NASUWT General secretary Chris Keates told a fringe meeting at the Labour party conference in Manchester that the industrial action involved areas which "burdened" teachers.
We are sending a strong message to the Government, and we need Labour to stand alongside us. We cannot stand by and allow this Government to wreck education.
Ms Keates said what was happening in education was similar to the "privatisation" of the NHS.
We don't want privateers and marketeers in schools. We have a fight on our hands - and we cannot wait until 2015.
More top news
Storm Imogen will cause problems across much of the south today, but it will be calmer in the north.
David Cameron is expected to warn that voting for a "Brexit" would result in refugee camps springing up across the south-east of England.
Beyonce, Coldplay and Bruno Mars performed a medley of their hits during a powerful half-time performance at Super Bowl 50.