Some Hawke's Bay pupils are not reaching the national averages for reading, writing and mathematics, the first - incomplete - snapshot of National Standards results suggests.
The data has been labelled "dangerous and misleading" by teachers and union groups.
A comprehensive Herald On Sunday survey revealed pupils at 32 local primary and intermediate schools were achieving at levels beneath those in the rest of the country.
Data released by Education Minister Hekia Parata on Friday claimed 76 per cent of pupils aged Years 1 to 8 reached or exceeded reading standards, 72 per cent for mathematics and 68 per cent for writing.
In Hawke's Bay the averages for the 32 schools who chose to reply to the survey were 66 per cent for reading, 61 for mathematics and 59 for writing.