(CNN) - In a ruling that could reverberate nationwide, the Indiana Supreme Court upheld the state's voucher program, which gives poor and middle class families public funds to help pay for private school tuition, including religious schools.
Indiana has the broadest school voucher program available to a range of incomes, critics say, and could set a precedent as other states seek ways to expand such programs.
Supporters say it gives families without financial means more options on where to educate their children.
However, opponents of the Indiana program had sued to block it, describing it as unconstitutional and saying it takes money from public schools.
Teresa Meredith, the vice president of the Indiana State Teachers Association and one of the plaintiffs, said she was "very disappointed in the ruling."
As many as 9,000 students statewide are part of the voucher program and more than 80% use the funds to go to religious schools, according to Meredith.
But in its unanimous 5-0 ruling, the Supreme Court said that was not an issue.
It said it did not matter that funds had been directed to religious schools as long as the state was not directly funding the education. The tuition, the court said, was being funded by the parents who chose to pay it with their vouchers.
"Whether the Indiana program is wise educational or public policy is not a consideration," Chief Justice Brent Dickson wrote. The public funds "do not directly benefit religious schools but rather directly benefit lower-income families with school children."