I cringe when I hear schools talking about being under ‘lockdown’ - that’s a prison term. The again with union goons doing the ‘teaching’ (if you can call a system that can’t teach kids to read, ‘teaching’) it might be the right term.
If your look at the most recently build schools they have almost no windows, very few doors, and are surrounded by chain link fences. If that is not a type of prison I don’t know what is.