要想上好一堂数学课,良好的开端是成功的一半。几十年来,我一直努力探索和试验,总结出了数学课的几种导入方法。一、温固知新导入法温固知新的教学方法,可以将新旧知识有机的结合起来,使学生从旧知识的复习中自然获得新知识。例如:在讲切割线定理时,先复习相交弦定理内容及证明,即“圆”内两条相交弦被交点分成的两条线段长的积相等。然后移动两弦使其交点在圆外有三种情况。这样学生较易理解切割线定理、推论的数学表达式,在此基础上引导学生叙述定理 To start a good math class, a good start is half the battle. For decades, I have been trying hard to explore and experiment, summed up several introduction methods of mathematics classes. First, Wen Guzhi’s new introduction method, Wen Wenzhi’s new teaching method, can combine the old and new knowledge organically and enable students to naturally acquire new knowledge from the review of old knowledge. For example, when speaking about the cutting line theorem, first review the contents of the intersecting string theorem and prove that the product of the two line segments divided into two intersecting strings in the “circle” is equal. Then move the two strings to make the intersection point outside the circle in three cases. This makes it easier for students to understand the mathematical theorem of the cutting line theorem and inference, and guides the students’ narrative theorem on this basis.