Professor Ye Lan of East China Normal University believes that the standard of a good class should follow the "five realities", which can be summarized as: 1 and solid. A good class should be a meaningful class. For students' learning, Mr. Ye Lan thinks there are three levels of meaning: primary meaning-learning things; Intermediate meaning-exercise ability; Advanced meaning-having a good and positive emotional experience and generating a strong demand for further study. 2. Enrichment. "A good classroom should be an efficient classroom." Efficiency is manifested in at least two aspects. First, on the other hand, it is effective for how many people in the class, and it is the same for excellent students, average students and students with difficulties. The second is the efficiency level. Without efficiency, it is not a good class. Efficient classroom is a full classroom, and it is a classroom with content. 3. rich. "A good classroom should be a living classroom." A class is not entirely the result of presupposition, but the exchange of true feelings and wisdom in the class. This process has both resource generation and process state generation. 4, dull. "A good class should be a normal class." The value of classroom lies in the collision between teachers and students, mutual discussion and the emergence of many new things. This kind of class is called plain class, which can be taken at any time, not only now. ..... No matter who is listening to the class, the teacher must be there, and there are only students in mind. 5, true. "A good class should be a class to be improved." Can't be perfect. It should be true, unadorned and worthy of reflection. Classes that can be rebuilt. If it is true, it is flawed. Truth is also an important index to evaluate a good class. Without truth, "good lessons" will lose their value. Although the fake class can be a temporary success, it is not conducive to teachers to establish research awareness, and it is not conducive to teachers' transformation to research. The "five realities" evaluation standard put forward by Ye Lan gives us a beautiful answer on how to have a good class, and points out the direction for us to improve our professional quality and teaching ability, promote students' active development, solidly promote classroom teaching research and implement the new curriculum concept.