Unique amongst Christchurch schools as well as New Zealand primary schools, Cathedral Grammar provides single sex education to both boys and girls on the same grounds with the Girls' School opening in 1995. The school is divided into four departments. The Pre-School is co-ed, taking boys and girls from ages three to four. The Junior School is also co-ed for pupils from Years 1-3. In the Preparatory School, a separate Girls' School and Boys' School provide largely single sex classes. Extension classes in Mathematics and English are the only co-ed classes at this level. The Boys' and Girls' School combine for chapel services, orchestra, assemblies, some sports events, operettas, social functions and share common playgrounds. The Headmaster is Scott Thelning. He is supported by Heads of Department for each of the fours areas of the school. Class sizes are a maximum of 17 in Year 1, 20 in Years 2 and 3 and 24 in Years 4 to 8. Pupils of the school generally achieve high academic standards in a curriculum which covers English, Mathematics, History & Geography, Science, Music, Art, Religious Education and Physical Education. Pupils active in the arts and in sport with the school being a part of the cricket, hockey, and tennis competitions. They have won the Canterbury hockey tournament 12* times in a row.
History
A history of the school-'Jubilate-the Story of a Choir School'-was written in 2006 by the Rev. Canon Roger Couper, Headmaster 1984–2001, and published by the Cathedral Grammarians' Association to celebrate the 125th anniversary of the school. In 1976, St Saviour's Chapel was relocated from Lyttelton onto the school grounds and served as the school's chapel until the February 2011 Christchurch earthquake, when the building suffered slight damage. The building was then relocated to Lyttelton again to serve as the Anglican church, so that the ground could be remediated.
Inveresk
In 1972, the school acquired Inveresk, a heritage building located at 17 Armagh Street, and incorporated it into the school. The cottage was originally constructed between 1863 and 1878 on land that was originally granted to Church Property Trustees in 1858, but sold to a private person in 1863. The cottage was purchased in 1879 by John Anderson Jr, the son of the former Mayor of Christchurch and iron foundry founder John Anderson. The mayor's family home in Cashel Street was called Inveresk after his birthplace near Edinburgh in Scotland. It is assumed that when Anderson senior's house was sold in 1907, that Anderson junior transferred the name to his house in Armagh Street. One of Anderson's daughters lived in the house until 1967 and after her death, the house was sold to the Church Property Trustees, which passed it on to the school. Cathedral Grammar intended to demolish the building, but after intervention by Christchurch City Council and the New Zealand Historic Places Trust, it was retained. A further application some years later in 2001 to demolish part of the building to make room for a two-storey structure was withdrawn after opposition was received. On 14 April 2005, the NZHPT registered the building as a Category II heritage structure with registration number 3117. Inveresk closed after the 2011 Christchurch earthquake and after renovation and structural upgrade, it was opened again on 25 May 2012 by rugby coach Todd Blackadder and Bishop Victoria Matthews.
Scholarships
A number of valuable choral scholarships are awarded every year to cathedral choristers. Further academic scholarships are awarded to the most academically able and/or musical applicants. These scholarships, including the Deamer scholarship and the Merton scholarship, are generally awarded at Years 5-8.
