This is divided from the presentation form of educational function, and the dominant function of education is the consistent result of education in actual operation according to educational purposes. For example, promoting people's all-round harmonious development and social progress is the expression of explicit educational function. The recessive function of education is an unexpected function accompanied by the dominant function. For example, education replicates existing social relations, reproduces social inequality, and schools take care of children, all of which are manifestations of hidden functions. The difference between overt and covert is relative. Once the hidden potential function is consciously developed and utilized, it becomes an explicit educational function.