I am a retired auto worker. Part of my job was to help train apprentices. Usually they needed tutoring in math. That was one on one. The mother of grown sons was one. She had asked a professor neighbor what she would need as an apprentice. He suggested a caculator. I had thought a calculator was too valuable and too delicate to bring in the shop. I'm still not too old to learn. She was laid off; when she came back she said she had forgotten all the math.
I have long been interested in the medieval trivium. This is usually derided (How many angels can dance on the point of a needle?). Actually this was training for thinking and debating on one's feet. I encouraged apprentices to go to union meetings and speak at every opportunity. The ubion would grant members and non-members a place on the agenda to deliver a speech. Would that this were true of the classroom.