Mount Maunganui Intermediate was yesterday closed for health and safety reasons after the twister caused extensive damage.
Principal Lisa Morresey said along with a trampoline from a nearby house flying through the front window of the administration block, donated pohutakawa trees being reduced to stumps and a $5000 shade sail being destroyed, the worst damage was to the school's new $120,000 astro turf.
"It's incredibly sad as we have been doing a considerable amount of work over the past few years to improve our student amenities. To see our new astro turf, which was only completed in December, ripped up and fences buckled and the hockey goals also damaged is absolutely heartbreaking," she said.
Mrs Morresey said two more trampolines landed in the school grounds from neighbouring properties and part of a roof from a nearby house ended up outside the school's front entrance.
Mrs Morresey said she was grateful the tornado did not strike during the school day.