While looking at a list of the 2010 high school football champions in the state of Texas, I wondered what is the difference between Cibolo Steele and Pearland? They're both very large schools (5A), but one is 5A II (Cibolo Steele) and the other 5A I (Pearland). And the same goes for all four classifications below 5A. Essentially, my question is, what is the difference between a I and a II in each classification? Is it based on size? Geography (north/south)? Coin flip?