The scale tone chord extensions in the key of F are:
So far you have played Fmaj7, Am7, C7, and Dm7. The three remaining chords are Bb maj7, Gm7 and EN7. The most important of these three chords - Bbmaj7 and Gm7 - are written here.
Note that each scale tone chord extension contains the basic scale tone chords that you learned in Lesson 13 (e.g., the Fmaj7 chord is an F chord with an E note added). Play all the scale tone extension chords in the key of F as written on the following staff, ascending and descending.