The Supreme Court agreed Friday to decide whether states may reject religious charter schools from receiving public funding, agreeing to hear arguments in an appeal out of Oklahoma involving the first such school in the nation.

A group of 19 states as well as several religious liberty scholars also weighed in on the side of the Catholic charity.

The Oklahoma Supreme Court agreed with the state of Oklahoma and blocked the opening of St. Isidore of Seville Catholic Virtual School, but recently, the U.S. Supreme Court agreed to hear the case. The school’s argument is essentially that the establishment clause,

For years, the Supreme Court has been expanding the boundaries of government aid to religious schools. St. Isidore’s case pushes the debate into new territory.