This research tried to clarify the educational phenomena in the school based on the educational intrinsic principles. After reviewing studies on the institutionalization of schooling, the present researcher found that those studies were not relevant enough to explain the educational facts in the school, and tried to suggest the alternatives based on the euducational intrinsic principles and find the ways to educationalize schooling. The educational intrinsic principles have presented a new educational theory structure to explain educational facts in our daily life. According to the principles, man is likely to learn whenever he does not understand anything, while he is likely to teach onece he has understood that. These principles tried to explain such human nature of education on the basis of two new concepts such as ascending and descending of education. The school is one of many life spaces, but can be an excellent educational space among them. The educational intrinsic principles have been recently suggested to reconceptualize education and try to reconstruct and systematize the educational theory in a new research paradigm. It provides us with new concepts and methods for interpreting and comprehending educational facts in the school. With the help of these principles, the alternative educational ideas on the ends, materials, activities and evaluations of education could be set up and contribute to the educationalization of schooling.