Clement Crisp, one of the many writers who eulogized Balanchine, assessed his contribution: "It is hard to think of the ballet world without the colossal presence of George Balanchine ..." In his lifetime he created 465 works. Balanchine extended the traditions of classical ballet. His choreography remains the same to the present day and the School of American Ballet still uses his teaching technique. As one of the 20th century's best-known choreographers, his style and vision of ballet is interesting to many generations of choreographers.