In preparation for the centennial of Montessori education, school leaders have a unique responsibility--not only to the communities, but also to Dr. Montessori's memory--to revise the educational practices in a manner that is both respectful of her theories and responsive to a changing educational landscape. This article outlines one example of Whitby School's attempt to live up to the challenge of being an authentic Montessori school, as laid down by its founder, Nancy McCormick Rambusch. The author focuses on determining the characteristics, goals, and structure of the Second Plane of Development and addresses the needs of the children. The responsibilities of the leader of an authentic Montessori school to facilitate the thoughtful interpretation of Montessori philosophy and to foster respectful dialogue about Montessori practice, in the same manner so ardently championed by Nancy McCormick Rambusch. These are, as they always have been, the "inevitable tasks" required of authentic leaders in Montessori education. (Contains 9 figures.)