This is the 22nd report by the National Center on Educational Outcomes (NCEO) that describes how states publicly report assessment data for students with disabilities in K-12 schools in the United States. The purpose of this report is to examine the extent to which states reported 2018-19 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 the Individuals with Disabilities Education Act (IDEA). 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. [For the 2017-18 report, see ED613027.]