After the War, her vision resulted in further expansion – a new assembly hall (Eton Hall), extra classrooms and dormitories in East Wing; a gymnasium; the School Chapel; Dalhousie classrooms and a boarders’ recreation block and library. The School continued to grow under the leadership of both Sister Jean-Marie (1965–1970) and Sister Helen (1971–1977), maintaining the SSA’s traditional high standards of education and spiritual growth. The School celebrated its 75th anniversary in 1970 with the opening of Toorak and its library, staff room and science laboratories. In 1977 the Sisters took the decision to appoint a lay Headmistress, while still retaining ownership and guidance of the School. Margaret Kugleman (1978–1982) was followed by Evelyn Heath (1982–1993), Mary Hutchings (1993–1995) and Judith Hill(1995–1996). To accommodate the growing number of students and the diversity in curricular and extra-curricular activities during this time, the Avoca and Jackson Wings were built, providing both general and specialist classrooms.