Pre-institutionalized education
Pre-institutionalized education began with primitive social education in the early stage of mankind, and formal education (entity education) gradually appeared after slave society.
Institutionalized education
Institutionalized education mainly refers to formal education, that is, it extends from primary school to university. In addition to ordinary academic studies, it also includes many professional courses and teaching institutions suitable for full-time vocational and technical training. It has a hierarchical structure and is graded according to age. The emergence of schools means that educational activities are specialized and educational forms tend to be stereotyped
Non-institutionalized education
The ideal advocated by non-institutionalized education is that "education should no longer be confined to the walls of schools". The concept of informal education advocated by Coombs and others and the concept of unschooling advocated by ilych are both representatives of the trend of non-institutionalized education. At the same time, the ideal of building a learning society now advocated is also an important embodiment of non-institutionalized education.