Social capital refers to the benefits that accrue from social connections and networks. Most frequently linked with the work of Bourdieu and Putnam, the concept has found expression in the disciplines of sociology, political science and economics. In this chapter we explore the application of social capital to tertiary education practices. Specifically we examine the ways in which bonding, bridging and linking social capital can be applied to the common academic practices of student peer mentoring and staff peer observation of teaching. Findings from a range of studies show that the explicit development of trust, reciprocity, information sharing and cooperation in student and staff networks can improve learning experiences and enhance belonging. A social capital analysis of these partnerships suggests that investing in these types of partnerships amongst students and staff offers scalable, sustainable and costeffective opportunities to strengthen tertiary education.