Some have also written, or are in the process of writing, letters directly to Education Minister Erica Stanford about the issue.
The government amended Section 127(2)(e) of the Education and Training Act, and Ms Stanford recently directed school boards to remove expectations to uphold the Treaty.
Dunedin North Intermediate School’s board has written a letter to the minister, saying it "strongly opposes" the directive.
"These [Treaty] values guide how we teach, learn and connect with our community.
"They are not optional extras, they are the foundation of who we are.
"To remove this responsibility from education law would be a step backwards, away from the inclusive, respectful and equitable society we are all striving to build.
The school said it was joining the National Iwi Chairs Forum and many other schools across the country in calling for the government to reaffirm its commitment to the Treaty in education.
Logan Park High School and Queen’s High School are in the process of writing to the minister, also opposing the directive.
In a recent school newsletter, Queen’s High School’s board and school staff said the directive represented "a significant step backward" for education in New Zealand.
‘We will be formally communicating our strong opposition to the Ministry of Education and will continue to advocate for the necessary expectations to remain in place.
"The approach taken by the ministry fundamentally undermines the vital partnership between tangata whenua and the Crown.
"‘It fails to prioritise the focus on equity, inclusion and cultural identity as a core function within our schools.
"Removing this expectation risks creating a less inclusive and less culturally responsive education system."
The newsletter said the school was "profoundly proud" of its whakapapa, connections and relationship with mana whenua.
"Therefore, we want to be absolutely clear, the Queen’s High School board is unwavering in its commitment to ensuring that Te Tiriti o Waitangi continues to inform our governance and decision-making.
"Our commitment is not a compliance exercise, it is a moral imperative that enriches the education we offer and ensures all students, especially Maori students, see themselves and their culture valued and reflected in their school environment."
Otago Primary Principals’ Association (OPPA) president Kim Blackwood said many primary school boards across the region had similar feelings, and the association also sent a letter to the Minister of Education last night.
"From an OPPA perspective, we, too, are unhappy about all of the changes that she’s [Ms Stanford] doing, the lack of consultation, and the Treaty of Waitangi is definitely one of those things we will write about."
South Otago High School principal Mike Wright said many secondary schools across Otago had also publicly opposed the directive in their recent school newsletters, including his own.
He said the school had done a lot of work to promote Maori language, culture and tikanga, and it would be continuing that in the future.
"During the last decade, South Otago High School has invested in promoting these aspects of New Zealand culture with the benefits of improved attendance in school for Maori learners, improved educational outcomes for Maori learners, and improved engagement in education for all students."
He said the school’s actions would continue to support the positive impact.
"In terms of benefit from these actions, there are no drawbacks."
