Board Thread:Spoilers!/@comment-3038174-20130429210540/@comment-1894786-20141003133409

Hmcooper4 wrote: Also, we're going on about who Snow's mentor is. For the longest time, Snow was weilding Robin's Bow (which she got from Rumple). Somewhere before 3x2 (Lost Girl), she must have switched bows, as she is having trouble hitting a target, and David reaches over and helps her adjust her aim.

So, based on that, I would say that Snow was taught magically initially, and David is the one that helped her shoot without magic. Well maybe she was taught archery by David, but I think this discussion is more about who taught her to hunt, thieve and survive. Actually, I'd be pleasantly surprised if it was Anna. She's technically from "another forest".