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1、一师一优课一课一名师课堂教学设计晒课模板设计教师：刘燕 任教学校：务川第三小学 设计时间：2015-4-15教材版本人教版课 题面积单位间的进率年 级三年级课 时1一、教学目标1.知识与技能(1)使学生进一步熟悉面积单位的大小，掌握面积单位间的进率。（2）培养学生观察比较分析问题的能力，逐步养成积极思考的学习习惯，能准确地进行常用面积单位之间的改写。2.过程与方法自主学习 合作学习3.情感态度与价值观逐步养成积极思考的学习习惯，能准确地进行常用面积单位之间的改写。二、学情分析whilethelawnisstillinagreatstageoflifeactivi
2、ties,comparedwiththeprevioustwoperiods,lawnwaterrequirementsincreaseatthisstage,ifnottimelyirrigation,notonlyaffectthegrowthofgrass,alsocausesyellow.Atthisstage,accordingto4-5ofirrigation.Inshort,grasstypes,waterrequirementsaredifferent,youmustAccordingtotheclimateconditionsandplantspecie
3、stodetermineirrigationofthelawn.Aboutaday,whenirrigationisbetterdependsonirrigation.Intheory,thesameperiodaslongastheamountofirrigationwaterislessthantheinfiltrationcapacityofthesoil,irrigationallthetimeinaday.Thendependsontheirrigationway.Ifintermittentintermittentsprayorsprayirrigation(
4、highdegreeofatomization),irrigationisbestwiththeSun.Notonlycanaddmoisture,butalsosignificantlyimprovethemicroclimateandphotosynthesisandtranspirationandgasexchange,facilitatedthecoordinationofwater,air,fertilizerandsoilthermalandvegetativeorgansofrootandrootexpansion,andcouldleadtheentire
5、transitstorageoftheplantmaterial,breathing,lawnsandlush.Ifusingwater,irrigation,andsoon,shouldbewatchingseason,earlyspring,lateautumnaroundtheheelaswellandtheresttaketwilightasmuch.(2)irrigationirrigationquantityshouldbebasedonthesoil,growing,grassandotherfactorstodetermine.Generallawngro
6、wingseasondroughtperiod,takesaboutaweektopay20-40mm;vigorouslygrowinglawnintheheatandseveredroughtsituations,needtopay50-60mmperweekormore.InGeneral,regardlessofthemethod,shouldbeirrigatedmorethanonce,eachtimelesswater,maximumsurfacerunoffthatjustoccurred.2,fertilizingtomaintainlawndarkgr
7、eenleaves,grows,portionsmustbefertilized.Lawnplantsforleafgrowthandblossom-freerequirements,sonitrogenismoreimportant,responsetonitrogenfertilizeristhemostobvious.Shouldbebasicapplication由于学生在以往生活、学习中较频繁接触周长等一些进率为10的单位，受相邻长度单位进率为10的影响，学生容易产生相邻单位进率都是10的错误迁移。再加上三年级学生思
