The lost avatar

Korra, now almost eighteen, goes on a field trip mandatory due to her school. There she realizes she just might be the avatar. Now it's up to her to save the class trip and everyone inside with the help of her 'sisters', a snobby whore, a guy who she might actually like, and a pretty random guy. Can she put the crooks in their rightful place? Bending (obviously)and high school.