In PBL, the students self-direct the learning process which is more problem-directed than teacher-directed (Sockalingam, Rotgans and Schmidt, 2010). In fact, PBL was developed originally for adults, in order to train doctors in how to approach and solve medical problems (Delisle, 1997). In 1969, a first group of 20 medical students arrived at McMaster University and were engaged in a process of learning and instruction which was called PBL (Schmidt et al., 2009). The approach was used first in medical education and, since then, it has been used in various fields such as the law; the economy; and management and social sciences (Demirel and Turan, 2010).