Tutor in the Bible

2 Kings 10:1 And Ahab had seventy sons in Samaria. And Jehu wrote letters, and sent to Samaria, unto the rulers of Jezreel, to the elders, and to them that brought up Ahab's children, saying,
Acts 22:3 I am verily a man which am a Jew, born in Tarsus, a city in Cilicia, yet brought up in this city at the feet of Gamaliel, and taught according to the perfect manner of the law of the fathers, and was zealous toward God, as ye all are this day.
Galatians 4:1-2 Now I say, That the heir, as long as he is a child, differeth nothing from a servant, though he be lord of all; 2 But is under tutors and governors until the time appointed of the father.