Teacher unions have told schools to refuse requests for their national standards data.
The New Zealand Educational Institute has told boards of trustees and principals not to give information about their national standards results to the media and to refer any requests for such information back to the Ministry of Education.
The Dominion Post has sent Official Information Act requests to all schools in the Wellington region asking for national standards information they sent to the Ministry of Education showing how many pupils are meeting national standards in reading, writing and maths.
About 10 schools replied.
Institute president Ian Leckie said the request is an inevitable but regrettable outcome of the National Standards process.