评课是教研的主阵地,是教师实现从教书匠到学者型教师转变的主课堂。本文以“四子”——案子、镜子、尺子、孩子——为契机,通过分析教学理论、课堂教学和教学设计的关系、评课者和被评者的态度和评课的意义等的阐述,说明评课的方法和评课对于教学的意义,为营造广大教师评课时敢发言、想发言、会发言的氛围提供依据。 Assessment class is the main front of teaching and research, is the teacher to achieve from teacher to scholar-teacher changes in the main classroom. By analyzing the relationship between teaching theory, classroom teaching and instructional design, this paper analyzes the attitudes of appraisers and critics as well as the significance of appraisal class by taking “Four Sons” - cases, mirrors, rulers and children as chances. , Explain the method of class evaluation and the significance of teaching evaluation for teaching, to provide the basis for creating the atmosphere of daring to speak, want to speak, and to speak when the majority of teachers comment on class.