Executive Overview • This article determines the frequency and outcomes of published court decisions under the IDEA for students from pre-K through grade 12, starting in January 1998 and ending in October 2012. • The frequency of these decisions trended upward during the 15-year period, particularly during the most recent five-year interval. • The conclusive outcomes favored districts on a 3:1 basis both overall and on relatively consistent longitudinal basis; however, the intermediate outcomes partially ameliorated this pronounced pro-district tendency. • The Second Circuit region (New York, Vermont, and Connecticut) had the highest volume of cases, and the Tenth Circuit (Colorado, Kansas, New Mexico, Oklahoma, Utah, and Wyoming) had the lowest. • The Eighth Circuit (North Dakota, South Dakota, Nevada, Minnesota, Iowa, Missouri, and Arkansas), was the leader in the pro-district outcomes, and the D.C. Circuit was the most district-favorable circuit court region.