Watch the C Aeolian online guitar lesson by Brad Carlton from Guitar Lab: Speed, Precision & Endurance Vol. 1
There are many ways of comparing modes and memorizing their formulas. The three minor modes built off the major scale are Dorian, Phrygian, and Aeolian. This lesson shows the difference between Dorian and Aeolian which is the change of the 6 in Dorian to the b6 in Aeolian.