“…Students interpret, gather new information, identify possible solution and method, develop problem solving skill, collaborate, discuss and compare ideas to come up with their conclusion. The PBL developed at McMaster University four decades ago (Barrows & Tamblyn, 1976, 1980, has grown as an interactive instructional strategy in medicine, engineering, and education (Edens, 2000;Edwards & Hammer, 2004;Eldredge, 2004;Fink etal., 2002;Jones, 2006;Şahin, 2009a;Selcuk & Şahin, 2008;Stonyer & Marshall, 2002). In addition, PBL has equally been used in physical science subjects like physics (Duch, 1996;Iroegbu, 1998;Raine & Collett, 2003;Şahin, 2007;Şahin, 2009b;Şahin & Yörek, 2009).…”