National's decision to increase classroom sizes was made after last year's election, Education Minister Hekia Parata has confirmed.
The admission comes as Ms Parata has rejected a call to urgently meet education groups that have united in opposition to funding proposals that will increase class sizes. Instead, she says, she will try to defuse their anger and meet the organisations individually this week.
Labour has argued National would not have been re-elected had the class sizes policy been known to the electorate prior to the election.
Would you support industrial action to fight teacher cuts and larger class sizes?