Collegiate teachers Chris Buckley and Costas Thrasyvoulou shaved each other's heads on Friday to raise money for Brain Tumour Support New Zealand.
The initiative was in honour of Collegiate's head of maths, John Dalman, who died during the last school holidays.
Dalman began at the school in 2014.
"John was a real gentleman," Buckley said.
"He was still doing extra tutoring in the evenings, right up until the end of last term."