LifeOnWry, my sister and I–five years apart–both went through this same period in high school. My sister’s was pretty severe–she actually got caught trying to drink 7 year-old beer. I simply didn’t do an entire quarter of Latin homework (not a single damned assignment, whoops). Now, I can’t speak for my sister, but I know I used a lot of the same excuses that your daughter is.
I’m familiar with some of the social pressures that the area and that particular high school can have. Being into things like Renn Faire and goth-vampy stuff were not, as I recall, tickets to popularity (though, admittedly, I think they’re a bit more acceptable than they were when I was in school). And, even if you have your own group of friends, it can feel very, very lonely out there. The social scene still is very cliquish–at least from what my sister tells me–and it can be hard to get along. Even if she doesn’t realize it, that could be getting your daughter down.
Getting into after-school activities helped my sister out a lot. She joined the soccer team, and, even though she was no great shakes, she did have a lot of fun. She’s doing really well, now, even though she was a total mess freshman year. Counseling also helped her, too, but I don’t think it’s necessary in your case. My problem was just that the work was boring, and that I didn’t want to do it. I know that at least one of the honors Bio teachers at that school is dead boring–if she has him, it might just be that the work is really, really tedious and pointless, in which case a lesson of “sometimes you just have to play their game” might work wonders (God knows it did for me).
Also, I know from not-personal-but-still-darn-skippy-experience that the automated phone calls can be circumvented if the kid answers the phone and listens the whole way through. If you have caller ID, though, that isn’t a problem. And they’re so TOUCHY. My mom pretty much ignored them one year, 'cause they kept on saying I skipped Driver’s Ed when I didn’t.
BTW, if you need any recommendations for stuff–or, heck, even if you just wanna know if your daughter’s hanging out with my sis–shoot me an e-mail.