The nature of the American academic workforce has fundamentally shifted over the past several decades. Whereas full-time tenured and tenure-track faculty were once the norm, more than two-thirds of the professoriate in non-profit postsecondary education is now comprised of non-tenure-track faculty. New hires across all institutional types are now largely contingent and this number will continue to grow unless trends change. This paper presents conceptual diagrams that show interactions of non-tenure-track policies and practices on student learning outcomes. [For the full report, "The Changing Faculty and Student Success: Review of Selected Policies and Practices and Connections to Student Learning," see ED532268.]