Education Minister Hekia Parata says New Zealand is doing everything right to reform the education system, in the wake of a fall in an international league table.
She said the Government recognises the seriousness of the slide in the OECD rankings is, but the 15-year-olds who sat the test were products of 10 years of a changing education system and not its controversial National Standards assessments.
"This is serious and we are taking notice of it, that's why we participate in Pisa [the OECD's Programme for International Study Assessment report],'' she said.
She said her ministry had inherited an education system with long-standing issues, which she had been trying to overhaul. But Ms Parata assured her, at times, controversial methods had the approval of international experts.
"Andreas Schleicher, who is the OECD head designer of Pisa and who has been running this for 15 years, has told me that everything that we're doing in the New Zealand education system is what they recommend should be done when you want a whole of system change,'' she told TV3's Firstline.