Here are a few lessons that cover some fundamentals that all serious guitarists should have a firm grasp of. They should be helpful to you and please feel free to print them out and share them with others.
Tips on General Playing Technique
Minor Scale Patterns
With a discussion on Relative Keys
Major Pentatonic Scale Patterns
Minor Pentatonic Scale Patterns
With a discussion on Relative Keys
Sight Reading 101 – Free Interactive Online Course
Just a note, I added this course to my website back in the Ice Age when Dinosaurs roamed the Earth. I’ll updated it at some point. You might notice links to a Glossary mentioned at the bottom of each page. Unfortunately that file got lost somewhere along the way. I’ll keep looking. Have fun!