Who taught Paul and for how long?

Answer 1

1. Acts 22:3Living Bible (TLB) 3 "I am a Jew," he said, "born in Tarsus, a city in Cilicia, but educated here in Jerusalem under Gamaliel, at whose feet I learned to follow our Jewish laws and customs very carefully. I became very anxious to honor God in everything I did, just as you have tried to do today.
2. The Bible doesn't say how long but it was common to send a boy to school to learn until he became a man - perhaps from age 10 to 21.