Among them were (from left) Anju Okajima (8), representing Japan, Annette Maydl-Strika (7), representing Chile, Lilli Badenhop (7), representing Australia, and Milley Ichihara, also representing Japan.
International student co-ordinator Sarah Ferguson said the years 7 and 8 pupils organised the day to celebrate the more than 40 nationalities represented at the school.
Part of their role was to support pupils who did not speak English as a first language and translating for teachers and parents to promote "global awareness".
Following a shared lunch, with food stalls from 17 different countries, the entire school took part in a parade, which included flag bearers, led by Queenstown bagpiper Graeme Glass.