First, let's set up the class you desire. Will your assignment be at the Elementary, Middle, or High school level?

And what is the atmosphere of the class? Class A: Many high-achieving students, enjoying a relaxed school life. No bullying. Class B: Most students are quiet, but many are troubled by career paths or romance. Class C: Three students with bad behavior; no bullying, but they cause other problems. Class D: Class relationships are the worst; their unity is tested whenever there's an event. Class E: Most students have terrible behavior. Bullying exists, targeting the quiet kids. Class F: Trash. Overflowing with boys who act like horny monkeys and girls who engage in insidious bullying.

Now, feel free to decide any other settings you like.