Teachers across the province will be on picket lines next Friday.
All four unions have indicated they will be staging a one day walkout on February 21st.
This is the first time all instructors have gone out on strike together.
Up until this point, each individual union has been involved in its own rotating strikes, or one day walkouts.
Ontario English Catholic Teachers Association President Liz Stuart says “if we allow the government to implement its plan fully, thousands of teaching positions and tens of thousands of course options will be lost.”