“…In spite of the fact that cooperative learning has received remarkable attention in instructional community, empirical studies conducted on its effectiveness reveal mixed findings. On the one hand, research findings (e.g., Adeyemi, 2008;Chang & Mao, 1999;Fuchs, Fuchs, Mathes, & Simmons, 1997;Macloughlin, 2009: Onwuegbuzie, Collins & Jiao, 2009Slavin, 1991;Vasileiadou, 2009) show that cooperative learning enhances academic performance and acquisition of social or/and psychosocial skills. On the other hand, studies conducted on effectiveness of cooperative learning (e.g., Gillies & Boyle 2010;Karababa, 2009;Krause, Stark & Mandl 2009) indicate that cooperative learning does not enhance academic performance.…”