The Blues Scale is the name given to the Minor Pentatonic Scale that includes a flatted 5th. This note is not normally in the Minor Pentatonic Scale and is added to give the scale a more bluesy sound.
Memorize this common variation of the Minor Pentatonic Scale and use it to improvise over any of the Blues rhythm tracks from previous lessons. Don't forget to practice the scale using 8th notes, triplets, 16th notes, hammer-ons, pull-offs, bending, and vibrato to help you while you explore the the blues scale.
At the end of the lesson, I've included some simple licks that use the blues scale. This is done so that you may see and hear the blues scale in action. Make a special note that sometimes the "blue note" is fingered and picked and sometimes I'll bend a note up to a blue note.