Major Hexatonic Scale
A hexatonic scale is simply a six-note scale, just as a pentatonic scale is a five-note scale. In a technical sense, any six-note scale is considered hexatonic. The blues scale, the whole-tone scale (which we will deal with in a later system), and the symmetrical augmented scale are all hexatonic scales.
For these exercises, we will be practicing the Major Hexatonic scale, which can be seen as the major scale without the 7th. It is an extremely useful scale for improvising over major changes. The notes of a C Major hexatonic scale would be C,D,E,F,G,A (R,M2,M3,P4,P5,M6). The major and minor hexatonic scales are probably the most useful scales for improvising.