As an educational theory or ideological trend, formal education is formed and developed in the long-term educational theory and practice. Strictly speaking, it is hard to say that there are neither initiators nor masters, but the summary of this educational thought and its tendency made by future generations. So it is difficult to find a definition that is both concise and in line with everyone's intentions.

The task of education is to train the ability of the mind. All kinds of organs on the body can only be developed through practice; The ability of the mind, and only with practice can make them tuxedo. The main task of education is to discover those mental abilities that can train students' various senses most effectively.

Education should aim at form. People think that instilling knowledge in education is far less important than training faculties. If human faculties are developed through training, any knowledge can be absorbed at any time. The value of knowledge is that as a training material, even if the content of learning is forgotten, it still leaves a permanent and more valuable effect. Therefore, it is not necessary to attach importance to the practicality of courses and textbooks, but to their training role.