"I think we have been incredibly lucky as it could have been a lot worse."
Mrs Morresey said she was heartened by offers of help, which had flooded in from the community. "People have been amazing and we hope to be able to reopen the school on Monday."
Year 8 pupils Molly Shivnan and Sam Jones, both 12, were dismayed by the extent of the damage and immediately volunteered to be part of the clean-up team.
Sam said he had seen tornadoes on TV but to see the damage they could cause first hand was "quite shocking".
Molly said: "It's very sad but I'm so grateful no buildings at our school were badly damaged and no-one was injured or killed."
Education Ministry personnel were at the school assessing the damage yesterday before the clean-up started.
Mrs Morresey said she wanted to pay tribute to Tauranga City Council's staff and maintenance contractors, who swung into action quickly.