The term sister school (or brother school) has several meanings:
a definite financial commerce between two colleges or universities
two schools that have a strong historical connection
two schools which have social activities involving students from both schools
two schools under the same management
two schools built using the same floor plan/layout
two schools in different nations that have established a collaborative international partnership.
The schools involved are usually single-sex schools, one with female students and the other with male students.
