“一元二次方程”是一节概念教学课 ,徐洪殿老师的教学设计充分体现了“教师为主导、学生为主体” ,学生讨论、学生活动、学生独立探究的教学模式 ;主要采用了概念形成的方式 ,充分暴露了数学的思维过程 ,让学生积极主动地去探索“一元二次方程”概念的发生过程 ,即从两个生活? “One-dimensional quadratic equation” is a concept teaching class. Xu Hongdian’s teaching design fully embodies the “teacher-led, student-centered”, student discussion, student activities, and student independent inquiry teaching model; The method fully exposes the thinking process of mathematics and allows students to actively and actively explore the process of the concept of “one dollar quadratic equation”, that is, from two lives?