The Pentatonic Scale

The pentatonic scale is usually the first scale beginning guitarists know and use for improvising.

The pentatonic and blues pentatonic scales are used very frequently in rock,blues & pop music, but you hear them less frequently in jazz music and when you hear them it is usually on a modal tune or a jazz blues, but almost never on standards.
After we've learned the other scales that are useful for playing jazz, we tend to forget the pentatonic scale, but it's actually a very good device to add some variety to your improvisations.

If after the following lesson you'd want to know even more about pentatonic scales, I suggest you take a look in this excellent book (it's the jazz theory bible) :

The Jazz Theory Book by Mark Levine. The most comprehensive Jazz Theory book ever published! More information...

Let's start with the basics of the pentatonic scale.

A pentatonic scale is any scale that contains 5 notes.  Any scale that contains 5 notes can be called pentatonic, but when people talk about pentatonic scales they refer to the minor pentatonic scale or the major pentatonic scale.

The major pentatonic scale consists of the 1, 2, 3, 5 and 6 of the major scale.
So C major pentatonic would consist of the following notes :

C Major Pentatonic Scale

C      D      E      G      A

The minor pentatonic scale consists of the 1, 3, 4, 5 and 7 of the natural minor scale (the aeolian scale).
So A minor pentatonic would consist of the following notes:

A Minor Pentatonic Scale

A      C      D      E      G

You might notice that the C major pentatonic scale en the A minor pentatonic scale have exactly the same notes, just like the C major scale (ionian mode) and the A natural minor scale (aeolian mode) have the same notes.  If you're not sure what modes are, you might want to check this other lesson: The Modes.

Some advantages of the pentatonic scale:

• the fingering on the guitar fret board is simple.
• the pentatonic scale works well with techniques like pull offs and hammer ons.
• because the pentatonic scale has only 5 notes, it's quicker to change from lower to higher positions on the fret board (or reverse).
• the pentatonic scale can bring some variety in your sound, that is if you don't overuse it.