Maybe you've never heard people refer to chords by number; maybe you have. Whatever kind of music you play, the so called "Nashville Number System" is a super useful thing to know and practice and it's easy to learn. Let's get to it! We'll practice by jamming on a modified blues progression. Get the backing tracks for practice here: http://justnickguitar.bandcamp.com Support more of these lessons by donating at http://paypal.me/justnickjaffe or pledging at http://patreon.com/justnick Thanks!!