The students rallied outside a school board meeting Tuesday night and rallied to the defense of their teachers inside.
"Why are we being punished, why are we being silenced?" asked one student.
Roughly 125 Foster High students walked out of class earlier this month to protest the war, part of a state-wide effort. But the Tukwila School District is investigating six teachers who may have encouraged the students, including the one who marched out with the kids.
"Even though he is a teacher, he has a right too," said another student.
The district says teachers were warned not to participate, but says this is not about politics but rather student safety.