The most basic elements of education are: educators, educatees, educational contents and educational materials. Educators and educatees belong to human factors, while educational contents and materials belong to educational measures and are material factors. Their role is: (1) The task of educators in the educational process is to study the educational purpose, content, method, process and organizational form, and they are in the position of leadership, control and teaching in the educational process, and they are the leaders of educational activities. (2) The educated are the learning subjects in the education process. Educated people should transform external educational contents and educators' requirements into their own wisdom, talents, thoughts and behaviors. Therefore, the educated should actively participate in educational activities and give full play to their subjective initiative in this transformation process; (3) Any educational activity is inseparable from educational content, which refers to the information transmitted in educational activities. Without educational content, it is impossible to produce educational activities. (4) From the perspective of the development of education, the material resources selected and created by educators have more entered the education process, and their richness, advancement and quality directly affect the quality of education. ?