age 13 Music Theory for Songwriters - Home It has a chord map using Roman Numerals that shows every possible chord for Major scales and what chords they move toward. Very useful for someone that's trying to find some inspiration to spice up a song.
Guitar Scale Wall Chart, The C scale is featured. That's how I began learning to improvise. Time to learn some guitar THEORY and tune up your jams! Read more about the fastest way to learn theory for guitar in the link