Teachers say there's nothing else they can do, so they staged a preemptive strike before a potential strike if no deal comes by Monday.
Both sides are at odds over compensation and elementary school class size.
"It's very hard to get to all the children who need your help when you have that many 8 year olds, 9 year olds in your class," Lisa Radmer, SVEA Union President says.
Classes remained scheduled for Monday, but teachers have voted to strike if there's no deal by 3 o'clock Sunday afternoon.
"We are going to remain optimistic until then, and we still have the whole weekend," Carolyn Malcolm, District Spokeswoman says. "We're very committed to the bargaining process."
The bargaining has continued into Friday evening, and both sides are hopeful they'll find a compromise.
"We're settling in just like we would any other year, because I firmly believe we'll be here," Kelsey Carr, first grade teacher says. "We'll come to an agreement, we'll do what's best for the kids."