 In 1938, the school came under the leadership of Mr. Leverett T. Smith, who served until 1963.In 1947 the school established a Board of Trustees and became a not-for-profit organization.In 1959, the school lost its Hawthorne campus due to construction of a cloverleaf highway interchange on the Taconic and Sprain Parkways, and moved to its current campus on the former Sylvan Weil Estate in Katonah.