Individual teaching
Before the Song Dynasty in China, and in ancient and medieval Europe, all levels of official and private schools adopted individual teaching. In the long slave society and feudal society, it was the main or even the only form of teaching organization. Individual teaching means that teachers teach specific content to one or several students at the same time. This kind of teaching organization is small in scale, slow and inefficient, but it can better adapt to individual differences.
Classroom teaching
That is, a certain number of students are organized into fixed classes according to their age and knowledge level, and teachers are arranged to give collective lectures to the whole class in a planned way according to the weekly class schedule and schedule.
Guiding system
Teachers choose older students with good grades as "mentors", and teach them textbooks first, and then they transfer them to other students. This form of teaching organization is difficult to guarantee the quality of teaching, so it didn't last long.
Group teaching
Group teaching can take care of the differences of students' learning level and ability, but it also has a negative psychological impact on all kinds of students.