The Problem-Based Learning (PBL) (Duch et al., 2001), consists on valorising the problems of the "real world"
in the educational process, in order to facilitate the development of critical thinking and of students’ solving
abilities, and the assimilation of the fundamental concepts for the different study disciplines.
Using PBL in the instruction demarche, the teacher assumes the role of coach for his students, orienting them in
the research activity, stimulating their interest for an authentic and relevant learning.
The PBL model, proposed by the Academy of Sciences and Mathematics from Illinois, involves the following
stages and sub-stages: