Premier Kathleen Wynne made no promises when asked Wednesday whether the Liberals would restore benefits Ontario's public school teachers lost two years ago as they head into new contract talks.

The governing Liberals imposed new contracts on teachers in 2012 that froze some of their wages and limited their ability to strike.

Delegates attending the Elementary Teachers' Federation of Ontario (ETFO) annual meeting had some pointed questions for Wynne, including one who complained that he was robbed of $10,000 in unused sick days.

The 2012 bill which froze pay and limited teachers' ability to strike is "arguably the most draconian, anti-democratic, anti-labour legislation that was ever passed," said York Region ETFO rep David Clegg. 

"Will you undo and restore to the teachers of this province all that your party took from us, yes or no?," Clegg added. 

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An attendee at the annual meeting of the Elementary Teachers' Federation of Ontario holds a sign, which refers to two bills passed by the Ontario government, which froze teachers' pay and reformed their collective bargaining. (CBC)

​Wynne — a former school board trustee — says she is committed to the collective bargaining process but would not say what's on the table.

She insists, however, that there's no new money for compensation, as the province struggles to slay a $12.5-billion deficit.

"We cannot allocate new money for compensation increases," Wynne told the crowd. 

The provincial government is headed into talks with the province's teachers, whose contracts expire on Aug. 31.

"We're looking forward to getting to the negotiating table, where we can deal with all the issues in a respectful way, including salaries," ETFO president Sam Hammond told reporters.

The labour conflict two years ago, which included the loss of extracurricular activities, was "not a successful" bargaining process, Wynne said.

"I'm not going to debate particular items," she said. "I think there's going to be lots of discussion at the bargaining table about a whole range of issues, and that's where I want that discussion to happen." 

With files from CBC's Mike Crawley