Here is an updated prototype for online lessons / exploration tools. This is based on earlier prototypes that I created as part of my Capstone Project at Marlboro Grad Center. This one has a tabbed interface, to allow for additional information: lesson description, result note information, instructions (help), audio help, lesson index and web links.
This page allows you to explore scales, which are sequences of notes, which can be a key or mode (i.e. C Major or D Dorian). Choose a Root Note and a Scale and click View Notes. You can use the other Display Options to focus on specific positions or sections of the fretboard, or the entire fretboard.
You have two choices for note (dot) colors, one for the Root Note and the other for the related scale notes. This is intended to help you visualize where the notes are and the fretboard fingerings.
You can also click on the notes, or click the Downstroke / Upstroke buttons, or the Play buttons on Note Info tab. This will allow you to hear the notes and learn how each Scale sounds, and relate this to the scale type (i.e. Major or Minor or a given Mode).