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平面几何教学是初中数学教学的一大难点,难首先难在启蒙教学上。我多次教过平面几何,有不少最初教学上失败的教训,也积累了一些经验,下面就平面几何的启蒙教学谈几点体会。一、讲好绪论课绪论课是激发学生兴趣、引导学生入门的最初一个环节。要讲好它,就要做好知识上和教学方法上的准备,倘若随便讲一下,不如不讲。一般地说,绪论课上谈的宜概括一些,通过几个对学生来说常见但不深知、容易引起学生思考的典型实例,使学生初步了解几何学研究的是现实世界中物体的形状、大小和位置关系,是一门很重要的数学基础学科;初步懂得几何体与现实生活中的物体的联系和区别,为讲几何的基本概念和其它重要概念及学习整门功课开个好头。
The teaching of plane geometry is a major difficulty in mathematics teaching in junior high school. It is difficult to be difficult in the teaching of enlightenment. I have taught plane geometry many times. There are many lessons that failed teaching in the first place, and some experience has been accumulated. The following is a brief discussion of plane geometry enlightenment teaching. First, give an introduction to the introduction of class excerpts is to stimulate students’ interest and guide students to get started. To do a good job of it, we must be prepared for knowledge and teaching methods. If we just talk about it, it’s better not to speak. In general, the introductory class should summarize some things. Through several typical examples that are common but not well known to the students and are likely to cause students to think, students are given a preliminary understanding that geometry studies the shape of objects in the real world. The relationship between size and position is an important basic subject of mathematics; it initially understands the connection and difference between geometric objects and objects in real life, and provides a good starting point for the basic concepts and other important concepts of geometry and learning the whole course.