The ringing of a school bell announces important times to a school’s students and staff, such as marking the beginnings and ends of the school day, classes, and breaks.
The concept of the school bell has come from jails. The practice started during war time when imprisoned soldiers were kept in make shift prisons, the bell was a way to send out a fall-in message.
In 2010, an Islamic militant group that controls large parts of Somalia–ordered school bells banned as they sounded too similar to church bells.
Schools & factories with hearing impaired pupils/employees use alternative signaling methods, for example, lights and beacons that illuminate when the public address or school bell is sounding
Teachers from 100 years ago followed their own pace for beginning and ending the day. Unique hand bells, desk bells, and larger bells rung by the pull of a rope could all be ordered from teachers’ catalogs.