Well, he has his permit now. And turnabout fair play, he's become my chauffeur.
First off, let me say he's a very conscientious driver. He takes it seriously, and he's earned my trust behind the wheel.
Of course, having the parents that he does, unfortunately he has a hereditary condition called "lead foot." We'd hoped it would skip a generation as these conditions sometimes do, but no such luck.
Anyway, whenever anything has to get done that requires driving, he drives me there. The market. The dry cleaners. The Lexus dealer. To and from school. Every minute behind the wheel is a learning opportunity for both of us.
Since all the rules of the road are fresh and top of mind to him, it serves two purposes: to make him a better driver, and to make me one as well. I've acquired some sloppy habits over the years (rolling stops, not signaling as often as I should, that "lead foot" thing) that I'm now much more aware of thanks to him. And it's not that he's pointing out my mistakes - it's just me noticing how good he's doing and seeing where I can improve.
In a couple years, when my daughter gets her permit, I have no doubt she'll be a great driver as well.
At the end of the day, all you can do is put them in a safe car, know they're paying attention, and hope they don't have a target on their back.
And making sure they're an excellent driver doesn't hurt either.