While several regional athletic associations were formed around the state in the late 1890s By jaker144 Aug 23, 1896 While several regional athletic associations were formed around the state May 12, 1903 The seeds of a state high school athletic governing body were sewn. Dec 5, 1903 Establishing a statewide athletic association Dec 29, 1903 Constitution was presented to a meeting of high school principals from around the state. Dec 29, 1903 The first IHSAA Board of Control was elected. Apr 1, 1904 Membership had increased to 33 schools. Dec 17, 1904 Membership reached 71 schools. May 30, 1928 Handbook lists 15 schools as charter members.