Scotland’s largest teachers’ union, the EIS, voted to ballot its members for strikes at its conference last week.
The 60,000-strong union says education cuts are causing job losses and bigger classes.
Some teachers have even reported shortages of pencils and notebooks.
EIS general secretary Ronnie Smith told delegates in Dundee, “Let’s be blunt. After a decade of education, education, education, we now enter a decade of cuts, cuts, cuts.”
However, the ballot and strikes will not take place until 2011.
It would be the union’s first national strike for 20 years.
The union also announced plans to ballot for a work-to-rule over the new “Curriculum for Excellence”.
This would see teachers work only their contracted 35 hours a week. But delegates stopped short of backing a proposal to boycott it outright.