Crow Island School in Winnetka, Illinois, is an elementary school significant for its progressive philosophy and its International Style architecture. The design of its building was a collaboration between the Chicago firm of Perkins, Wheeler and Will and Eero Saarinen. It currently serves kindergarten through fourth grade students. The school was established in 1940-41. The original jungle gym is located here, having been moved from Horace Mann School in 1940. The school was awarded the Twenty-five Year Award by the American Institute of Architects in 1971. It was declared a National Historic Landmark in 1990.