As one form of small group learning, team-based learning's (TBL's) unique sequence of individual and group work with immediate feedback enables and encourages students to engage course content and each other in remarkable ways. Specifically, TBL creates an environment where students can fulfill their human need to belong in the process of negotiating and mastering course content with their teammates. What sets TBL apart from other forms of small group learning is its accountability structure--a rhythm of moments in which students' social and intellectual experiences of the classroom become interlocked and amplified. This chapter shows what these moments look like and how students' social interaction in those moments cultivates their abilities to learn from and with one another.