A Web 2.0 environment that is coupled with emerging multimodal interaction tools can have considerable influence on team learning outcomes. Today, technologies supporting social networking, collective intelligence, emotional interaction, and virtual communication are introducing new forms of collaboration that are profoundly impacting education. In this study, an empirical analysis was conducted on a Web 2.0 learning space designed to promote and support project-based group learning. Three different group reflection (GR) methods (i.e., self-reflection, GR, and instructor-supported reflection) were implemented for a micro community of undergraduate students completing a team project. Findings from this study suggest that promoting and supporting "deep learning" through GR is essential for team project learning in a Web-based community. In addition, effective instructor intervention is a crucial component leading to better group performance. In terms of group learning evaluation rubrics, structural equation modeling revealed that the level of activeness in online contributions may not be as important as the evidence of collective reflection and critical thinking in team learning scenarios. (Contains 2 tables and 3 figures.)