I doubt that. I moved around a lot as a kid, so I went to at least eight different public schools from Alabama to Washington. One school was structurally condemned while I attended it. Some places had bullying, and sometimes a couple of people fought, but never with weapons, and there was never an injury severe enough to require medical attention.
I also know several high school teachers and the worst things they've complained about are disruptive/stupid students, not violence. And my friends who are parents would never send their kids to a school that had incidents like the ones I linked to. I think this sort of violence is limited to a small fraction of schools/districts.
> I think this sort of violence is limited to a small fraction of schools/districts.
No, definitely not. I went to a decently-well-ranked suburban school district, and still witnessed violent incidents... no weapon used, but still multiple cases where the victim got a concussion. And there were arrests, a gun found in a kid's locker, etc. This stuff was unfortunately relatively normal, at least in the 90s. Not quite as often as at the school in the article, but still.
I went to a very small rural school, and remember the big deal made when the administration asked the seniors to take their rifles out of the rear windows while on school property.
There were fights, but no one was ever harmed with a weapon to my memory.