But OSSTF president Ken Coran says the meeting is informal and only meant to exchange information.
A spokesperson with the francophone AEFO also said the meeting "does not constitute a return to the bargaining table."
The unions raised the prospect of a fall strike after a settlement was reached with the Catholic teachers' unions.
Among its concessions, the contract would not allow teachers to keep banking sick days, and their allotment of 20 sick days a year would be cut to 10.
Sick days already banked will be protected and can be cashed out at retirement, however.