....I was just a little riled up when I was sent to ISS over the whole belt thing.
I don't blame you a bit. If it had happened to me, I would certainly be angry. It is, in my opinion, a punishment completely disproportionate to the offense. If you had been wearing baggy pants and a profane T-shirt, it would be a different story. But just because you didn't wear a stupid belt?? C'mon...
But, one more question; do students have first amendment rights at school? Or should I just drop that argument all together?
The question of whether students have full rights under the First Amendment while attending school is a pretty murky question to begin with. Beyond that, the question of student rights in the face of a mandatory dress code is even more undefined.
Considering you were not trying to make a political statement by neglecting to wear a belt, you may be on shaky grounds. (Courts are more likely to side with the student if the student is making a "political statement" by wearing or refusing to wear something.)
Here's a link to an essay that covers the topic, from the First Amendment Center:
http://www.firstamendmentcenter.org...opic.aspx?topic=clothing_dress_codes_uniforms
The only other thing I can think of, if you wish to push the issue further, is to call the local chapter of the ACLU in whatever state you're in:
http://www.aclu.org/affiliates/index.html
If they tell you you're wasting your time, you're probably better off dropping the whole thing...
Then wait for a couple of months, and mail a dead fish to the idiot teacher who gave you the ISS! (okay, kidding!! Just for the record, I'm KIDDING!!)