最近观摩了一堂有争议的数学公开课,课题是“二次函数的图象和性质(复习课)”(苏科版《数学》(九年级下)第六章第二节).笔者认为从这一节课中集中反映出了当前影响中学数学课堂教学质量的若干问题,本文拟以研究的视角对这一节课的教学思路进行点评,并对构建高效的中学数学课堂教学的实践阐述自己的观点,以期与同行共商. Recently, I watched a controversial math open class on the topic of “The Image and Nature of Quadratic Functions (Review Class)” (Subsection 6 in Chapter 9, Sukarno Edition). It is considered that some problems that affect the quality of mathematics teaching in middle school are reflected from this class. This paper will make a comment on the teaching ideas of this class from the perspective of research and put forward some suggestions on how to construct an efficient middle school mathematics classroom Explain your point of view, with a view to discussing with your peers.