(Woodburn, OR) -- The teachers' union in Woodburn overwhelmingly voted in favor of a strike. It's the latest development in a "bargaining crisis" with the Woodburn Public School district. Educators are calling for smaller class sizes, more prep time, and competitive wages. The union noted that 63 Woodburn teachers -- that's one out of every five -- have resigned since the start of the academic year. The strike will begin in nine days if the union and district are unable to reach an agreement.