The Government is expected to break a year of silence on Thursday on a planned $50 million cut to spending on school staffing.
The cut was announced in last year's Budget and is due to take effect in the next financial year.
But teacher unions and principals' groups say they have heard nothing, despite assurances they would be consulted about the issue.
When Radio New Zealand inquired this week, a spokesperson for Education Minister Anne Tolley said to wait until Thursday.
School sector groups hope the lack of consultation means the Government has changed its mind and will reverse the cut in Thursday's Budget.
If the cut goes ahead, the sector groups are concerned class sizes will increase.