Hi Everyone , Check out this url!! http://jazztheory.org ... It has some great information on chord progressions, chords, scales , improvising and alot more. It also has an interactive Keyboard & Bass guitar layout that lets you try out different chords in all keys and will test your knowledge. Learn some theory from a teacher who has taught Jazz piano since 1952 and played with many of the great players of Jazz. Good content being updated quite often! Apply jazz technique to all your other artforms and become much more creative in each one...