The Independent Girls' Schools Sporting Association, was established in Sydney, New South Wales, Australia, in 1922 with five founding members, all of them independent girls' schools.

The Presbyterian Ladies' College, Sydney is an independent Presbyterian single-sex early learning, primary and secondary day and boarding school for girls, located in Croydon, an inner-western suburb of Sydney, New South Wales, Australia. The school has a non-selective enrolment policy, and caters for approximately 1,500 girls from age 4 to 18, including 65 boarders. PLC Sydney offers the option of Cambridge Assessment International Education (CAIE) in Years 9 and 10 to supplement learning, in addition to the NSW Education Standards Authority courses, as it enables students to sit examinations in globally recognised courses. From 2025, Cambridge A-Levels will be offered as an alternative to the HSC in Years 11 and 12. Students attend PLC Sydney from all regions of the greater metropolitan area, New South Wales, and overseas.