This document proposes a theoretical model to understand how social networks impact learning and performance. It analyzes data from an online project management course involving 36 professionals. The model is based on social learning and social network theories. It finds that social learning, rather than direct performance, is influenced by social network properties like structure, relations and position. A measure of "Content Richness" is introduced to measure engagement through message content analysis. Results indicate social network properties are correlated with social learning measures, which indirectly impact performance. The model could help educators enhance learning analytics and outcomes.