Supreme Court justices appeared ready Wednesday to clarify and strengthen the rights of the nation’s 6.7 million children with disabilities, perhaps by requiring public schools to offer a special education program that will ensure they can make significant progress.

The case of a Colorado boy with autism, Endrew F. vs. Douglas County School District, could have a far-reaching impact on millions of children and their parents as well as the budgets of school districts nationwide.

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Stanford law professor Jeffrey Fisher, representing the parents, said the Supreme Court should reject the minimally adequate standard set by the 10th Circuit and instead say that children with disabilities have a right to make significant progress at school.