Treatment: Being admitted to six schools at the same time embodies family education and further proves the importance of family education. What most people see is Zheng's teaching students in accordance with their aptitude. For the two children, the son does not adapt to school education and adopts family education, while the daughter likes school education and stays in school for a long time.

Although Zheng's father dropped out of primary school, he also made some achievements through self-study, and so did Zheng. He seemed to follow his father's old path, but he still made great achievements.

Private education:

Zheng is very talented. He writes textbooks for children, including law, innovation and questioning, philosophy, sexual knowledge, morality, safety and self-help, historical geography, art, finance and economics, writing and mathematics.

However, we know that no matter how talented Zheng is, he may be proficient in every subject, and he knows and understands every subject very well, so the knowledge he teaches children will not be very accurate and comprehensive.

School education is different. Every course is taught by professional teachers, so the accuracy, breadth and depth of professional teachers' understanding of this course are beyond the reach of "private school" education like Zheng. Therefore, school education is more systematic and professional.