Jamo,
We're a suburban farm community, Raymore-Peculiar School District, so pocket knives, picks, shovels can be found in pickups and pockets on quite a few of the boys. I'm pretty active in town and can't remember a misused weapons problem at any of the schools. Our official policy is below but unless a kid is threatening with the pocket knife most of the time they're told to go put it in their vehicle. Now the machine guns and explosive devices mentioned in the policy are another thing. Notice they can bring an unloaded 1860 Colt Army .44 to school for "instructional purposes".
I imagine California might be different but back here our biggest problem is getting sleepy little school girls to stop at the stop signs coming onto school road from the gravel roads. Hell we're going to have to put up flashing signs now.
The policy must provide for the suspension of not less than one year or expulsion for a student who brings a weapon to school. The term "school" includes, but is not limited to, a school playground, school parking lot, school bus, or a school activity on or off school property. The term "weapon" must be defined in the policy and shall mean "firearm" as defined under 18 U.S.C. 921 and must include a blackjack, concealable firearm, an explosive weapon, a firearm, a firearm silencer, a gas gun, a knife, knuckles, a machine gun, a projectile weapon, a rifle, a shotgun, a spring gun, and a switchblade knife. The policy may allow an unloaded Civil War weapon to be brought
upon school grounds for instructional purposes. The superintendent may modify a weapons suspension on a case-by-case basis, and a district may provide alternative education to a student who violates the weapon provision.