二下数学教案4单元.docVIP

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 1\the kids are interested in matns. 2\their learning attitude are very good. 3\they may know the counting units. 教学目标 知识与能力目标 1\try to count squares to learn new counting units.100% 2\try 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、review Count numbers one by one Count numbers in group of 2 Count numbers in group of 5 count numbers in group of 10 Count numbers in group of100 Q: how many counting units did we learn? What is the relationship? 二、new lesson 1)lead in T:show them ppt. do you know these pictures? S: talk about the pictures they know. T: read these numbers S；follow the teacher T: what can you get from these numbers? S; larger than before T:can you find large numbers in our life? S: talk about large numbers they knew 2)to learn counting units thousand T: show them 1 big cube, how many small cubes in this one? Activity: kids try to put their cubes together to make 10,100,1000 T: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:1000,2000… T: 10 thousands is 10000. T: what is the units of 10000? 万 三、exercise Q1: how many cubes are there? 100+20+5=125 Q2: xiaoming: 1000+200+10+1=1211 Xiaohong: 1000+100+30=1130 Activity：play cards The kids put their cards on a desk and have to add them together. 四\sum up What 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