The article is dedicated to measuring the effectiveness of preventive activities among a selected group of the population, namely among children and youth aged 13 to 18 in primary and secondary schools and other educational facilities. Determining the effectiveness of preventive activities was carried out using a questionnaire survey, which was distributed among survey subjects before and after the end of the preventive activity. Based on the collected data, the effectiveness of preventive activities was evaluated, taking into account the individual's answers.
