Indiana High School Athletic Association (IHSAA) (Indianapolis, Indiana)

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The Indiana High School Athletic Association (IHSAA) is the arbiter of interscholastic competition among public and private high schools in the U.S. state of Indiana. It monitors a system that divides athletically-competing high schools in Indiana based on the school's enrollment. The divisions, known as classes, are intended to foster fair competition among schools of similar sizes. A school ranked 3A is larger than a school ranked 1A, but not as large as a 6A-ranked school. Only football has 6 classes. Boys' basketball, girls' basketball, volleyball, baseball and softball are divided into four classes. Boys' and girls' soccer have featured three classes since the 2017–18 school year. All other sports compete in a single class.