text: One reason I think the way I do is because if a student for some reason is to have an accident or some kind of emergency and they do not have their cell phone on them or at school then it could be every difficult to contact their parents. If their parents do not have the school's number then it shall be very difficult to contact them. However, if this student were to have a cell phone then their parent(s) or guardian(s) will have their child's number saved into their phone so it would be very resourceful.