Orff Schulwerk was developed by the composer who was best known for what cantata?
Orff Schulwerk:  It was developed by the German composer Carl Orff (1895–1982) and colleague Gunild Keetman during the 1920s. Carl Orff: Carl Heinrich Maria Orff (] ; (1895--)10 1895 – (1982--)29 1982 ) was a German composer, best known for his cantata "Carmina Burana" (1937).
i don't know