The purpose of this action research project was to gain an understanding of, and to mobilise the voices of diverse young people enrolled in a Portuguese secondary school. A case study methodology, in conjunction with action research methodology, was used for this study. The action research data indicated that projects conceived throughout the study were successful in mobilising the voices of 14 young secondary school students in decision-making processes. The young people engaged democratically, made informed decisions about themselves and their peers, managed conflicts, and reinforced the importance of interpersonal relationships. These changes took place at the individual, as well as group levels.