IMHO it's very important to build a good and supportive relationship with the stude. I usually also offer to provide email support with things they may be struggling with and am easily persuaded to stay in the bar (or a pub) after the day is done.
Teaching your kids - yes, done that. My eldest son had one of the best pair of hands I've seen but was never able to find time to do the studying and exams so didn't get his licence.
HFD