Originally Posted by: hunter1801In my theory class, we are learning about intervals. Ive understood everything in the class up to this point. I just got completely lost when this chapter came up.

This might be beside the point, but: what in the world were you learning about in music theory class before you got to intervals?

Anyway, I did an in depth tutorial covering intervals for beginners here:
http://www.guitartricks.com/tutorial.php?input=362

An overview of music theory here:
http://www.guitartricks.com/tutorial.php?input=495

And a tutorial covering how to visualize all possible chromatic intervals anywhere on the guitar fretboard here:
http://www.guitartricks.com/tutorial.php?input=462

You might also have success here:
http://www.musictheory.net/
http://en.wikipedia.org/wiki/Interval_(music)

Hope this helps.