My mom is trying to make me take gym?!?

[P.J.]

So here's the deal: courses for the 2011-2012 school year are going to be chosen in the few coming months, and my mom keeps telling me I have to take physical education, or, if I don't, I have to join a sports team. It was a huge battle for to be able to forgo gym this year, so I ended up having to be on the swim team (which I hate, because i have to get up really early) INSTEAD. I'm going to be 16 when grade 11 rolls around, and I think i'm old enough to make these choices myself. I really don't want to take gym, and I absolutely SUCK at sports. I already teach kids how to swim on Thursday nights and Sunday afternoons, and have a job at a grocery store. Plus, she REFUSES to sign my course selection sheet if i don't either take gym or promise to join a team. And she got pissed off with me last week and told me she would just let my Dad sign my sheet because "he doesn't give a f**k" (that's what she said). How do I reason with her?