A coalition of Florida groups and individual plaintiffs filed a lawsuit Thursday challenging the constitutionality of a de facto school voucher program that serves tens of thousands of children.

The Florida Education Association, the Florida School Boards Association, the Florida NAACP and other groups are challenging what is known as the Florida Tax Credit Scholarship Program.

The program offers tax credits to companies contributing money that ultimately is used to pay for children to attend private schools.

The lawsuit contends the program violates part of the Florida Constitution that says it is a “paramount duty of the state” to make adequate provision for a “uniform, efficient, safe, secure and high-quality system of free public schools.”

Also, the lawsuit takes issue with the program sending money to religious schools.