As Walkam points out,
"Teachers are not on strike. Nor according to the leaders of the two major unions involved, the Elementary Teachers’ Federation of Ontario and the Ontario Secondary School Teachers Federation, do they intend to go on strike.
They may have walked away from province-wide talks with the Liberal government. But as required under Ontario labour law, they have been bargaining with the local school boards that employ them.
Certainly the boards didn’t ask Queen’s Park to step in. Most apparently thought they could reach deals with their employees." (read more here)