I never got any lessons in using a fire extinguisher until I was working.
Many fire drills, no actual fires in grades 1-12.
There were a few fires in the college dormitory (some deliberately set)
Well, the moral here is:
o If there's a fire set, put it out with an available fire extinguisher.
o If there is a shooter loose, disable him with an available firearm.
Access to the related extinguishing devices kind of discourages arsonists and shooters.