Teachers in England have said they would be willing to strike over the government's proposed 2.8% pay rise this year.
The offer was rejected by 93.7% of members of the National Education Union (NEU), England's largest teaching union, who took part in an informal ballot.
And 83.4% indicated they would be willing to strike in the vote, which aimed to gauge teachers' mood.
Education Secretary Bridget Phillipson said "any move towards industrial action by teaching unions would be indefensible".
The vote does not mean teachers are about to strike.
They have to support industrial action in a formal ballot before that can happen, and enough of them have to vote.
A vote on the next steps will take place at the annual conference of the NEU in Harrogate next week.
Any formal ballot would be likely to take place in summer.
