The document discusses musical intervals and scales including major, natural minor, major pentatonic, and minor pentatonic scales. It provides examples of the C major pentatonic and A minor pentatonic scales to illustrate how the major and relative minor pentatonic scales use the same set of pitches. The document also lists eight scales - including D natural minor, G major pentatonic, and Eb minor pentatonic - for the student to practice. Finally, it provides a link for more information on triads.