Generally in the US any time there's a bus full of kids, there's an authority figure that's not a teacher in charge of discipline. Sometimes it's the driver, so

Generally in the US any time there's a bus full of kids, there's an authority figure that's not a teacher in charge of discipline. Sometimes it's the driver, sometimes a separate monitor. At least when I was in grade school 15-20 years ago those people were generally not well respected by students, as they couldn't mete out real consequences for misbehavior.