7th chords, altered chords, chord substitutions, tri-tone substitutions, altered harmonies, upper partials, comping, diminished chords, major/minor diatonic harmony.

Scales, modes, diminished, wholetone, melodic minor, harmonic minor, exotic scales.

Soloing, harmonic analysis, which scales to use and when, phrasing, fragments, call and answer.

Reading, ear training, improvising, composition, arranging.