A sister school is usually a pair of schools, usually single-sex school, one with female students and the other with male students.[1] This relationship is seen to benefit both schools.[2] For instance, when Harvard University was a male-only school, Radcliffe University was its sister school.[3] The sister school concept as a single-sex school began to change as several institutions adopted coeducational environments starting in the 1970s due to the increasing awareness or consciousness about sex bias and discrimination.[4]
^Datnow, Amanda; Hubbard, Lea (2013). Gender in Policy and Practice: Perspectives on Single Sex and Coeducational Schooling. London: Routledge. p. 197. ISBN9781136703775.