This case study investigated the development of group cognition by tracing the change in mathematical discourse of a team of three middle-school students as they worked on a construction problem within a virtual collaborative dynamic geometry environment. Sfard's commognitive framework was employed to examine how the student team's word choice,…

Though teacher educators nationwide are considering ways to provide urban placements for pre-service teachers (PSTs), little research has examined how PSTs experience placements in schools operated by charter management organizations (CMOs). This study considers CMOs--which often hold particular instructional and classroom management…