So far you have played Em7, Gmaj7, A7 and Bm7. The three remaining chords are Dmaj7, F#m7 and C#N7. The most important of these three chords - Dmaj7 and F#m7 - are written here.
Note that each scale tone chord extension contains the basic scale tone chords that you learned in Lesson 12 (e.g., the Dmaj7 chord is a D chord with a C# note added). Play all the scale tone extension chords in the key of D as written on the following staff, ascending and descending.