[10] The school was named as the Tamworth Church of England Girls' School (TCEGS), by a group of parishioners from St John's Parish Church, Tamworth, led by the Vicar, Canon Rupert Fairbrother with seventeen foundation students.

Lessons were held in the church hall, and the boarding house was an old building on the corner of Brisbane and Carthage Streets.

[11] The school moved to its present site in Brisbane Street in 1923, to a property formerly owned by John Patterson.

The inaugural Principal of William Cowper Anglican Secondary Boys' School was Mr Nicholas Brown, who resigned at the end of Term 1, 2001.

[12] Calrossy Anglican School is registered and accredited with the New South Wales Board of Studies,[13] and therefore follows the mandated curriculum for all years.

The school offers core and elective subjects designed to prepare students for a range of opportunities in tertiary studies and career pathways.

Students may also undertake school-based traineeships, linking HSC studies with workplace developed competencies.

[14] Extra-curriculum activities include music groups, sporting teams, public speaking, debating and drama.

Some students arrange short term stays at the completion of their Year 10 School Certificate course.

[15] Calrossy has had stable academic results over the years with the exception of a few students performing extraordinarily well including Larissa Smyth in 2023 who achieved an ATAR of 99.90, the schools highest ever and Ella Ward who achieved first in the state for Primary Industries.