@fify-- That's a good question. I'm not sure but I think that they are the same. Some schools call it a school principal or a staff principal, others call it a principal's secretary. I guess technically a principal's secretary would be someone who takes care of clerical work only for the principal. But a school secretary is someone that works for the principal as well as other staff in the school. So if a school has both of these positions, then I would assume that the school secretary deals with general staff and student related work.