The devil will be in the detail of how National's plan to overhaul the curriculum would be enacted.

The party's policy includes requiring schools to do at least an hour a day of reading, writing and maths and standardised tests twice a year from years three to eight.

Education Hub Founder Nina Hood told Mike Hosking while we need to make sure young people are literate and numerate, she's concerned about unintentional outcomes.

She says an emphasis on those three areas could run the risk of narrowing the curriculum, and we need to make sure we have breadth.

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