A. Teachers, students and teaching materials B. Teachers, students and teaching contents C. Educators, educatees and educational contents D. Educators, educatees and educational environment

The expansion of the basic definition of educational activities;

Educational activities can be divided into broad sense and narrow sense. In a broad sense, it refers to various educational activities that affect people's physical and mental development, while in a narrow sense, it mainly refers to school educational activities.

Formally, there are teaching activities, extracurricular activities and practical activities; From the subject of activities, there are activities of managers, teachers and students; From the content point of view, there are many activities such as moral education, intellectual education, physical education, aesthetic education, labor and technology education, and the development of individual specialties. The purpose of educational activities, whether broad or narrow, is to cultivate and train people.

Expand the role of educational activities;

Education is the process of making people become people, and it is the growth process of fresh life. Educated people, as the main body of this process, deserve attention and awe. The real significance of personalized education lies in the return of educational core values and the release of students' individuality. The value lies in solving the problem that the educated have basic scientific research, practice, experiment, experiment, imitation and innovation enlightenment. Promote and help the educated to have and accept the basic skills of production practice such as specialization, industrialization, standardization, informationization and other scientific inventions.