The union ignored their wishes, the teachers would rather have had the wage freeze than layoffs since the laid off teachers were given no notice of the layoffs:

The teachers, who gathered outside their union office, said they want a response from the union and put their demands in writing in the form of a petition.
Those speaking out said it shouldn’t have reached this point, and they would have accepted the district’s offer, favoring a wage freeze to save jobs.
“We took a poll in the spring and they got our opinion and the majority said wage freeze,” said Monica Whiteley, who was laid off. “So I would like them to look at the poll or honor it and have us look at the memo of understanding that is out there.”

And the union is still not listening:

Negotiations started again Thursday at 11 a.m., but there was still no agreement. When the union was asked whether they would take a poll or vote, they said they would have to wait and see.

(via)