The Horace Mann School was founded in 1887 as a coeducational experimental and developmental unit of Teachers College at Columbia University. The Horace Mann School for Boys moved to Riverdale in 1912, and during the 1940’s, severed formal ties with Teachers College and became Horace Mann School. The HM School for Girls remained at Teachers College through the 1940’s. Since the 1970’s we have educated boys and girls in Nursery through Twelfth Grade. Our main campus, home to the Lower, Middle and Upper Divisions, is located on 18 acres in Riverdale. The Nursery Division is located in Manhattan. The John Dorr Nature Laboratory, our pioneering outdoor education center, is located on 100 acres in Washington, Connecticut. Since its founding, Horace Mann has changed in many ways but remains steadfastly dedicated to five core values: The Life of the Mind, Mature Behavior, Mutual Respect, A Secure and Healthful Environment, and A Balance between Individual Achievement and a Caring Community.