Double base usually refers to the "double base" of basic knowledge and skills in school teaching content. The curriculum theory, which advocates that basic knowledge and skills are the core of teaching content in ordinary primary and secondary schools, is the "double-base theory" This curriculum theory is rooted in the land of China and has a far-reaching impact on contemporary curriculum practice in China. The advantages and disadvantages of the current primary and secondary school curriculum are closely related to the "double-base theory".
Four educations refer to: patriotic dedication education, revolutionary outlook on life education, respect for teachers and love for soldiers education and hard work education. Education in a narrow sense refers to specially organized school education.