Student-led exercises in teamwork and disaster survival raised funds for victims of the Nepal earthquakes while marking the inaugural House Activities Day at Hadlow School on Friday.
Principal Michael Mercer said the day recalled the traditional house system when there were day and boarding students.
The house system was streamlined when Hadlow shifted to future-focused learning environments. The colour-coded houses carry the names of Wairarapa town founders - Carter, Grey, Martin and Masters. On Friday, pupils wore mufti clothing in house colours, he said.
"They rotated through the eight activities, which were designed by Year 8s and are just ingenious. But at heart, it really is to get going that collegiality, that house spirit, and also to show what it would really be like in a disaster."
Mr Mercer, who is colour-blind, joined the fun, dressing "with a little help" in each of the four house colours.