The aim of this text is to present the contribution of the Problem Based Learning (PBL) methodology as a learning strategy for the training of students capable of critical thinking, collective social action and social engagement. After analysing the role of Education in the emergence of the prospect of social change, the research highlights that in the LMP students experience politics, develop critical sense and understand the world. By solving problems, which are microcosms of real life, the pupil takes a position of refusal to any fatalistic ideology of a reality that he knows to be indeterminate and capable of being transformed through his or her own inclusion in the world.