“做中学”提倡让学生在各种各样的操作活动中体验知识的生成过程、发展过程,主动地发现知识,感悟数学知识的来龙去脉。随着课改的深入,“动手操作、自主探究、合作交流”的教学模式在新课程数学课堂上时时露面。然而有时数学课堂上所呈现的探究材料、探究所要围绕的问题和数学学习方式缺乏数学结构,缺乏数学知识的本质属性,造成学生探索的无序、盲目和低效。 “Do high school ” to promote students to experience the formation of knowledge in a variety of operational activities, the development process, take the initiative to discover knowledge, insight into the context of mathematical knowledge. With the deepening of curriculum reform, “hands-on operation, independent exploration, cooperation and exchange ” teaching mode in the new curriculum math class appearances. However, sometimes the materials presented in mathematics classroom, the problems to be explored and the maths learning mode lack the mathematical structure and lack the essential attribute of mathematical knowledge, which leads to the disorder, blindness and inefficiency of students’ exploration.