note reading: how to read musical notes on a staff
This is very helpful not only for guitar, but, since many instruments employ the same system of notation as guitar, this skill could some day enable you to learn piano, flute, clarinet, or one of several other instruments.
how to read and write guitar tablature ("tabs."):
This is a language of notation specific to guitar, which most players know how to use. Mastery of this system will allow you to download songs from the internet and be able to play them without any instruction.
Many people can play the guitar, but most guitarists aren't aware of the mathematical connections which make certain chords sound good together. That is why All County Guitar offers instruction in music theory as it relates to the songs you learn. You will understand why certain songs are written in particular keys, and why various chords and notes sound good together. A working knowledge of music theory can also prepare you for:
lead guitar playing ("soloing"):
A working knowledge of music theory (keys, scales, etc.) can prepare you to be a good accompanist -- in other words, to play "lead guitar" and be the soloist in your band.
Once you understand how chords and notes are combined to sound good together, you can write your own songs! Dan has helped many of his students to write their own songs, and many of his former students are now recording alone or with bands.
One of the skills which Dan uses a great deal in his teaching is the ability to play a song on the basis of hearing a recording of it. And, once you gain a working knowledge of music theory, you, too, can learn to play the songs you hear on CD's and your computer -- without waiting for anyone to teach them to you!
Dan is a fantastic and passionate teacher. I have learned more (as a advanced beginner) in the past eight months than all the online and offline lessons I have previously taken. He knows his students and crafts his lessons around their ability and willingness. A great teacher.