Introduction. The basis of preventive activities in pediatrics is medical examination, based on active dynamic monitoring of sick and healthy children. An important part of medical examination is preventive examinations, which are carried out with the aim of timely detection of deviations in the health status in children and the management of necessary treatment, preventive and health measures. Purpose of the study: based on the results of a dynamic 10-year observation, present the data on the health status of a single cohort of schoolchildren to update the main preventive areas for children’s practice over schooling process. Materials and methods. The study was conducted on the basis of a study of the health status of four hundred thirty seven schoolchildren at different stages of schooling (before entering school, at the end of first grade, during the transition to subject education and at the end of school education), according to a single protocol, on one sample and a single methodology with sequential multiple registration of selected indices of the health status in schoolchildren and annual analysis over a period of 10 years. Results. An analysis of the distribution of those examined cases by membership in health groups clearly demonstrated a decrease in the number of children in health groups I and II and an increase in schoolchildren in health groups III and IV. A dynamic assessment of diagnosed pathological conditions in their compliance with a certain ICD-10 class over a 10-year observation period revealed an increase in the proportion of schoolchildren suffering from diseases of the musculoskeletal system, the organ of vision, cardio- and endocrinopathies. Research limitations.The study has regional (Krasnoyarsk Territory) limitations and concerns 6 to 17 year children. Conclusion. The data obtained established the possibilities of early diagnosis in risk groups, and preventive measures aimed at developing healthy lifestyle skills in schoolchildren and their parents within the framework of priority national projects in Russia.