Online education is still in its early stages but one thing that is being done, successfully, is simply the transfer of lectures to youtube and other video hosts-- although youtube still holds more sway than most (for good reason-- they're doing things right). Here's a one hour lecture on roman numbers applied to chords.. something I discovered a weakness in someone I met the other night at a Sam Ash workshop. This presentation is a bit dry but I think it's good for you-- stop the video at points where you need to take a break.