Nadia boulanger was a prominent music teacher who taught some of the most influential composers of the 20th century, including aaron copland, philip glass, and walter piston

True. Nadia Boulanger also was known as "Mademesoille" is considered a greatest composer and teacher. She taught many composers that become the leading composers and musicians of the 20th century. For twenty-one years, she composed 29 songs for a solo musician, five instrumental music and so much more.