1920:

13 CGHS students are reported to be sick from the influenza epidemic in the Sun newspaper.

1920:

The house of William Strange at 85 Papanui Road is gifted to the College Board. It included 3 ½ acres of land adjacent to a parcel of land on Shrewsbury Street the board had previously purchased. Combining the two properties gave space of 5 acres of land. The Board considered this as a potential site for a new school, but it then decided to make it the boarding facility. The house was renamed Acland House after Mr Henry Dyke Acland, a solicitor, and the Chairman of the Board, who had been championing the needs of girls from rural locations for some years.

1921:

Thirty eight girls were accommodated at Acland House, the new boarding house for CGHS.

1921:

The inaugural Monica Thacker Shield competition was held at the Tepid Baths in Christchurch. This shield was to be won in a Lifesaving Competition between secondary school girls. The first winners were the CGHS A Team, composed of Verna Sucking, Gwen Bowring, Jessie Dunbier, and Florence Bell. The shield was presented by Mrs Monica Thacker, the wife of Dr Henry Thacker, the Mayor of Christchurch.

1922:

Nancy Reid becomes the first named Head Girl of Acland House.

1926:

The board builds the south wing to Acland House. It is named ‘Gibson’, in honour of the principal Mary Gibson. A further prep room is built near the front gate.