Secondary school teachers at Labour-run West Dunbartonshire Council in Scotland struck on Tuesday of this week.
The EIS union members are fighting over a restructure of management positions in five secondary schools.
Each school was shut for the day due to the solid action.
Teachers are fighting back as the council wants to remove some deputy head teachers, and cut principal teachers and pastoral care staff.
The proposals are part of £600,000 cuts and will increase workloads, which are already at unbearable levels.
Nearly 90 percent of EIS union members voted to strike on a 61 percent turnout.
If the council doesn’t back down there could be fresh strikes again in February warned EIS.