“万事开头难”.要想上好一堂数学课,良好的开端是成功的一半.十几年来,我一直在努力探索和实验,总结出一些数学教学导入的方法.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地结合起来,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.学生较易理 “To start a good math class, a good start is half the success .For more than a decade, I have been trying to explore and experiment, summed up some of the methods of teaching mathematics into. New introduction method Wen-qi new teaching methods can be organic combination of old and new knowledge, so that students learn from the old knowledge of natural new knowledge.For example, say ”cutting theorem “, review the intersection of chord theorem content And prove that the intersection of two intersecting chords within ”circle " is equal to the product of the lengths of the two line segments that are intersected by the intersection point, and then moving the two strings to make the point of intersection outside the circle have three situations.