A warning to parents from the two biggest school boards in the area as educational workers prepare to launch a work-to-rule campaign on Monday.
The union representing secretaries, custodians, educational assistants, early childhood educators and computer technicians, among others, could withdraw some services.
The Lambton Kent and St Clair Catholic District School Boards say they will do what they can to reduce any impact on students.
The job action is in reaction to the Ford government’s move to increase class sizes across the province.
However, talks between the Ministry and union are scheduled to continue over the weekend in the hopes of averting any kind of strike action.