KSUOWL saidThere are some great ab routines online that will target all parts of your abs and all it requires is a floor or something to lay on.
When you Google "ab routines" I think the first link that comes up is from Bodybuilding.com which is an amazing website to turn to. Do some research. No one will want to spoon-feed you answers.
Besides, your school should have a gym, make use of that because you are already paying for it.
Wow, it's been a while since I've been to www.bodybuilding.com, I used to visit it a lot and learned a lot from the articles there.
Anyway, MrYoung10, I did a quick search on the www.bodybuild.com website. There's this article that still requires to you buy a couple pieces of equipment, but it's minimal, and hopefully meets your needs. Here's the link: http://www.bodybuilding.com/fun/belfert_bmt8.htm
. You can find more useful information as you search through the website.