The province has put into place a system for teacher contract negotiations with hope of avoiding work-to rule actions seen after Ontario imposed a contract framework two years ago.
The NDP helped the Liberals pass their bill in its third reading at the legislature on Monday.
This bill was introduced as part of a promise by Kathleen Wynne when she took over the premier's office to change the way teacher contract negotiations take place.
Education minister Liz Sandals says this paves the way to a much clearer process.
In 2012, unions representing public school teachers and support staff imposed a ban on supervising extra curricular activities because of the framework which was imposed.
Sandals says the government consulted with all sides when trying to craft this new bill.
NDP leader Andrea Horwath calls this the "clean up bill," initially tabled to fix the mess which was caused two years ago with imposed teacher contracts.
Horwath says her party supported the bill so the bargaining process went a little more smoothly.
The bill now just needs royal assent to become law.