This document discusses social interaction and group dynamics in collaborative learning. It begins by defining collaborative learning and outlining the lecture. It then explores the educational and social psychological dimensions of collaborative learning. Specifically, it examines how social interaction affects individual and group learning outcomes. It also analyzes factors that influence group work, such as group formation, cohesion, roles and interdependence. Finally, it discusses challenges in group work like social loafing and provides strategies to enhance positive group processes and avoid free-riding.