Schoolmaster /(?)/

School·mas·ter

Schoolmaster

n.
  1. The man who presides over and teaches a school; a male teacher of a school.
    Let the soldier be abroad if he will; he can do nothing in this age. There is another personage abroad, -- a person less imposing, -- in the eyes of some, perhaps, insignificant. The schoolmaster is abroad; and I trust to him, armed with his primer, against the soldier in full military array.
    — Brougham.
  2. One who, or that which, disciplines and directs.
    The law was our schoolmaster, to bring us unto Christ.