The principal of Canterbury's Rangiora High School says she has been sacked.

Peggy Burrows says she was informed of her dismissal today which is effective immediately, following a long running stoush with the Ministry of Education.

Commissioner Bev Moore has been at the school for over a year since the Ministry sacked the Board of Trustees and suspended Burrows pending an investigation.

This came after a number of allegations and tensions over employment and finance.

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In a statement Peggy Burrows says she's extremely disappointed by the decision and will be challenging it.

She says during her 13 years as head of school she has worked hard both professionally and ethically despite more than a year of investigations.