While Gorsuch was testifying, the Supreme Court unanimously said he was wrong

All eight justices rejected Gorsuch’s approach. IDEA, Chief Justice Roberts wrote, “is markedly more demanding than the ‘merely more than de minimis’ test applied by the Tenth Circuit.” Indeed, Roberts added, Gorsuch’s approach would effectively strip many disabled students of their right to an education. Roberts went on:When all is said and done, a student offered an educational program providing “merely more than de minimis” progress from year to year can hardly be said to have been offered an education at all. For children with disabilities, receiving instruction that aims so low would be tantamount to “sitting idly . . . awaiting the time when they were old enough to ‘drop out.’”

Source: While Gorsuch was testifying, the Supreme Court unanimously said he was wrong