On January 10, teachers at a Seattle high school announced that they would refuse to administer a standardized test they’re required to give to ninth graders.

“We are not troublemakers nor do we want to impede the high functioning of our school,” the teachers at Garfield High School wrote in a letter. But they said they wouldn’t “continue to participate in a practice that harms our school and our students.”

The teachers questioned the validity of the test, Measures of Academic Progress (MAP). They also said MAP “subtracts many hours of class time from students’ schedules each year,” and clogs the school’s computer labs for weeks, making them unavailable for other educational purposes. “This especially hurts students without computers at home,” the teachers wrote.