Horace Mann Charter Schools were defined in 1997. The charter for these schools must be approved by the local school committee and the local union. There are 8 Horace Mann Charter Schools in Massachusetts. A Horace Mann Chater school is run operated and managed by a board of trustees independent of the school committees which approve said schools. The board of trustees may include a member of the school committee. The board of trustees may include a municipal school committee member.