The skills, knowledge, and credentials obtained through education are widely believed to be connected to positive occupational and economic outcomes. In recent decades, considerable attention has been devoted to improving educational attainment levels of students with disabilities. This report discusses policies aiming to promote educational attainment and examines trends in high school graduation and college enrollment for students with disabilities. It begins with a discussion of the laws related to the education of students with disabilities at the secondary and postsecondary levels. Subsequent sections discuss the existing data on transition-aged students with disabilities, what is currently known about such students, and federal legislation and other factors that may have contributed to changes in students with disabilities' high school graduation rates and postsecondary enrollment over time. The report offers a brief overview of what is currently known about the U.S. population of students with disabilities in secondary and postsecondary education. It focuses on data gathered in conjunction with federal programs and federally funded studies of nationally representative samples of students with disabilities. The report provides an overview of the education and civil rights laws that aim to support students with disabilities as they work toward completing high school and potentially transition into further educational pursuits.