传统的数学课堂教学以教师讲授为主,很少让学生通过实践和探索活动来获得知识、得到发展。为此,新一轮数学课程改革把改善学生学习方式作为重中之重,强调动手实践、自主探索、合作交流是学生学习数学的重要方式。随着课程改革的不断推进,“动手实践、自主探索、合作交流”等“活动型”课堂已成为数 The traditional teaching of mathematics classroom teachers to give priority to, and rarely let students through practice and exploration activities to gain knowledge, development. To this end, the new round of mathematics curriculum reform to improve student learning as a top priority, emphasizing hands-on practice, independent exploration, cooperation and exchange is an important way for students to learn mathematics. With the continuous advancement of the curriculum reform, “hands-on practice, self-exploration, cooperation and exchange ” and other “activities ” class has become the number