The 38 children in the group were treated to a day in Paihia on Friday. The school has yet to decide how to celebrate.
A public performance of the group's winning routine is also planned.
The children's parents were already talking about the next nationals in Palmerston North in 2015, Ms Tamehana said.
This time the group did not perform its signature song, Hareruia, a te reo version of the Leonard Cohen classic Hallelujah. A video of the group singing Hareruia for Prime Minister John Key in Kaikohe earlier this year went viral after it was posted on the Advocate's Facebook page, attracting more than 85,000 views in its first week online.
The song was arranged by principal Joey Rogers with the te reo text penned by Ms Rogers' nephew and the head of Maori at Hato Petera College, Rev Te Hira Paenga.