On March 7, a Federal District Court judge overturned the Education Department’s (ED) decision to delay implementation of the 2016 significant disproportionality rule because it was “arbitrary and capricious” and the department “failed to provide a reasoned explanation” for its decision. The requirement for states and school districts to collect and report data on significant disproportionality, and take certain action if it is found, was added to the Individuals with Disabilities Education Act (IDEA) in 2004. However, since that time, few states and school districts have reported any such significant disproportionality. In response to this problem, documented in a 2013 study by the Government Accountability Office (GAO), the Department of Education issued regulations in 2016 to require a standard methodology to calculate significant disproportionality on the basis of race in identification, placement, and discipline. In 2018, the ED announced it would delay implementation of the rule. The Arc is pleased with the court ruling, which will ensure states and school districts move forward with implementation.