The Horace Mann School was founded in 1887 in the Bronx, New York, with the motto "Great is the truth and it prevails," providing basic education from kindergarten to grade 12. Hollysman School's upper, middle and lower school campuses are located in Riverdale near the Bronx, and the kindergarten is located in Manhattan. In addition, the school has a 275-acre John Dorr Nature Laboratory in Washington, Connecticut, which serves as the school's outdoor and ecological education center.

<h1>School History</h1>
Originally located in Greenwich Village, Manhattan, the Holrisman School was a joint educational experimentation and development unit offered by Columbia University's School of Education. In 1901, the school moved to Morningside Heights, northwest of Manhattan, home to Columbia University and Barnard College.
In 1940, the Horrisman School became independent from Columbia's School of Education, which subsequently established Lincoln School to replace the Horaceman School for continuing education experiments. To this day, Horace Mann Hall, the northernmost building on the Columbia campus, can still be seen in Horace Mann Hall.
In 1968, the Holisman School merged with the Kindergarten of the New York School. In 1972, it merged with barnard school in Riverdale to establish the Hollisman-Barnard Coeducational School, which enrolls students from kindergarten to 6th grade. In 1975, the upper grades of the Hollisman School began to admit girls, and the last all-boys class of the Horisman School ended in 1976.
<h1>Curriculum</h1>
Previously, the Holisman School offered 20 AP courses, 26 honors courses, and 6 language courses. Of the 260 faculty members on campus, 166 hold master's degrees and 27 hold doctoral degrees.
In 2018-2019, the school canceled the AP curriculum because the school found its own curriculum more challenging.
Hollysman School's upperclassmen are required to study English, World History, American History, Biology, Chemistry/Physics, Geometry, Algebra 2, and Trigonometry, as well as art, computer, health counseling, and physical education. These are the basic courses that students must complete. In addition, they need to study a foreign language for three years, with options including Chinese, French, German, Latin, Japanese, Spanish, Greek, Italian and Russian.
The Horrisman School's art program is also important, with students requiring at least 1.5 art credits (half performing arts/painting art credits and half art appreciation/art history points) to graduate.
In addition to academics and the arts, the Horaceman School has strict requirements for other aspects of its students. To meet graduation criteria, students are required to pass the swimming test and the American Red Cross CPR certification, and also complete at least 80 hours of community service (40 hours for grades 9 and 10, and 40 hours for grades 11 and 12). Students entering Grade 9 are required to complete 1 off-campus activity and 3 on-campus activities. Grade 6 and Year 7 students are required to collaborate on a class activity. In addition, lower grade and kindergarten children participate in Caring-in-Action with their families every year.