The U.S., Canadian and Mexican schools are represented by the Association of Waldorf Schools of North America. Waldorf and Steiner are registered and protected names, and in the United States, the Association of Waldorf Schools of North America (AWSNA) protects this usage. Schools that use substantial portions of the methodology of Waldorf education but are not independent enough to apply all of the latter's principles refer to themselves as "Waldorf-method," or "Waldorf Inspired" schools; these are primarily found as charter schools which are part of the public school system in the United States and, as government schools, are not included in the above figures.