No classes. It began with kindergarten. You started out the day with a prayer, you had lunch with a prayer, you might be counseled by a teacher about Jesus. It was an ongoing barrage, all done with good intent. Fairly innocuous to most, but if you were Jewish.... a bit of a different story. But that was ok, because it was always in the kid's best interest. In third grade I watched as my best friend was asked, by our loving and caring teacher for whom I had something of a crush, if he wanted to go to hell. Scared the shit out of him, but it was with the best of intentions so it was fine.
So I don't trust your good intentions. I don't trust your classes. I don't trust that they won't give more attention to one religion and ignore others. I don't trust the teachers who will teach the classes. At the college level? That's fine. Now your dealing with adults. In a public school where you have children who have no choice and aren't equipped to challenge, no.