofitsadvantages.(advantage)

Para.4Otherdifferentmethodsoforganicfarmingandtheiradvantages.(advantages)

Para.5Thedisadvantageoforganicfarmingandshowtheattitudeofthewritertothereaders.(disadvantagegreatereffortrequiredtofarm.

(2)Ilikeorganicfarming.Becauseorganicfoodismoredeliciousandmorehealthy.

StepⅤWriting

Writeanargumentativeessaygivingyouropiniononchemicalororganicfarming.

Activity1Completetheoutlinebelow.（紅色部分為學(xué)生填寫部分）

Topicsentence:Inmyopinion,__________farmingispreferableto__________farmingbecause___________

Point1:Chemicalfarmingharmstheenvironment.

(Detail):Chemicalpesticidesarenotfoundinnature,andnormalnaturalprocessescannotgetridofthem.

Point2：Chemicalfarmingharmsuspeople.

(Detail):Weendupeatingplants,diaryproducts,eggs,andmeatthathavehighlevelsofpesticides.

Point3:Organicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicals.

(Detail):Chemicalsarecommonlyusedinfarmingtogrowlargercropsmorequickly.

Conclusion:Iwouldliketosuggestbuyingorganicfood.

Suggestedanswers:

Topicsentence:Inmyopinion,organicfarmingispreferabletochemicalfarmingbecausechemicalfarmingdoesharmtonotonlytheenvironmentbutalsopeopleandbecausechemicalfoodhaslessnutritionwhileorganicfoodismorenutritious.

Activity2Useyouroutlinetowriteashortessaygivingyouropiniononthetopic,payingattentiontousingrighttransitionalwords.

Activity3Exchangeyourdraftswithanotherpair.Usethischecklisttogivethemhelpfulfeedback.

√Doesthewriterdoagoodjobofexpressinghis/heropinion

√Doeseachparagraphhaveonemainidea

√Doeseachparagraphhaveatleastonedetailtosupportitsmainidea

√Doesthewritersequencethepointsinlogicalorder

√Doesthewriterdoagoodjobpersuadingyoutoaccepthis/heropinion

Activity4Polishyourdraftandshareitwithyourpartner.

Suggestedanswer:

Inmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebenefitstotheenvironmentandpeople,andbecauseorganicfoodismorenutritious.

Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,andnormalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.

Thisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”.Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.Whileitmaybetruethatthefoodweeatdoesnothaveenoughpesticideinittokillusimmediately,overtheyearsthispesticidemaycauseushealthproblemsorgiveusdiseasessuchascancer.

Finally,organicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicals.Therewasthecaseofwatermelonsliterallyexplodinginthefieldsbecausetheyhadbeengivenchemicalstomakethemgrowfaster.Thereasonwhytheyexplodedwasthattheycontainedtoomuchwater,becausethefarmershadusedtoomanychemicals