Teachers in the NUT and NASUWT unions at Weston Favell school in Northampton are set to strike on Thursday of this week against plans to turn the school into an academy.
The disgraced United Learning Trust (ULT) would run the planned academy.
ULT is the largest sponsor of academies in Britain.
Yet just last month the government banned it from taking on any more schools because of the dire performance at the academies it already runs.
ULT is still to go ahead with two new academies in September next year – Weston Favell and a school in Oxford.
If the plans go ahead in Northampton, ULT will run both secondary schools in the area.
Hilary Bucky, the NUT’s eastern regional secretary, said that Weston Favell had been “making good progress – balanced against the Northampton academy ULT has been running for the past five years, which has made marginal improvements”.
As well as trade union opposition, the school’s governing body and student body are opposed to the plans, as are many parents of children at Weston Favell and feeder primary schools.
The council received so many responses during the public consultation on the plans that it had to delay a final vote on whether to go ahead with them.
A special meeting of the county council’s cabinet will make a final decision on Thursday of next week.