动态几何问题一直是我们数学教学中的重点和难点,也是中考热点,其中难点是学生不能把握图形运动与变化的全过程,不会分类讨论。所以笔者在设计这节课时,首先确定这节课的复习目标:用运动与变化的眼光观察和研究图形,解决动态几何问题;复习重点是把握图形运动与变化的全过程,抓住界点,分类研究。下面是该教学过程。 Dynamic geometric problems has always been our focus and difficulty in mathematics teaching, is also a hot test, one of the difficulties is that students can not grasp the whole process of graphic movement and change, will not be classified discussion. So in the design of this class, I first determine the review goal of this class: observation and study of graphics with motion and change of vision to solve dynamic geometry problems; review the focus is to grasp the whole process of graphics movement and change, seize the boundary point, Classification studies. The following is the teaching process.