The Most Common Scale
The pentatonic scale, which is commonly called the pentatonic “box,” is the most frequently used of all lead scales, and is an absolutely universal tool for playing lead in any style. As a lead player, you need to explore this avenue first. FIGURE 3-1 is an example of a pentatonic scale in the key of A.
You can see from the music there are only five notes, and they repeat in the same sequence. As you play it try to visualize the shape your fingers make on the fret board. It's essential to memorize the pattern up and down, because this scale will be your main lead scale.
The example in FIGURE 3-2 is the same scale shape with the note names (pitches) written beneath. Now you can track which five notes make up the scale, and how they repeat.