作为一名数学教师,课堂教学的目标就是让学生对数学知识有较为深刻的理解和把握.笔者认为,变式教学是一种很好的手段.本文以《全等三角形》的复习课为例说明.一、课题引入有效的课堂引入应建立在学生的主观愿望和知识经验基础之上,教师应帮助学生在自主探究的过程中理解数学知识,掌握数学基本技能. As a mathematics teacher, the goal of classroom teaching is to let students have a more profound understanding and grasp of mathematics knowledge.In the author’s opinion, variant teaching is a very good method.This paper takes the review class of “congruent triangle” as an example First, the introduction of the subject into an effective classroom should be based on the students’ subjective desire and knowledge and experience, teachers should help students in the process of independent inquiry to understand mathematical knowledge, master the basic skills of mathematics.