1. Content: Compared with the second edition, the third edition has added some chapters and contents, including "adolescent mental health problems", "education and intervention for children with learning difficulties" and "parent-child relationship and academic performance". At the same time, the third edition also revised and updated the original chapters, adding more cases and practical experience.

2. Structure: Compared with the second edition, the third edition has adjusted the chapter order and the number of articles, deleted or merged some contents, and added some new articles. At the same time, the third edition of School Psychology has also expanded the coverage of knowledge points, including some cutting-edge theories and research results, making it more comprehensive and in-depth.