新课标指出:“有效的数学学习活动不能单纯地依赖模仿与记忆,动手实践、自主探索与合作交流是学生学习数学的重要方式。”由此可见,有效数学课堂教学应关注学生在课堂中的有效参与,而有效参与是在学生丰富的学习体验活动中和多样的学习方式中呈现。小学数学科的概念教学,最令师生厌烦,因为概念本身既抽象,又枯燥乏味,且易混,尤其是几何概 The new curriculum standard states: “Effective mathematics learning activities can not rely solely on imitation and memory. Hands-on practice, independent exploration and cooperation and exchange are important ways for students to learn mathematics.” Thus, effective mathematics classroom teaching should pay attention to students’ Effective participation in the classroom, and effective participation in the students rich learning experience activities and diverse learning presented. The concept of primary mathematics teaching, most teachers and students tired, because the concept itself is abstract, and boring, and easy to mix, especially geometry