This is a free basic teaching guide to the essentials for music theory. If you can, I highly recommend getting Adobe Reader, and downloading this onto your system. However, the PDF is readable through the following link:
http://learnmusictheory.net/free/freefe ... okvol1.pdf
(Keep in mind, this is just the free version. Now i'm not advertising, but I would look into getting the full version.
I actually bought it, it's only $4.95, It's not a bad price considering it's 198 pages long.)
Hope this helps you guys out with learning music theory!