In ancient China, Mozi put forward that the teaching principle embodied in "a wise man must do something" is the principle of ability. To implement the principle of ability in teaching, it is important to correctly understand students and scientifically estimate their knowledge and intelligence level.

Traditional teaching often underestimates students' acceptance ability. In particular, the possibility of developing abstract thinking ability of lower grade children is underestimated. Therefore, the design of teaching content and teaching methods often passively adapts to the existing level of students, which actually hinders the continuous improvement of teaching requirements and students' level.

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Some educators have mentioned some requirements called "teaching rules", which are closely related to the principle of ability. These laws are: from near to far, from known to unknown, from simple to complex, from easy to difficult, from concrete to abstract, from local to whole and so on. These rules should be applied flexibly according to specific circumstances.

For example, what is known is not necessarily simple, and what is simple is not necessarily easy; History teaching is not necessarily from near to far in time; Geography teaching is not necessarily from near to far in space; Teaching can be from concrete to abstract, and from abstract to concrete.

The central problem of carrying out the principle of ability is to proceed from the actual possibility of students' development, give full play to the leading role of teaching and teachers, and most actively promote the growth of students' knowledge and the development of their learning ability.