The NFHS is the body that writes the rules of competition for most high school sports and activities in the United States. Most high schools, whether public or private, belong to their state's high school association; in turn, each state association belongs to the NFHS. Over 17,000 high schools belong to associations that are members of the NFHS.
NASSP is the leading organization of and voice for middle level and high school principals, assistant principals, and school leaders from across the United States and 35 countries around the world.
As a national organization, NAESP operates through a network of affiliated associations in every state, the District of Columbia, Canada, and overseas.