Heyder, Ekkehard Friedrich, of St. Charles, Missouri, died on Wednesday, January 28, 2009 at the age of 70. Dear husband of Betty Heyder; dear son of the late Erhard and Susanne Heyder; loving father of Markus Bruce (Kathy) Heyder, Ruth Kathleen Heyder, and Deirdre Elisabeth (Greg) Harris; proud grandfather of Cameron Heyder, Nathaniel Heyder, Alexandra Harris and Jack Harris; dear brother of Ulrich (Monika) Heyder. He was a Teacher at several Waldorf Schools in Germany and the US. He was a founding member of the Princeton Waldorf School. He also belonged to the Goetheanum, Paedagogische Sektion, and the Anthroposophical Society.