数学教学的主要手段就是课堂讲解。数学课堂教学中的有效讲解,是指教师在有限的时间内,激发学生自主探究的兴趣和学习动机,引导他们主动地去分析问题和解决问题,启发学生积极思考,通过自主探究获得新知识。教师在讲解时要关注学生的有意注意、学习状态、对讲解内容的参与度以及学生思维的清晰度。教师要根据学生的表现,及时地调整讲解的方法,使讲解对学生知识的自主建构起到必不可少的引导作用。有的老师在台上讲得津津有味,台下的学生却听得昏昏欲睡。为什么呢?这就是无效讲解。下面,结合我自己在教学中的具体做法,谈谈小学数学课堂 The main method of mathematics teaching is to explain in class. The effective explanation in the classroom teaching of mathematics refers to the teachers’ motivation to motivate the students to explore independently and guide them to analyze and solve problems proactively within a limited time, inspire the students to think positively and gain new knowledge through independent inquiry. Teachers should pay attention to students ’intentional attention, state of learning, participation in explaining the content and the clarity of students’ thinking. Teachers according to the performance of students, timely adjustment of the method of explanation, so that the explanation of the independent construction of student knowledge play an essential role in guiding. Some teachers talked about relish on the stage, but students listened to drowsiness. Why? This is invalid explanation. Below, with my own practice in teaching, talk about the primary school mathematics classroom