Police have arrested a 15-year-old girl in relation to the fire at Kerikeri High School on Sunday June 6.
The girl will appear in the Kaikohe Youth Court today facing a charge of arson.
The fire, which occurred in the early hours of the morning, destroyed one classroom and severely damaged several others.
Police would still like to hear from anyone who may have information relating to the fire. Anyone with information can contact Detective Sergeant Jason Crowe on 09 405 2966.
For further information contact Northland Police Communications Officer Sarah Kennett on 09 430 4525 or 027 494 1214