变式教学是对数学中的定理和命题进行不同角度、不同层次、不同情形、不同背景的变式,以暴露问题的本质特征,揭示不同知识点间的内在联系的一种教学设计方法。通过变式教学,对教材中的一些典型习题进行变换、串联、延伸,是提高课堂教学质量,培养学生解题能力的有效途径,也是培 Variant teaching is a kind of teaching design method that exposes the essential characteristics of the problem and reveals the intrinsic connection among different knowledge points by making the variations of the theorems and propositions in mathematics from different perspectives, different levels, different situations and different backgrounds. Through variant teaching, some typical exercises in teaching materials are transformed, connected in series and extended, which is an effective way to improve classroom teaching quality and develop students' ability to solve problems.