Edmonton Public School support workers will go on strike on Thursday.
Ninety-seven per cent of eligible members of CUPE Local 3550 voted in favour of strike action last week.
Strike notice was served on Friday.
“This result shows incredible strength in the membership’s resolve to achieve a fair collective bargaining agreement,” said CUPE Local 3550 President Mandy Lamoureux in a statement.
The strike could include 3,000 support staff.