Conflicts and confrontations between students are a key-feature of school life. Especially in recent years, both the scientific and the educational community are particularly sensitive to bullying issues in the school context. Peer mediation (or school mediation) is an alternative way to manage conflicts at school. A critical evaluation of this practice is attempted, as well as its contribution to the formation of a positive attitude in school and to the decreasing of school-bullying incidents. For this purpose, school extracurricular programmes can be planned. The application of relevant programmes at school can be facilitated by systemic modelling that may provide a useful conceptual tool for organizing similar interventions. The overall approach is exemplified by the implementation of Health Education programmes, as they are conducted at the Greek secondary education in the context of educational counselling psychology interventions
