You guys are cool. Great to have so many music teachers on the board.
Anyway, Beth, if none of the above ideas work, I'd be glad to show what a fifth is next time we see each other. (for starters, it refers to the distance between two notes on a scale, or less properly between two chords in a progression) I find that some of these things are hard to explain through mail, but easy to show. But maybe that's just me.
By the way, (Giggles, you might be amused by this, too) last year I have my fifth graders doing college intro level music theory, mostly chord progressions, and composing their own music. Not only did they get it, they loved it. My secret? I never told them they were learning music theory.
The basics really aren't that hard, especially for someone with your innate "ear." You'll pick it right up.
May I echo...whose suggestion was it?...to try to find a private teacher, or audit a college course. Both require money and time, but no one said it would be easy.
Good luck--Tom