 These organizations certify the use of the registered names "Waldorf" and "Steiner school" and offer accreditations, often in conjunction with regional independent school associations.The first US Waldorf-inspired public school, the Yuba River Charter School in California, opened in 1994.The Waldorf public school movement is currently expanding rapidly; while in 2010, there were twelve Waldorf-inspired public schools in the United States, by 2018 there were 53 such schools.