Teachers in at least four additional school districts walked out Tuesday, as strikes and protests by educators spread across the state of Washington. Teachers are demanding substantial improvements in pay and school funding. The escalation of the struggle is taking place in defiance of the efforts by the National Education Association (NEA) and its state and local affiliates to isolate walkouts and prevent a statewide strike. Picket lines of educators went up Tuesday morning in Stanwood-Camano, 50 miles north of Seattle, and Rainier, Tumwater and Centralia, all located south of the state capital of Olympia. The strikes led to the cancellation of classes for thousands of students scheduled for the first day of school on Tuesday and Wednesday.