Referring to the Jewish custom of the pupils sitting on benches or on the floor, while the teacher occupied an elevated platform.
Gamaliel
One of the seven Rabbis to whom the Jews gave the title Rabban. Rab, “teacher,” was the lowest degree; Rabbi, “my teacher,” the next higher; and Rabban, “our teacher,” the highest. Gamaliel was a liberal Pharisee. “As Aquinas among the schoolmen was called Doctor Angelicus, and Bonaventura Doctor Seraphicus, so Gamaliel was called the Beauty of the Law. He had no antipathy to the Greek learning. Candor and wisdom seem to have been features of his character” (Conybeare and Hewson). See Act 5:34 sq.
Instructed (πεπαιδευμένος)
See on chastise, Luk 23:16.
According to the perfect manner (κατὰ ἀκρίβειαν)
Lit., according to the strictness. See on perfect understanding, Luk 1:3; and diligently, Act 18:25. Compare, also, Act 18:26; Act 26:5.
Zealous (ζηλωτὴς)
Or a zealot. On the word as a title, see on Mar 3:18.