Great question-I am not Jewish, but I worked at a Jewish school for many years and I always received very generous gifts around the holidays from people who did not celebrate Christmas. We always tip teachers, mailmen, etc., because, while they certainly did choose these careers, they are performing a service from which we benefit. A small tip from us once a year hardly seems excessive given that all of these are tough jobs. My kid's teacher has to be with him all day every day-that's hard!! Mailmen and garbagemen often have to work in sub zero temperatures, and, while they shouldn't expect a tip, it's nice to think of them. It's also important to teach your children to appreciate those around them, particularly those who do jobs which benefit them. Happy Holidays!!