How it was a while ago. A man who does not teach his son a trade, teaches him robbery. In ancient times, the Jewish boys got the formal education and the girls got what leftovers they could glean from working around the house.
Jewish protocol lays out what the son needs for an education.
These were assumed as basic things. There was extra importance placed on teaching your son a trade. It s the money-maker. Study combined with a secular occupation is a fine thing, for the double labor makes sin to be forgotten. Point is, dad teaches son a trade and a familiarity with the scriptures and the Law so that the son can pass it on to his boys.