I always carried a knife to school. Sometimes my teachers would borrow it when they needed it. Fortunately I spent most of the years that I wasn't homeschooled at private Christian schools. My teachers knew and trusted me, and it was never an issue.
One time a teacher asked if anyone had scissors or something to help him cut open some packages, and he was offered about 10 knives from around the classroom. Hehe.
Oh, and no one was ever stabbed or attacked, though sometimes the teachers couldn't figure out how to close the locked blade.
How hard would it be to get the powers that be to adapt Luke 22:35-38 into an official requirement?
Jesus wrote:
Then Jesus asked them, "When I sent you without purse, bag or sandals, did you lack anything?" "Nothing," they answered. He said to them, "But now if you have a purse, take it, and also a bag; and if you don't have a sword, sell your cloak and buy one. It is written: `And he was numbered with the transgressors' ; and I tell you that this must be fulfilled in me. Yes, what is written about me is reaching its fulfillment." The disciples said, "See, Lord, here are two swords." "That is enough," he replied.
"When I was a kid, people who did wrong were punished, restricted, and forbidden. Now, when someone does wrong, all of the rest of us are punished, restricted, and forbidden. The one who did the wrong is counselled and "understood" and fed ice cream." - speedsix