A school bell is a signaling device used in educational institutions to indicate the start and end of classes. Typically located in a prominent area, such as the main hallway or outside the school, it helps maintain a structured schedule for students and teachers. The sound of the bell can vary, with some schools using electronic chimes while others may have traditional bells. The bell serves as a cue for students to transition between lessons, ensuring that everyone is aware of the time. In addition to marking class periods, it may also signal breaks, lunch, and the end of the school day, contributing to the overall organization of the school environment.