This literature review aims to examine social-emotional learning in schools, and more specifically, at the secondary level. The review explains the importance of SEL at the secondary level and its continuation from preschool through high school. Evidence-based secondary SEL programs are presented, and research, including several meta-analyses, are shared that outline the benefits and disadvantages of social-emotional learning programs. Mandated SEL standards at the federal and state levels are covered, as well as policies and laws that enforce and support SEL. An analysis of the published literature on SEL programs at the secondary level suggests they lead to improved academics, negative behavior, saved tax-payer dollars, and graduation rates.