More stability in education is being floated as an idea to reverse declining test scores.  

New Zealand's 2022 PISA reading, maths, and science scores have all dipped since 2018, and they show longer term decline.  

New Zealand is still above the OECD average in all three standards.  

PPTA Acting President Chris Abercrombie says all countries have seen a decline.  

He told Tim Dower that constant curriculum changes between different governments have contributed.

Abercrombie says curriculums need time to develop and if they're changed too often it disrupts children and teachers. 

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