In total, 157 schools that used the New Zealand curriculum submitted 354 responses - with only seven from Northland.
Six of the region's respondents agreed the content had a strong bicultural focus and good clarity of progressions.
But almost 30 per cent said they lacked access within their network to quality social sciences and history expertise. They also disagreed with the New Zealand Curriculum's effectiveness.
A shortfall of quality resources to support teaching and learning was also noted in all seven Northland responses.
Hetaraka was disappointed Tai Tokerau provided little input during the early rounds of consultation.
"What education has done in the past, in multiple different ways, is trying to whitewash our education and thereby whitewash our society.
"Therefore, a lot of Māori people also don't have the language and cultural understanding," she said.
"This is our chance to have a say and it is important that people in Northland do take some time and give feedback."
Hetaraka reasoned consultation on the changes had fallen off the priority list as Covid-19 overwhelmed schools.
Pauline Cleaver, associate leader (hautū) pathways and progress, said the Ministry of Education supported kaiako, teachers, tumuaki and school leaders to engage with the draft content and give detailed feedback on the draft curriculum content during the schools and kura survey.
"We also supported more than 20 Māori-medium kura and 60 English-medium schools to trial the draft curriculum content in their akomanga and classrooms."
Cleaver said the ministry understood the range of challenges the schools had during the consultation period last year. Therefore, participation in the survey and trialling remained optional.
Following the launch of the finalised curriculum content, Cleaver said their focus had now shifted to supporting schools and kura to understand and unpack the new content as they prepare to include it in their teaching and learning from the start of next year.