This Level 3 Edition covers:

Major Scales, Major Keys, Compound Meters, Key Signatures, Chord Inversions, Chords in Root Position, Dominant 7th Chords, Major 7th Chords, Minor 7th Chords, Diminished Chords, Leger Lines, 32nd Notes, 64th Notes, Rests, Time Signatures, Triplets, Intervals, Key Chart, Natural Minor Scales, Harmonic Minor Scales, Melodic Minor Scales, Signs, Symbols, D.C., D.S., the Coda, and Fine.