Reporting assessment results to the public has been a part of the Elementary and Secondary Education Act (ESEA) since the early 1990s, with the reauthorization of ESEA as the Improving America's Schools Act in 1994. In 1997, the Individuals with Disabilities Education Act (IDEA) included this requirement to make sure that assessment participation and performance were reported publicly for students with disabilities who received special education services. The purpose of this report is to examine the extent to which states reported 2015-16 assessment data for students with disabilities "to the public with the same frequency and in the same detail as it reports on the assessment of nondisabled children," as required by IDEA (Wiley, Thurlow, & Klein, 2005). It also describes how states report assessment participation and performance data to the public online. It summarizes these data for grades 4 and 8, and high school, with additional analyses that focus on average performance gaps across years. The report also summarizes the extent to which states report participation and performance for English Learners (ELs) with disabilities and examines public reporting of accommodations.