Get this, Aang, being a nice 16-year-old, Christian-esque, rule-following young man, but also taking care of his grandpa Gyatso(his mother died giving birth, and his father left him/wasn't there), and having his big shaggy dog Appa, and his cat Momo, along with a 16-year-old troublemaking, goth-punk(like black lipstick, eye shadow, and punk attire), teasing, but all-around good-hearted rich young woman that is alone in her mansion, as her parents work all the time, and only has the company of her butler Iroh, who makes good tea! :) She's also blind in the left eye(you can make up any story as to why that is). :O They meet one day when Toph decides to sneak into public school after getting tired of her private charter school(and all the pervy rich guys that all want to get near her for her looks and money) by using Iroh as her grandfather to get her in. Toph and Aang soon meet after a bit of a scuffle with the school flirt, Jet, trying to forcefully woo Toph, and Aang telling him to back off. Aang finds Toph interesting, maybe because of her aesthetic, while Toph thinks Aang is a little too optimistic. They become friends after Aang tells her what his favorite band is, which is her favorite band as well(I'll say it's The Rolling Stones. LOL, I don't know, something with elements in it. XD). With them being friends, Aang brings Toph to his table, that being Teo, Bumi, Kuzon, and On Ji. Maybe On Ji would have a crush on Aang, but Aang is too oblivious, and maybe On Ji would slowly get jealous of Toph. XD
Just some fun high-school AU shenaningans. I think this could be a good story to do! Maybe even have Katara as a senior and Sokka and Zuko as dorm buddies or something. You can make up anything from there! :D I just got a lot of stories to do, and I wish I could do this, but maybe you can? :O
Speaking of stories, would you like to read mine? :) They're mostly crossovers, but I've got some one-shot stories of Taang if you like to read some of them. :)
Wow, this is a very intriguing story idea! Sadly I'm not sure if I'd have the time to write it nor execute it well. It's definitely something I would be interested in and read myself. I'm flattered that you suggested your story idea to me. <3 Since it's your idea, I think you'd be the best person to write it with the vision you had in mind.