Nearly four decades have passed since the Individuals with Disabilities Education Act (IDEA) ensured access to public education for students with disabilities in the United States. During the years following its adoption, there was growing recognition that to lead productive and fulfilling lives as adults, many students need support in the transition from secondary school to post-high school environments. As a result, several reauthorizations of IDEA have emphasized transition planning in helping students with disabilities to obtain employment, pursue postsecondary education and training, and live more independently. Despite the efforts of policymakers and practitioners, a gap remains between post-high school outcomes of students with disabilities and outcomes for other students. To help close that gap, this report reviews the research literature on programs (strategies, interventions, or sets of services) designed to help students with disabilities make transitions.  Available at http://ies.ed.gov/pubsearch/pubsinfo.asp?pubid=NCEE20134011.