unit 19 modern agriculture 第二课时教案

1 / 8 Unit 19 Modern agriculture 第二课时教案 Unit19modernagriculture 第二课时教案 : Talkaboutmodernagricultureanditseffectsonpeople slife learnhowtogivesomebodyadviceandmakedecisions. Similardialoguepresentationwithnewwordsandexpressionsusedwithin :taperecorder,pictures,slides Step1Pre-reading modernfarmingandtraditionalfarming-letSsfindouttheadvantagesanddisadvantagesofeachwaysandfillinthetable. (slideshow) Raisingchickens SmallscaleLargescale 2 / 8 Horsepower Animals(buffalo;alsoox)machines(tractor) climatecontrol openairGreenhouse :GetSsworkinpairanddiscussthequestion-whatotherchangeshavehappenedonfarmsinthelast100years? :“Withthedevelopmentofthenewtechnique,randtheycanuseadvancedmachinestoirrigateorcultivatethefarmland.” T:“What sthetitleofthereadingpassage?” Ss:“modernagriculture” T:“Whatdoesitmeaninchinese?” Ss:“ 现代农业 ” T:“Howtosay 传统农业 inEnglish?” Ss:“traditionalagriculture.” T:“canyouimaginewhattraditionalagricultureislike?” 3 / 8 Ss: letSsreadthetextfirstlyandanswerthefollowingquestions: Howmuchlandcanbeusedforfaminginchina? (Sevenpercentoftheland.) Whatistheadvantageanddisadvantageofchemicalfertilization? () Whatisthebiggestproblemofchinesefarmers? (Theshortageofarableland.) letSsreadthepassageforthesecondtimeandanswertwoquestions: Whatdoes“Gm”standfor? (“G”standsfor“genetically”fromtheword“genes”.“m”standsfor“modified”,whichmeans“changed”.) Whatistheadvantageoftomatoeswhichwereusingtechnique4 / 8 knownas“Gm”? () letSsreadthepassageandfillinthetable:(slideshow) 1950s-1980s1980s-present Theuseofelectricpumpsforirrigation Theuseofchemicalfertilizers Theuseofinsectkillers TheuseofspecialseedbedsTheuseofgreenhouses Tomakevegetablesbiggerorbetter Tochangevegetablessotheycangrowonpoorsoil knowledgefromabroad InnovationsProblemsAdvantages chemicalfertilisersShortageofarablelandBiggerandbettercrops PumpsforirrigationWeatherconditionsBiggerandbettercrops SpecialseedbedsShortageofarablelandmorecropsinoneyear (notinthetext)Biggercropsonmorelandbyfewerhands InternationalexchangeLackofknowledgeLearnfromotherp5 / 8 eople GreenhousesWeatherconditionBiggerandbettercrops Greenhouses(rootsinwatertanks)Shortageofarablelandmorecropsinoneyear Gmtechnique(cangrowinpoorsoil)Shortageofarablelandcangrowinpoorsoil;bigger&healthier;lesstimetoripe LetSslistentothetapeandfollowit. letSsworkingroupsandimaginewhatotherchangeshavehappenedonfarmsinthelast100years. letSsdiscussionthefollowingquestions Atthebeginningofthepassage,whydoesthewritersay“Itisonthearablelandthatthe farmersproducefoodforthewholepopulationofchina”? Whatdoesthewriterwanttotellusbysaying,“Notonlyfoodproductionisimportantbut alsotakingcareoftheenvironment.”? Whatcanweinferfromthesentence“InchinaaboutonehundredresearchstationsarenowdoingGmresearchtomakebetter6 / 8 tomatoes,cotton?” Whatcanyouimagineaboutthefutureoffoodproduction? StepIVPost-reading ,page46,Exercise1-2 ,teachercangetSsreadanewtextinWorkbook,page111,andfinishalltheexercises. ,whichareimportantinthetext. : compareto/with Forthousandsofyears makeuseof Beharmfulto Dependon Aswellas NotonlybutalsoProtectfrom Nomatterhow Bedifferentfrom Standfor Inotherwords Thewaytomatoesgrowfroma naturalseedis 7 / 8 changed Avarietyofovertheyears Haveaneffecton makegoodmoney makeuseof Inthe1980s Goagainst Homework FinishofftheexerciseontheWorkbook. 教案点评： 根据新教材中的以阅读为主的教学环节所设计的一课时 /两课时教案。本课阅读课的目的是让学生通过阅读英语材料，掌 握实验步骤，领悟严谨的科学精神财富，体验英语语言、问题，学习灵活使用语言结构。 这 个 教 学 过 程 主 要 分 四 个 教 学 步 骤 ：pre-reading,reading,post-reading,languagepoints。 pre-reading：在阅读课文之前，教师可适当的讲解与本单元有关的背景知识 ,运用图片向学生介绍传统农业与现代农业的差异，通过提问的方式引入课文主题。教师可根据课文的内容和篇章结构，从不同的角度，引导学生对课文内容进行预测和讨论。 reading：课文分三个步骤：掠读（ skimming），即带着8 / 8 某个问题进行搜索式阅读，这样能培养学生捕捉关键句的能力；略读 (skipping)，即教师指导学生通读全文，理解课文大意，培养学生发现文章或段落的主题句