课程改革以来,大部分教师非常注重课堂教学情境创设、探索新知、课堂互动的有效性。但是,却没有关注习题的设计,忽视了练习这一环节。有效练习是提高小学数学课堂效率的催化剂,教师要善于借助网络资源来设计有效的数学练习。 Since the curriculum reform, most teachers have paid great attention to the creation of classroom teaching situations, exploring the effectiveness of new knowledge and classroom interaction. However, it did not pay attention to the design of exercises, neglected the practice of this part. Effective practice is to improve the efficiency of primary mathematics classroom catalyst, teachers should be good at using network resources to design effective mathematical exercises.