The results of monitoring activities to prevent aggressive behavior of students in state schools of various regions of the Russian Federation are presented. The purpose of the monitoring was to gather information on topical issues related to aggressive behavior and the system of preventive measures. The study was attended by heads of 81 schools from 40 Russian regions. The research tool was a questionnaire developed by the authors, consisting of 137 questions. The survey was conducted in 2021. The results of the study showed that the problem of aggression among students, manifested in various forms – verbal, physical, social, cyber aggression, including conflicts and bullying, as well as autoaggressive behavior, is of high relevance. In addition, the data show that there is a lack of systematics in the preventive activities implemented in schools, both in the field of the forms of work used, and in the choice of the target audience, the number of specialists involved. Based on the results, a research and application approach is proposed to support and develop systemic prevention work in schools.