AKA: C7/9/11, C9(11), C9/11, C Dominant 11th, C Dominant 7th/9th/11th, C Dominant eleventh, C Dominant ninth eleventh, C Dominant seventh ninth eleventh
Notes:
C, E, G, B♭, D, F
Intervals:
R, 3°, 5°, m7°, 9°, 11°
Left hand:
C + B♭M
or
C + CM + B♭M
Fingering:
2 + 4
or
3 + 2 + 4
Your diagram shows six fingers on the right hand. Of course, when played with a C in the bass, you won’t need the c in the treble. Perhaps a discussion of chords in root position and then in inversions might also be a helpful addition to be read before getting into the individual chords.
Sure! You’re right, especially in this case, it would be helpful adding some extra info. I’ve added 6 notes on the keyboard to show intervals but it may result confusing. Thank you for your suggestion!