In 1952, the United States Supreme Court approved Release-Time Christian Education programs with these words:
It is essential that constitutional guidelines be adhered to in the establishment and practice of a Released Time program. The principles, as set out in the First Amendment to the U.S. Constitution, provide that Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof. The first phrase – the Establishment Clause – requires the government to not entangle itself with religious practices, or establish or support religion in any way; the government is to keep itself separate from religion. The second phrase – the Free Exercise Clause – mandates that government be neutral, not antagonistic, to religion. Government must accommodate religion.
Major points to determine the legality of a Released Time program:
Classes are to be held off of school property