Conflict is an inevitable aspect of human experience, but it can become an opportunity for growth and personal development if managed constructively. This article explores the effectiveness of the cooperation council, a pedagogical tool proposed by Célestin Freinet and adapted by Danielle Jasmin, in improving conflict management, prosocial skills, and classroom climate. The research was conducted in a fifth-grade primary school class, using a mixed methods research approach. The results suggest an improvement in students’ ability to manage conflicts and in prosocial interactions, highlighting the benefits of the cooperation council in fostering a positive and collaborative learning environment.