Here you will find printable guitar scale charts.
The most important guitar scale to become comfortable with is the Major scale. It is the familiar 'do, re, mi' scale and is commonly used over major, major 7th, and power chords. Also known as the Ionian mode, the major scale is probably the most widely recognized of all the scales, and as such, is an excellent place to begin learning about scales in general. . The major scale is essentially no more than a series of whole steps and half steps, played in the following order: W W H W W W H .
Pentatonic scales are scales with five notes. Pentatonic scales are known primarily for the "bluesy" sound they suggest, but have been long used by blues, rock, and jazz musicians alike.