数学教学是数学活动的教学。有效的学习活动常以丰富多彩的材料为媒介,教师是数学学习活动的组织者。这一角色主要体现在教师组织学生发现、寻找、搜集和利用学习资源,即学习的素材。随着新课程的不断推进,在教学实践中,许多教师通过学习素材的选择来激发学生学习的积极性,向学生提供 Math teaching is a teaching of mathematics activities. Effective learning activities are often mediated by a variety of materials, and teachers are the organizers of math learning activities. This role is mainly reflected in the teachers organize students to find, find, collect and use of learning resources, that is, learning material. With the continuous advancement of the new curriculum, in the teaching practice, many teachers arouse the enthusiasm of students’ learning through the choice of materials, and provide them with the students