Dictionary: C Minor Pentatonic Scale

The C minor pentatonic scale is convenient to use for improvising solos and composing melodies over a C minor chord progression, especially if you are unsure whether to use the Aeolian, Dorian, or Phrygian mode at any given moment.

The C minor pentatonic scale sounds especially bluesy over a C major chord progression.  If you want an even bluesier scale, stay tuned ...

Dictionary: C Major Pentatonic Scale

The C major pentatonic scale is convenient to use for improvising solos and composing melodies over a C major chord progression, especially if you are unsure whether to use the Lydian, Ionian, or Mixolydian mode at any given moment.  It's almost foolproof in that manner.