二下数学教案4单元.doc

课题 Count numbers Mar,29备课方式集体（负责人奚志芳）个人课时分配1课时问题收集与学情分析1the kids are interested in matns.2their learning attitude are very good.3they may know the counting units.教学目标知识与能力目标1try to count squares to learn new counting units.100%2try to know relationship between them.90%过程与方法目标Activity “ to count the numbers” to develop the sense of maths.教学重/难点Learn to know counting units” thousand and 10 thousands”.情感态度价值观目标To get large numbers in our life.To know the importance of numbers.教学形式Ss activities centered学法指导Independent team work德育渗透内容To get large numbers in our life.To know the importance of numbers.教学辅助手段准备及检查多媒体 ppt学具教具实验准备辅助材料其他 准备 教学过程设计：一、reviewCount numbers one by oneCount numbers in group of 2Count numbers in group of 5count numbers in group of 10Count numbers in group of100Q: how many counting units did we learn? What is the relationship?二、new lesson1)lead in T:show them ppt. do you know these pictures?S: talk about the pictures they know.T: read these numbersS；follow the teacherT: what can you get from these numbers?S; larger than beforeT:can you find large numbers in our life?S: talk about large numbers they knew2)to learn counting units thousandT: show them 1 big cube, how many small cubes in this one?Activity: kids try to put their cubes together to make 10,100,1000T:who knew the counting the units of 1000?S: thousand 千3）to learn counting units “10thousand” Activity:10 big cubes altogether. Ss try to use the paper card to join in the game.T: do you know how many small cubes here?S:1000,2000T: 10 thousands is 10000.T: what is the units of 10000? 万三、exerciseQ1: how many cubes are there?100+20+5=125Q2: xiaoming: 1000+200+10+1=1211 Xiaohong: 1000+100+30=1130Activity：play cards The kids put their cards on a desk and have to add them together.四sum upWhat did you learn? 问题设计及教学呈示重点提示复习数数复习计数的单位书写板书ppt呈示图片，学生进入讨论熟读这些数字引入新知：生活中的大数生自我观察：联系生活找大数呈示ppt重点知识突破说出千的单位引入新知：万板书呈示：重难点突破完成巩固练习提高题目练习游戏巩固所学总结收获 板书设计Counting umbers 万 千 百 十 个10个一是10。10个10是100。10个100是1000。10个1000是1000。作业设计册p22课后检查与反思学生参与课堂非常积极，能够较好的理解小题目。课题Using abacus to record numbers Mar，30 备课方式集体（负责人奚志芳）个人课时分配1课时问题收集与学情分析1.these kids know this knowledge well.2.they know 3-digit numbers well by using abacus.3 they are interested in maths.教学目标知识与能力目标1to know counting units under 10 thousand.100%2try to learn the numbers under 10 thousand. try to read and write numbers.90%过程与方法目标A lot of exercise help the kids learn this new knowledge.教学重/难点How to read and write numbers under 10 thousand.Write number under 10 thousand.情感态度价值观目标Try to build active attitude to learn maths.教学形式Ss activities centered学法指导Co-operate learning德育渗透内容Try to excite the kids interest教学辅助手段准备及检查多媒体 ppt学具教具实验准备辅助材料其他 准备 教学过程设计：一、reviewT:who can tell me some big numbers in our life?S: give me some examples.T: so we well learn some big number today.二、new lesson1)3-digit numberT: count numbers from 298.S: try to count numbers one by one.T: then we will learn the numbers on the abacus.2 is in the hundreds place. 9 is in the tens place. 8 is in the units place. Then tell them the way to read numbers.S: count numbers together298,299,300.301,302T: the numbers 302, pay attention to how to read.2）4-digit numberEg:3798, (3801，3800)T: show this on the abacusS: try to tell us how to get it.S: 3 thousand 7 hundred 9 ten 8T：then count the numbers in group of 100.三、exercise1) T: write some numbers on the boardS: kids show these numbers on the abacus2) activity: read numbers, write numbers , show numbers on abacus四、 sum upWhat did you learn? 问题设计及教学呈示重点提示举例说出生活中的大数介绍3位数活动：数一数读一读写一写拨一拨重点突破介绍4位数活动：数一数读一读写一写拨一拨难点：零到底读不读巩固练习拨一拨读一读写一写总结收获 板书设计拨一拨3-digit number 4-digit number298 二百九十八 3798 三千七百九十八作业设计册书P41选作课后检查与反思学生对所学的知识已能独立应用，不过对于灵活的简便运算有时也只能按基本方法完成。课题 Compare numbers Apr,1备课方式集体（负责人奚志芳）个人课时分配1课时问题收集与学情分析1now the kids can compare numbers.2they can not read the English terms.3they are interested in maths.教学目标知识与能力目标1try to learn how to compare numbers under 10 thousand.100%2try to use, greater than, to connect 2 numbers.Activity: use cards to show numbers then to compare them. 3) compare all numbers1-digit 2-digit 3-digit 4 digit三、exercise1) the smallest/biggest 1/2/3/4 digit numbers. Try to compare.2)guess the numbersT: have a number in heart 问题设计及教学呈示重点提示活动练习猜数报一报自己的数将数字分类三位数的大小比较重点巩固用符号连接数字尝试用英文来说活动练习四位数比较大小重难点突破 学生尝试组织语言来描述小练习巩固比较各种位数的数课堂提高练习比较特殊的数“最大最小” 板书设计Compare numbers 3-digit numbers 4-digit numbers is bigger than is smaller than作业设计册P24课后检查与反思学生理解速度很快，并能够自己尝试总结小规律，参与小活动很积极，作业完成较好。课题 Review:4-digit numbers Apr,2，6备课方式集体（负责人奚志芳）个人课时分配2课时问题收集与学情分析1the kdis know 4-digit numbers well.2they learnt this before.3they only know a little English terms.教学目标知识与能力目标1to count numbers in groups.counting units95%2compare numbers.90%过程与方法目标Exercise help them learn.教学重/难点To count numbers in group of 100,500,1000.Counting units and how to compare numbers.情感态度价值观目标To feel the close relationship between math and our life.教学形式Practice.学法指导Independent learning德育渗透内容To feel the close relationship between math and our life.教学辅助手段准备及检查多媒体 ppt学具教具实验准备辅助材料其他 准备 教学过程设计：一、count numbersCount numbers 1 by 1Count numbers in group of 2Count numbers in group of5Count numbers in group of10Count numbers in group of50Count numbers in group of100Q1:give some 1/2/3/4-digit numbers二、counting unitsTh h t u5 7 4 65 is in the thousands place, means 50007is in the hundreds place, means 7004 is in the tens place, means 406 is in the units place, means 6三、compare 4-digit numbersThe ways to compare numbers:1) 1-digit number 2- digit number2) 2-digit number 3-digit numbers3) 3-digit numbers 4-digit numbers4) 4-digit numbersa) compare thousands placeb) compare hundreds placec) compare tens placed) compare units place 四、exerciseFinish the worksheet together 问题设计及教学呈示重点提示数数练习游戏：数字接龙练习读数介绍计数