Actually, I'm about to go to USC School of Arts and Cinema.
You're going to need either the bomb grades and SAT score and a pile of money, or you need to do what most people do, which is to get an AA at a local college before applying.
To get in I did almost 80 units

(60 is normal), including five honors classes, did 4 semesters in the Radio/ Tv program, only got 2 B's in 22 classes and have been doing production since I was 13 years old. I graduated with honors and received an AA in liberal arts.
Your essay has to be the personal insight of Jesus H. Christo. Serious. It's like, half of why you get in.
You also need some awesome letters of recommendation from two people that aren't teachers (need work experience), one of mine was from the local performing arts theatre director/ manager.
USC is the place to be. They have the best alumni and internships. You
want an internship. Don't plan on working through film school. There won't be time. You also might want your own cam and comp so you can work alot after class.
Other peeps that talk smack about USC and film school in general are usually poor, naw I shouldn't say that, they are usually not dedicated. They don't want to put in the time and money to start at a crappy job and work their way up. They want to go all Rodriguez and spend $15,000 for a million dollar return. Propelling them into infamy and fame for life.
They also don't seem to understand that USC is the school where every senior that wants to can make their own senior film. All film schools want you to do the standard projects with digital, because its faster, cheaper and easier for all. But USC lets every senior that wants to make a film, on film. People like Ron Howard often show up during senior screenings to snatch away the cream of the crop.
Good choice. You're only in 10th grade, so I won't see you there, but I wish you the best.
Remember USC is a PRIVATE school, not a UC like UCLA. Sat's and such don't matter to them.