A group of teachers and students in Arkansas is suing the state over a law that was used to restrict an advanced placement African American studies course. They say the law is vague and creates a chilling effect because it tries to limit how race is talked about in classrooms.

Ruthie Walls, a history teacher at Central High School in Little Rock, is one of a handful of educators who teach AP African American Studies. Last August she was preparing for the school year, when she found out her class was canceled by the state.

“No one wants to get news like that,” she said. “I was taken off guard and I had to continue with the day.”

Plaintiffs discuss ongoing lawsuit against Arkansas critical race theory ban