A: According to people's age characteristics and psychological development level, Zhu divides school education into two stages: "primary school" and "university". He believes that the age of eight to fifteen is the primary school stage, and children from princes to ordinary people can enter school. Primary school is the stage of laying the foundation, and the teaching content is "learning from the classics", that is, teaching children ethics first, and then teaching children poetry, books, rituals and music, hoping that children will be trained in practical activities and become "sages". In terms of educational methods, Zhu advocated that the implementation of early education should stimulate children's interest in learning with vivid teaching methods. For this reason, he specially compiled the book Primary School as a teaching material. At the same time, Zhu advocated the training of children's moral behavior in the form of "instruction" and "learning rules"

Zhu believes that after the age of fifteen, it is the university stage, and the enrollment targets are mainly aristocratic children, but also a few outstanding civilian children. The teaching content of universities is to "understand things" on the basis of primary schools, and finally achieve the goal of "stopping at perfection". University textbooks are mainly the Four Books and Five Classics, especially The Analects of Confucius, Mencius, University and The Doctrine of the Mean. Teaching methods are mainly self-study and communication between different viewpoints.

Although Zhu divided the education stages according to the different educational objects, and the teaching contents, methods and tasks of each stage were different, the fundamental goals of the two stages were the same, and Zhu's theory added fresh content to China's ancient education theory.