Great post! As someone who has taught theory at the college level, I can't stress enough how useful the circle of fifths is. I've listed this post in my new "Top 5 music instructional posts of the week". That means that I'm promoting this post, upvoting with 100% Steem Power, resteeming and following you. Congrats! You can see the full list here: https://steemit.com/music/@musicsteem/my-picks-for-the-top-5-music-instructional-posts-on-steemit-for-week-ending-july-1-2017-upvoting-with-100-steem-power