Complete agreement on this one. When my wife got here she needed to learn to drive (she's from a big city in another country and never needed to drive). I arranged for a pro to teach her and only after he'd given her a few lessons would I let her get behind the wheel. When I would point out an error she'd get huffy. I started making sure I was around when she got back from driving lessons so I could chat with the instructor. Sure enough, he had been trying to correct the same errors!