Ontario teachers strike at Stratford Central School in Stratford, Ont. on Dec. 10, 2012. (Dave Chidley/CP).
Ont Teachers 20121210
Teachers from the Avon Maitland school board carry picket signs at Stratford Central School in Stratford, Ont., Monday, December 10, 2012. Tensions between teachers and the Ontario government are set to escalate Monday as elementary teachers begin a wave of one-day walkouts while their high school counterparts cut out extra-curricular activities. THE CANADIAN PRESS/Dave Chidley