Teachers at Merriwa Central School have walked off the job over staffing shortages.
Teachers have reportedly been forced to teach classes outside their areas of qualification because of the chronic shortage.
NSW Teachers Federation Deputy President Henry Rajendra said staff were angry.
“The school is unable to back-fill a qualified science teacher position and there are constant shortages of casual teachers,” Mr Rajendra said.
“On top of that Merriwa Central School has been unable to spend its COVID staffing supplement because there simply aren’t local teaching staff to employ.”
Mr Rajendra said it’s a growing issue across the state for all public schools.