coeducation

/ˌkoʊɛdʒʊˈkeɪʃən/

When kids of all genders attend school together, it's called coeducation. Before the 19th century, all-girl and all-boy schools were much more common than coeducation.

Coeducation is the norm in Western countries, where single-sex schools are the exception to the rule. In majority Muslim countries, it’s far more common to have separate schools for boys and girls. A British school, Archbishop Tenison's Church of England High School, is the oldest known school to embrace coeducation, admitting both girls and boys when it opened in 1714. Coeducation dates from the 1850s, adding the prefix co- ("together") to education.

Definitions of coeducation

1. noun

   the teaching of different genders in the same institutions
   type of:

   didactics, education, educational activity, instruction, pedagogy, teaching

   the activities of educating or instructing; activities that impart knowledge or skill