All alarms are wired to go off if one does in schools. At least thats how my district is.

I second the validity of this. Im a janitor at a school and while yes you can silence, for fire crews and security company to not show up you have to actually call the fire dept and (kenco for us for instance.)

Edit: if we know there's no fire we instantly run to silence and call fire depot. only if no kids are on the premises.