Welcome to the Facebook home of the American Orff-Schulwerk Association The American Orff-Schulwerk Association (AOSA) is a professional organization of music and movement educators dedicated to the creative teaching approach developed by Carl Orff and Gunild Keetman. We are united by our belief that learning about music?learning to sing and play, to hear and understand, to move and create?should be an active and joyful experience. Our mission is: to demonstrate the value of Orff Schulwerk and promote its widespread use, to support the professional development of our members, and to provide a forum for the continued growth and understanding of Orff Schulwerk that reflects the diversity in contemporary American society.