Watch the Minor Modes Including The 9th online guitar lesson by Jason Loughlin from Blues Connections: Minor

Now let's add our 9th into every mode of the minor pentatonics. Do this in A minor, D minor, and E minor since those are the scale we'll need to play over a 12-bar blues in A minor. Once you've done this, start working on voice leading the scales over a 12-bar blues in all five positions.