We practice mostly Kata in an hour and a half class schedule. Prearranged stuff for 15 minutes or so and the rest drills. Bunkai for us usually isn't done until after ni-dan. This is the way I was taught but I see both practices as necessary. Bunkai as I was told becomes more self evident to the individual after getting kata movements fluid. But it is hard to do a kata right if you cannot see the application clearly. I really would say it's an individuals type of learning. But I have just started teaching students as my own this year so I have a great deal yet to learn about teaching. heh training 25 years and still so much to learn from the yellow belts.