The aim of the research Monitoring the process of the development and implementation of a preventive sociopedagogical intervention in a school setting was to present the process of creating and monitoring the quality of implementation of a preventive sociopedagogical intervention in the school environment. The specific objectives of this paper were to determine the quality of the implementation process of the observed intervention with regard to various aspects of implementation and to create and describe recommendations for improvement of this preventive sociopedagogical intervention in accordance with the predictors of effective implementation. For the purpose of conducting this research, i.e. for monitoring the implementation process, methods used were interview, observation and focus groups. The authors of the program, experts working in the Amazonas association, were in charge of the implementation of the prevention program, while a teacher and a professional associate of the school participated in the implementation process. The results of the research indicate that the quality of the implementation process of the preventive program "Ritam razreda“ differs with regard to different aspects of implementation. Namely, program differentiation, program reach and participant responsiveness of the beneficiaries are the aspects of implementation that are met, while the aspects of monitoring of control/comparison conditions and adaption were not monitored. Aspects of fidelity, dosage and quality were violated with regard to the changes and deviations in the structure and content of individual workshops. In accordance with the predictors of effective implementation, it was determined that there is room for improvement of the preventive program "Ritam razreda". Consequentially, the following recommendations were created: to make the program theoretically and scientifically based, to base the goals on an assessment of needs and take into account the harmonization of goals and activities, to better plan the time of activities and workshops, to provide reflection after central activities, to evaluate the prevention program, to educate implementers on how to implement activities from the prevention program, ensure a continuous implementation of the prevention program, work on the comprehensiveness of the prevention program, provide incentive administrative support, create a manual for the prevention program "Ritam razreda“, take into account other interventions in the system and provide ongoing consultation and guidance. The results of this research indicate the importance of applying predictors for the quality implementation of prevention programs and provide valuable information for the improvement of the program and its future expansion.