In fact, setting up key classes is a disguised challenge to the Compulsory Education Law and should be considered illegal. The compulsory education law was formally implemented. It has two outstanding highlights: first, it has established a guarantee mechanism for compulsory education funds; The second is to promote the balanced development of compulsory education. Comparatively speaking, it is clear that the government's responsibility for compulsory education is shared by the central and local governments, and everyone has a high consensus, so it is easier to implement after the system is formed; However, it is quite difficult to implement the balanced development of compulsory education. Article 22 of the new Compulsory Education Law stipulates that "the people's governments at or above the county level and their education administrative departments shall promote the balanced development of schools, narrow the gap in running conditions, and may not divide schools into key schools and non-key schools. Schools are not allowed to set up key classes and non-key classes. " Article 57 stipulates that if the school has "divided key classes and non-key classes", "the education administrative department of the people's government at the county level shall order it to make corrections within a time limit; If the circumstances are serious, the directly responsible person in charge and other directly responsible personnel shall be punished according to law. " If measured by this provision, it can be said that most primary and secondary schools are suspected of breaking the law at present, which we must face squarely and face. Therefore, the implementation of compulsory education law should not only cure the symptoms, but also cure the root cause. It is both a protracted war and a tough battle; Relevant measures should not only be firm and tough, but also be operable and accountable. The feasible concrete suggestions are as follows: first, resolutely ban and investigate all kinds of school selection behaviors of compulsory education schools, including the behavior of "co-construction" between the competent authorities and key schools; Audit key primary and secondary schools, investigate the legal responsibility of the person in charge of the violator according to law, and collect illegal income such as school selection fees. The second is to investigate and deal with key schools and classes that evade the law in disguise, strictly control the proportion and number of "experimental schools" and "experimental classes" that actually have experimental projects, disclose all information to the public and accept social supervision. Third, conduct regular inspections on the implementation of the Compulsory Education Law, publish the inspection results, and take them as an important evaluation of local governments and education authorities, and hold them accountable. Of course, in the long run, in order to completely eliminate school selection competition and establish the normal order of compulsory education, we must effectively narrow the gap between schools and reform the junior high school entrance examination and senior high school entrance examination system. There are many mature experiences in this field, which are worth learning and learning, and really promote the balanced development of compulsory education.