In 1914 Kathleen Gilman Jones (1880–1942) came from South Africa to be a joint head mistress at the school.

She continued with the Dalton Plan, before she left in 1961 to lead Firbank Girls' Grammar School.

Symbols on the crest were explained in the school's Charivari magazine in December 1911: the dolphins symbolise energy, persistence and the ability to swim against, as well as with, the tide; the wings suggest aspiration and ambition; the lamp and book represent learning; and the combination of the acorn and eucalyptus seed mark the historical union of Britain and Australia.

[13] Ascham is composed of three school areas designed to accommodate for the different stages of the students' educational development.

The youngest students, from Preparatory to Year 2, are taught in the Hillingdon building which has its own hall, library, classrooms and recreation area.

This method gives the older students increased flexibility while placing on them the responsibility to learn and participate in the school's numerous academic and cultural opportunities.

The AOGU encourages involvement of all past students in the Ascham community and helps alumnae remain in contact with their classmates.

The recipients of bursaries are means-tested and reviewed annually, and also carry an obligation to uphold the ideals and values of Ascham.