I did the same thing. I was raised by a strict Black Baptist mother...real "spare the rod, spoil the child" Umm, no.
The problem is those kids have to live in the world and they'll see and learn things.
By the way, how does this work with the separation of church and state? How can public schools get away with this? I need to research this. I was a lawyer, but I was a lawyer in Canada, so I'm not as well versed in American law as I should be.