Leonard Bernstein earned glory as a composer, conductor, and pianist (classical and jazz), but nothing gave him more pleasure than the joy of teaching. He presented the unique blend of spoken words and music. He is an intensely interactive teacher, getting his audience to sing, springing a quiz full of trick questions. He can take the most abstruse subject and present them to a young audience with clarity, without condescension, and with a clear sense of the material's value. His subject-matter is enormously varied.