Staff at 25 colleges across England are set to go on strike next week, in a dispute over pay and working conditions.
The University and College Union (UCU) said its members at other colleges had settled their disputes following pay awards worth up to 8.7%, but industrial action remains scheduled for those where no settlement has been reached.
It said it was pressing for further “meaningful” bargaining.
David Hughes, chief executive of the Association of Colleges (AOC), said: “I am disappointed to see college staff voting for strike action, and I hope it doesn’t come to fruition as it’s the students who will suffer.”