The research aimed at identifying membership problems of school activity groups from the supervisory point of view, and
determining the roles of professional supervision in helping social workers address these problems. The study was conducted on 90 supervisors specialized in group social work during May 2017. The research, as a descriptive study, applied the social survey method on an organized sample, using a questionnaire to collect data. The research identified seven problems related to membership of school activity groups and their causes, from the supervisory point of view.
It also identified ten detailed tasks that supervision could carry out to help group social workers address membership problems, using five supervision methods and seven supervisory skills. The study also found that male supervisors displayed higher performance than female supervisors and there is positive correlation between the supervisors' age and performance in roles. In addition, there is a positive correlation between the number of years of experience and educational qualifications of supervisors and their performance. The research results could benefit practitioners and supervisors in the school field at the preparatory and secondary level in Egypt.