Extensions for Dominant 7th Chords

How do know what extensions to put on what dominant 7th chords?  What are extensions?  This lesson should shed some light on that.  Keep posted for more lessons like this in easy to print/save .pdf format on my soon-to-be-unveiled website!

Also, special thanks to Mr. Jamey Aebersold for catching a typo on this sheet.  The 13th is the same as the 6th, not the 5th.  Updated lesson is below: