(2) "Society is the school": traditional schools have built a high wall between schools and society, and "society is the school" is to break through this high wall and thus extend the school to the whole society. In this "great school", everyone can be a teacher, everyone can be a student, and "what you catch is all living books, all knowledge and skills"
(3) "Combination of teaching and doing": the method of teaching should be based on the method of learning; The learning method should be based on the method of doing. Learning to do things, teaching to learn, teaching and learning are all centered on doing.