近年来,教材中的例、习题越来越受到命题者的青睐,因此,在平时的教学中,要加强对典型例、习题的研究,不断地挖掘教材中例、习题的内在“潜能”。本文提出教师如何精制精导:究寻问题因源,激活学生头脑、优化问题层次,启发学生思考、改进问题方式,提高学生理解,这样既能充分发挥教师能动的组织、引导作用,又能充分调动学生学习的主动性,提高初中数学课堂教学的实效。 In recent years, the textbook examples, exercises more and more by the proponents of the favor, therefore, in the usual teaching, we should strengthen the typical cases, exercises, and constantly digging textbook examples, exercises the inherent “potential ”. In this paper, the author proposes how the teacher should be refined and refined: to find out the source of the problem, to activate the student’s mind, to optimize the level of the problem, to inspire the student to think, to improve the way of the problem, and to improve the students’ understanding. This will give full play to the teacher’s active organization and guidance, Mobilize the initiative of students to improve the effectiveness of junior high school mathematics classroom teaching.