Support is building for the planned four-day strike at Barnsley College, set to take place from Monday 23 February.
The UCU union members are fighting attacks on their pay and conditions.
The Unite union’s West Yorkshire warehouse branch and the Unison branch at Mid Yorkshire Hospitals each donated £250.
Unison branch secretary, Adrian O’Malley said, “Their support during our admin strike was fantastic. It’s time to repay their solidarity.”
South Yorkshire FBU made a donation of £100.