Corey Dargel posts about trying to find new ways to teach theory, if teach it we must. And we must, otherwise we're limited by habit.
Kyle Gann responds with an excellent idea--teach acoustics first. More specifically, the acoustics of interval. All pitched music, whatever tuning system or style, is based, at least in part, on interval (the "distance" between two notes). So, if you teach interval first, you can go in most any direction you want or need.