Horace Mann School (also known as Horace Mann or HM) is a private, independent college-preparatory school in the Bronx, founded in 1887. Horace Mann is a member of the Ivy Preparatory School League, educating students from the New York metropolitan area from nursery school to the twelfth grade. The Upper, Middle, and Lower Divisions are located in Riverdale, a neighborhood of the Bronx, while the Nursery School is located in Manhattan. The John Dorr Nature Laboratory, a 275 acres (111 ha) campus in Washington Depot, Connecticut, serves as the school's outdoor and community education center. Tuition for the 2021–22 school year from pre-kindergarten through grade twelve is $57,200 per annum, not including some additional fees, one of which exceeds $1,000. The 2020 Niche survey ranked HM as t