It is a theoretical summary of Confucian education and teaching activities in the pre-Qin period, mainly discussing the concrete implementation of education and emphasizing the explanation of various relations in the teaching process. It is generally believed that its author is a school of thought, even referring to Mencius' student Ke. Its main contents include the function and purpose of education, the education system and school management, and the principles and methods of education and teaching.

In a word, Xue Ji's exposition is very rich and profound. Its series of educational principles and methods are full of dialectical factors and still have important reference significance. It is a very comprehensive and rigorous educational monograph, which deserves our continuous study.

The earliest educational monograph in China has a very strict system. One of them, The Book of Rites, was written at the end of the Warring States Period. According to Guo Moruo's textual research, the author is Ke, a student of Mencius. Xue Ji is concise and vivid, which systematically and comprehensively expounds the function, purpose and task of education, the system, principles and methods of education and teaching, the position and role of teachers, and the relationship between teachers and students and classmates in the process of education.

We advocate the combination of in-class and out-of-class, and the combination of textbook learning and practical training, which not only broadens our knowledge, but also cultivates noble moral sentiments and good living habits. The book uses more space to expound the dialectical relationship between "teaching" and "learning". It is believed that only through the practice of "learning" can we see the gap in our own learning ("learning before learning is insufficient"), and only through the practice of "teaching" can we see the deficiency of our own knowledge and experience ("teaching before learning is difficult").

Seeing the gap, we can make progress, seeing poverty, we can spur ourselves, and thus draw the correct conclusion that "teaching and learning learn from each other". Learning notes attach importance to heuristic teaching and step-by-step teaching to stimulate students' intrinsic learning motivation and cultivate students' learning consciousness. Attach importance to teaching students in accordance with their aptitude. It is argued that the basis of inspiration and induction is to understand the difficulty of students' learning and the beauty and evil of talent.

It advocates the teaching order from shallow to deep, from easy to difficult, from simple to complex, and puts forward the positive educational principle, that is, to guide students to develop in a good way before their bad behavior occurs. It is also pointed out that students should learn from each other in the learning process. The Book of Learning endows teachers with lofty status. Put forward the concept of strict and respectful teachers. Xue Ji is a valuable material for studying China's ancient educational thought and practice.