If parents and school districts disagree over special education services provided under the Individuals with Disabilities Education Act, either party has options to resolve the dispute, such as mediation or filing a due process complaint. The Government Accountability Office (GAO) was asked to review parents’ use of IDEA dispute resolution options. GAO's findings are detailed in its November 2019 report entitled Special Education: IDEA Dispute Resolution Activity in Selected States Varied Based on School Districts' Characteristics (GAO-20-22).
The full report is 58 pages long. There is also a 1-page Highlights summary available. Read more about the study and access the report and/or the Highlights here.