In the present paper the author proposes an action model of intervention for the prevention of the phenomenon of bullying at school that has the objective to create, in a school context, a policy anti-bullying which, starting from the experience of peer education can give voice to the thought "positive" of young people and help to involve adults in a process of auto reflectivity than product, showing them the skills of youth and their mode of communication and involving the local community in terms of spreading the message of collaboration and cooperation. This also allows to create an intervention that challenge the linear model of the systems of prevention and treatment that focuses on the support to the "bully designated" and "bulling victim" by moving the intervention on systemic dimension of context as a matrix of meanings that activate some behaviors inhibiting others.
Keywords: Counseling, systemic epistemology, bulling, cyberbulling, prevention, school.