Contact the IHSA (Illinois), they have a rating system for officials so that they can get promoted. Consists of evaluations from coaches and Certified Officials(Illinois goes X=Registerd to R=Recognized and C=Certified). You pretty much have to be a Certified Official before you start getting the really good varsity games and that takes a minimum of four years (two years at each level before you can apply for advancement).
http://www.ihsa.org