如何使自己的教学更加有效,这是每个教师应有的追求,通过对一节《一元二次不等式及其解法》的案例的引入、新授等环节进行分析与点评,得出同课异构与有效教学的理念不谋而合,提出同课异构有利于激发教师创造,同课异构有利于诱导教师反思,同课异构有利于关注学生发展的三个“有利于”的观点,最终实现有效教学。 How to make one’s own teaching more effective is the proper pursuit of each teacher. By analyzing and commenting on the introduction and new instruction of the case of a unitary quadratic inequality and its solution, Concurrence with the concept of effective teaching, proposed that heterogeneity of the same class is conducive to inspire teachers to create, the same class is conducive to inducing teachers to reflect on the same class isomerism is conducive to concern for the development of students Point of view, and ultimately achieve effective teaching.