Watch the C Dorian online guitar lesson by Brad Carlton from Guitar Lab: Super Sustain
The goal of this lesson is to help you understand the C Dorian mode along the length of the third string. You will see in diagram seven that the root and the fifth are in red. These two notes are your strongest tones and hence provide a framework upon which you can build the scale. The root is the strongest tone and the fifth is your second strongest tone.
The C Dorian scale is mode two of the Bb major scale. In lesson six you learned to visualize the C minor pentatonic scale along the third string. As you can see in diagram seven, one way to view this scale would be to add the 2 and the 6 to the minor pentatonic scale.
There are only two different intervals in this scale when dealing with adjacent notes. The major second interval which is an interval consisting of one whole step(two frets), and the minor second interval which is an interval consisting of a half step(one fret). In the Dorian mode, the minor second interval occurs between the 2 and b3, and the 6 and b7. Memorizing these shapes will aid you when you transfer this linear map of the scale to a different string. And remember, these intervals will always remain the same no matter what key you are in.
This lesson includes a jam track over which you should practice playing this information. Apply all the techniques as demonstrated in the video with a goal of trying to keep the guitar ringing.