School prayer
When I was in elementary school, right after WWII, we started each morning with a Bible reading (nearly always from Psalms), the Lord's Prayer, and the Pledge of Allegiance. Nobody every paid any attention to the reading and the recitations of the LP and PA were totally mechanical once you learned the pledge (back in those days most children, or at least the ones I knew, already knew the Lord's Prayer by hear by age 3 at latest). This is why I am personally opposed to religious exercises in school -- it's hard to imagine very many students taking them seriously (maybe a few from very religious families) and I don't think it's a good thing to breed contempt for such things in the young. As to the Pledge, that was dropped after a suit was brought in the Supreme Court, and good thing.