Rachel Burnett, Dargaville High School English teacher and PPTA Northland Lower Regional chairwoman, hoped the planned industrial action would show the Government teachers were not going to stop until "meaningful changes" were made.
"We must make changes to ensure that our kids are taught by qualified professionals and that teachers are supported enough to stay in their jobs."
Ellen MacGregor-Reid, Ministry of Education deputy secretary, said given the action only affects one year group at a time and will not affect the full school day for teachers, striking teachers will still be getting paid.
The PPTA has also planned rolling industrial action for the week starting Monday, June 17, and Northland teachers and principals are up first to strike.
Burnett said teachers shared the frustrations some parents had.
"We also wish it hadn't got to this point and we would much rather be teaching their kids.
"I would also warn parents that if changes are not made, it is more than likely that their children will go through school having never been taught by a subject specialist," she said.
Education Minister Chris Hipkins has invited the PPTA and the NZ Educational Institute to talks with him and Ministry of Education officials tomorrow.
Burnett hoped the urgency and the importance of teachers' claims would be acknowledged during that meeting.