To make competitions fair, bands normally split into different "classes" or "divisions" based on certain factors. One popular classification system uses the size of the school to split up the competing bands. This is the method used by Bands of America, the Indiana State School Music Association, Kentucky Music Educators Association and the University Interscholastic League. Alternatively, the number of band members determines the class—with the largest bands being Division I, and smaller bands being classified as Division II, III, and IV.