'Teacher' in the Bible

a schoolmaster for the dull and ignorant, a teacher of the young, because in the Law you possess an outline of real knowledge and an outline of the truth:

The teacher must do the same in his teaching; and he who exhorts others, in his exhortation. He who gives should be liberal; he who is in authority should be energetic and alert; and he who succours the afflicted should do it cheerfully.