变式教学是指在教学中用不同形式的直观材料或事物,说明事物的本质属性;或变换同类事物的非本质特征,以突出事物的本质特征。数学教学中,教师如若能灵活地运用变式教学,定能有效 Variant teaching refers to the use of different forms of intuitive materials or things in teaching to illustrate the essential attributes of things; or to transform non-essential features of similar things to highlight the essential characteristics of things. In mathematics teaching, if teachers can flexibly use variant teaching, they will be effective.