各学科课程标准实施至今,“拓展”成为追求的一个新目标。的确,数学课程的拓展开阔了学生的视域,为课堂教学带来了生机。但是,纵观时下的数学课堂教学,教师为了活跃学生思维,无度、失效、不当的拓展便随处可见,使学生不堪重负,严重挫伤了学生的学习积极性,反而使课堂教学效率变得低下。究其原因,主要是教师的课程意识较为淡薄。 Since the implementation of various subject curriculum standards so far, “Development ” has become a new goal pursued. Indeed, the expansion of math curriculum broadens the student’s perspective and brings vitality to classroom teaching. However, looking at the current mathematics classroom teaching, in order to active students thinking, excessive, invalid, improper expansion can be seen everywhere, so that students overwhelmed, seriously dampened students’ enthusiasm for learning, but to make classroom teaching efficiency becomes low. The reason, mainly teachers’ awareness of the curriculum is relatively weak.