Thanks to Skeever for organizing a weekly challenge thread over on the DT subforum, I've been looking into improving my music theory and ran across this resource just in time for the start of the course:
Berklee courses on CourseraIt's free if you don't want your assignments graded or a certificate of completion (audit the course). I've signed up for the following courses:
Guitar Scales and Chord Progressions
Guitar Voicing Techniques: Playing up the Neck
Arranging for Songwriters
I learn better with structure, so if anyone has any familiarity with these courses and/or has other suggestions, I'm all ears!