I'm about to start writing up my character. A quick couple of questions due to the fact that I don't quite understand the american school system. 

Your characters, Ember is a junior, Hayden is a senior, but they're in the same classes? Is that just juniors and seniors or how does that work with sophomore and freshmen? (Although my character will probably be a junior or a senior, it seems like everybody else is so maybe it's just best it's mainly focused on juniors and seniors?)

Also, GPA, I read that's it up to 4.0, is it the higher side of it the better? Because from reading character bios the more smart kids seem to be higher and the burnouts seem to be lower.