We didn't have carpet squares or vending machines. But here are a couple of things:
Say the Pledge of Allegience. Complete, with the "one nation under God" part.
Pray. It was generally expected in the parochial schools, but we got to say The Lord's Prayer in the Public Schools, too. When Kennedy was shot (John, not Bobby), a nun stuck her head in the door and informed us. We immediately stopped what we were doing and prayed for the President.
Bring toy guns to school and play cops and robbers and "Army" at recess.
If you didn't have a toy gun, you could find a stick, or even hold your hand with your fingers pointed to look like a pistol and say things like "Bang! Bang!" I got you!
Call someone a "faggot", even if they weren't, without having four news vans show up in front of the school and ending up on the six o'clock news.
Smoke. That's right. The High School I graduated from permitted upperclassmen (juniors and seniors) to have a cigarette in designated smoking areas. It was a suspension offense in the public schools.