The NSW Education Minister Sarah Mitchell says NAPLAN is flawed and needs to be revised or replaced, arguing it's time to sit down with a blank slate and design a new test that is "genuinely useful".

Ms Mitchell will tell a meeting of education ministers in Melbourne on Friday that NSW wants a full, independent review of the National Assessment Program, which would consider alternatives to standardised tests.

NAPLAN is more than 10 years old and there is mounting evidence it is no longer "fit for purpose".

Students sitting the NAPLAN test. Credit:Adam McLean

"Only a few months into being minister, it's become very clear that all of the education stakeholders that I've spoken to, including parents and principals, have concern about NAPLAN in its current form," she said.