Yup, elementary school I went to had bells… Two Legrand bells on the outside (the school had two yards) encased in a wood box), and a bunch of unknown 240V bells in the corridors.
As a matter of fact, I have one of the older bells that was installed there and subsequently taken down when the school was renovated after a fire ravaged the topmost floor.
Junior high used Aviss DS01 sounders on continuous tone (and these sounders have a weird quirk: when they go off in NFS32001/AFNOR tone, they sound in continuous for a split second, so each time there was a fire drill we’d get a good scare by the DS01s as they went off a second time in continuous!) those were replaced by a Bodet chime/clock system in 2019.
High school on the other hand, there was a single Legrand 240V bell (or it could’ve been a Honeywell Friedland “Master Bell”, I don’t remember) that barely went off but was still deafeningly loud.