Paul Reville, former Massachusetts education secretary, joined Boston Public Radio on Thursday to speak about a U.S. Supreme Court case involving the separation of church and state. A law in Montana currently prevents public funds going to religious schools, but is being challenged in Espinoza v. Montana Department of Revenue.

"We are revisiting, at the Supreme Court level, the degree to which private religious schools should qualify to get aid from the federal government," Reville said. "There's a decent chance that this may open floodgates to private voucher assistance going directly to religious schools."

Reville is a professor at Harvard University’s Graduate School of Education, where he also runs the Education Redesign Lab. His latest book, co-authored with Elaine Weiss, is Broader, Bolder, Better: How Schools and Communities Help Students Overcome the Disadvantages of Poverty.