My girlfriend has expressed interest in learning one of the martial arts I practice with me, but when she has come to a class she has been very self-concious about being new and inexperienced (I've done martial arts of some variety for a long time, she's never done them before).
She has said she would prefer to practice with me, rather than in a dojo, and get to be fairly capable that way and then start attending classes. I have taught beginners' classes in Taekwondo before, so I could reasonably teach her that, but I am skeptical about how valuable/effective it would be to learn 1) without a peer group at a similar level 2) from someone you know in a personal context such that recreating the rigor of a dojo would be difficult and feel forced.
I'm interested in the experiences of anyone who has taught or learned a martial art in a similar fashion--how well did it work? Did the student improve at a rate comparable to beginners in a dojo, and were they able to transition into some kind of formal training more easily than someone who had not done this?