The Natural Minor Scale is probably the central minor scale in Western popular music.  Also known as the Aeolian Mode, it is the 6th mode of the Major Diatonic Scale ... or in other words, start playing on the 6th note of the Major Scale and you get the Aeolian Mode.  It is a minor scale (b3) with a b6 and b7 as well.  It is used to create melodies over that all-important vi chord in conventional major key progressions and is the scale that most MINOR KEY harmonizations are based on.  Since the vi chord is the most common minor chord, it is in almost every song you will ever play.  As usual, there are 12 fingerings for it in our normal chromatic "box" orientation.  Do you need to know all 12?  Not unless you want to be the next Modern Jazz "phenom".  Try to learn as many as you can ... 4 to 6 is a good figure to shoot for.  Start with the easiest ones first ... the ones that have the fewest FINGER SHIFTS (boxes 3 and 10 have no shifts- box 5 has one).  To totally understand your fretboard and how to do finger shifts, visit www.guitar-instruction-free-lessons-online.com/chromatic-scale .  Remember, the RED DOT is your ROOT NOTE and these boxes can be moved anywhere on the fretboard to play in all 12 keys.  If you're unsure how to use these charts, visit www.guitar-instruction-free-lessons-online.com/guitar-scales .  To learn more about the THEORY implications of this and other scales, check out our DVD home study course at www.absolutelyunderstandguitar.com .