“…Rather, we were interested primarily in assessing the potential of PBL in mainstreamed classrooms and, more specifically, in providing thick description of Sean's and his group's interactions. However, cooperative learning is largely advocated for mainstreamed classrooms because it is said to increase the motivation, peer acceptance, academic achievement, and social skills of students with special needs (Johnson & Johnson, 2002;King-Sears, 1997;Putnam, 1998a;Slavin, 1983;Waldron & Van Zandt Allen, 1999). Sean perceived that participating in the unit allowed him to gain confidence to speak in front of others, and noted that he would like to participate in another PBL unit.…”