Put it at the exact cut between a lesson scene and the next activity, with a bell ding just before it as a warning cue, then let the next scene start cleanly after the bell. It also works before a classroom announcement or a lunch-break montage.
À propos de ce son
This is a clear school bell ringing for about three and a half seconds, the familiar metallic chime heard at the start and end of lessons. It feels sharp, familiar and slightly urgent, like the moment everyone packs up, stands and heads for the door. It works as a quick signal that time is up and something is about to change.