*schoolmaster*

n. 1. The man who presides over and teaches a school; a male teacher of a school. [ 1913 Webster ]

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. [ 1913 Webster ]

2. One who, or that which, disciplines and directs. [ 1913 Webster ]

The law was our schoolmaster, to bring us unto Christ. Gal. iii. 24. [ 1913 Webster ]