A survey suggests most schools opposed to national standards in reading, writing and maths are keeping their opposition quiet.
Two Invercargill school principals, Kerry Hawkins and Marlene Campbell, organised an online survey of principals opposed to the standards.
Mr Hawkins says 288 principals responded, and 60% said their board of trustees also opposed the standards.
But only 11.5% of respondents said their school's opposition was overt.
Mr Hawkins says schools opposed to the standards might still be implementing them, because they don't want to risk breaking the law.
The survey also found the views of 28% of respondents were at odds with their board of trustees.