Bible Lessons at the Lunch Bell: Released Time programs began in 1914 and allows public school students to attend privately sponsored religious classes during school time. Though the U.S. Supreme Court ruled public schools cannot endorse any religion or try to convert students during class, it upheld the constitutionality of released time in 1952 with certain limits: Released time classes cannot take place on public school property or involve public school teachers or public funds. School officials can also choose not to accommodate a released time program, and most states require parental permission for students to attend classes.