数学解题教学中变式的意义和现代发展

The Significance and Trend of Variant in the Solution-teaching of Mathematics

变式是问题解决的有效铺垫，深化理解的有效途径，提高效率的有效手段，变式还可帮助学生转变学法，跳出题海。要让学生自主变式成为解题教学中变式的现代发展方向。学生自主变式，需要教师的逐步引导，需要通过示例让学生感知变式的过程、方法，提出要求让变式成为学习任务、成为学习习惯。

As a great helper to the solution of problems, an effective enhancer of understanding, as well as a powerful promoter of efficiency, variant is also a contributing factor to students＇ alteration of learning methods and exemption from a wealth of questions. Accordingly, a prevailing trend in modern solution-teaching is to help students develop the ability of doing variants independently. Therefore, teachers should give students rational guidance, acquaint them with the processes and methods of variant, and make demands for students that variant should become their learning task and habit.