Teachers may take part in a mass walk-out over government demands they increase pensions contributions.
Members of the Association of Teachers and Lecturers (ATL) are "outraged" teachers must pay a 3.4% increase in pension contributions by 2014.
They say the government should have waited until the outcome of an independent report by Lord Hutton into public sector pensions, and should reassess the value of the Teachers' Pension Scheme (TPS) before making any changes.
Hutton's interim report in October said civil servants' pensions were unfair, and suggested increasing contributions and a move away from final salary schemes as the best reforms. His report on public sector pensions is due in March.
"Members are rightly furious the government has delayed a full valuation of the pension scheme and is now demanding that they pay more into their pensions before knowing whether this is necessary," ATL general secretary Mary Bousted says.
"It is grossly unfair to expect teachers and lecturers to shoulder the burden of a budget deficit for which they were not responsible.
"It looks like teachers and lecturers are being prepared as the sacrificial lambs to make the Chancellor's Budget sound better."
Alice Robinson, ATL senior vice president stresses industrial action is a last resort for members, but adds: "We expect the government to honour the process agreed with the Trades Union Congres for reviewing all public sector pensions and we expect to be told the financial health of the TPS before agreeing to any changes."
The union will ballot its members over national strike action, and if passed, it will be the first time the ATL has taken such action since 1979.
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