Ontario teachers have been without a contract since Aug. 31 and months of negotiations have yielded little progress. Bargaining is now at a standstill between the provincial government and all four major teachers' unions.

Ontario's fiscal watchdog says the provincial government's decision to increase class sizes will result in approximately 10,000 fewer teachers in schools over the next five years.

The union representing Ontario's Catholic school teachers has filed a complaint against the provincial government with the Ontario labour relations board over recent changes to class sizes.

The parents are part of a network of advocacy groups fighting to stop cuts to public education and include Ontario Families for Public Education, Scarborough Families for Public Education, West End Parents for Public Education and several others.

The government announced in the spring that high school class sizes would rise from an average of 22 to 28 students over four years.

Almost two thirds of the job losses, 79 in total, would affect public high school teachers.

The government passed legislation Wednesday that will require all aspiring teachers in Ontario to pass a math test before receiving their licence to teach.

Lisa Thompson announced last month that average high school class sizes will increase by six students - from 22 to 28 - a change to be phased in over four years.

Lisa Thompson says larger class sizes will enable more group work and build skills that employers want.

Budget cuts that will increase class sizes in Ontario schools may be a bridge too far for teachers and administrators alike, Bill Kelly says.