text: they might for get their gym clothes, so they'll wait until a free time to call their parents to drop their clothes off. Example two, a student might get hurt at school and no one is around, all they'll have to do is pull out their cell phones and call their parents . Example three, A student might stay after school for tryout's or something and didn't tell their parents. Instead of having their parent worried sick about them they can call them and tell them where they are.