变式是模仿与创新的中介,是创新的重要途径。变式教学可以让教师有目的、有意识地引导学生从“变”的现象中发现“不变”的本质,从“不变”的本质中探究“变”的规律,可以帮助学生使所学的知识点融会贯通,从而让学生在无穷的变化中领略数学的魅力,体会学习数学的乐趣,有利于培养学生思维的深刻性、广阔性和创造性。本文主要从笔者高三复习的几个教学案例探讨高 Variant is the intermediary of imitation and innovation, and it is an important way of innovation. Variant teaching allows teachers to purposefully and consciously guide students to discover the nature of “invariable” from the phenomenon of “change”, and explore the laws of “change” from the essence of “invariable”. It can help students to integrate the knowledge they have learned, so that students can enjoy the charm of mathematics through infinite changes, experience the joy of learning mathematics, and help cultivate the deepness, broadness, and creativity of students’ thinking. This article mainly discusses the high number of teaching cases reviewed by the author