"Hey Art Teacher" is something I hear a lot!  Not only from new students and new kindergarteners but also from students who have left (aged out) my art room.  Some people get upset when students refer to them as something other than their name.  I do not.  Simply because every single time that a student has said "Hey Art Teacher" or "You used to be my art teacher" it is always always always said with a smile!  To me-that genuine smile- is worth so much more than a student remembering my name-it is a student remembering.....so very many things!