Learning records advocate the combination of in-class and out-of-class, and the combination of textbook learning and practical training, which not only expands the 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 ("thinking after enlightenment") and gradual teaching ("teaching without rules is called grandchildren"), and emphasize stimulating students' intrinsic learning motivation and cultivating 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. The teaching principles, teaching principles and methods, and the idea of respecting teachers and attaching importance to Taoism put forward on the basis of summarizing the teaching experience of Confucianism in pre-Qin Dynasty have had a great impact on the development of pedagogy and psychology in China, and are one of the precious educational heritages in China and even in the world. Xue Ji is based on Da Xue and The Doctrine of the Mean.