“…For instance, effective tutors in PBL are able to enhance discussion and be part of group (Goldie, Schwartz & Morrison, 2000). Some studies articulated a good tutor's characteristics including able to support critical thinking of student with problems (Das, Mpofu, Hasan & Stewart, 2002), facilitating discussion (Felder, 1996), eliminating conflicts (Hitchcock & Helen-Zoi, 2000), focusing on student's learning instruction (De Grave, Dolmans & van der Vleuten, 1999), enhancing learning process (Pinto, Rendas & Gamboa, 2001;Reznich & Werner, 2004), and acknowledging when and how intervening students (Maudsley, 2002;Haith-Cooper, 2000). Tutor's roles are significant according to Fay, Selz, and Johnson (2005) expressing that SCL strategy will be successful only if students in this approach adopt a new way and more vocal, organized, and confident.…”