例谈几何教学中例习题“变式”的技巧与方法

• 作 者: 郭萍
• 机 构: 四川省绵阳二中,
• 出 处: 中小学数学(初中版)
• 发表日期: 2013年Z1期
• 关键词: 变式 几何教学 习题教学 解题能力 角边角 思维能力 课堂教学效益 图形结构 学习负担 思维惰性

变式教学就是对数学中的命题、例题、习题进行不同角度、不同层次、不同情形、不同背景的变式,从而暴露问题的本质特征,揭示不同知识点之间的内在联系的一种教学方法.通过变式例题、习题教学,可达到一题多用、一题多解、一法多用、多题归一的效果,从而提高学生的学习积极性,拓宽学生的思维空间.如何将一个题目恰当的变式,达到最理想的效果呢?通过多年的教学实践,总结出以下几种方法和技巧,现举例说明.一、简单变式不改变题中文字内容及图形结构,只将条件和结

Variant teaching is a teaching method of revealing the intrinsic characteristics of a problem and revealing the intrinsic relations among different knowledge points by making variations on the propositions, examples and exercises in mathematics at different angles, at different levels, in different situations and in different backgrounds Through variant examples, exercises teaching, you can achieve the effect of a multi-purpose, a multi-solution, a multi-purpose, multi-theme normalization to improve students’ learning enthusiasm and broaden their thinking space. Variant, to achieve the best results? Through years of teaching practice, summed up the following methods and techniques, are an example of a simple variant does not change the title of the Chinese text and graphics structure, only the conditions and results