LITTLE ROCK, Ark. (AP) — A federal judge has ruled Arkansas cannot prevent two high school teachers from discussing critical race theory in the classroom, but he stopped short of more broadly blocking the state from enforcing its ban on “indoctrination” in public schools.

U.S. District Judge Lee Rudofsky issued a narrow preliminary injunction Tuesday evening against the ban, one of several changes adopted under an education overhaul that Republican Gov. Sarah Huckabee Sanders signed into law last year.

The prohibition is being challenged by two teachers and two students at Little Rock Central High School, site of the 1957 desegregation crisis.

In his 50-page ruling, Rudofsky said the state’s arguments make it clear the law doesn’t outright “prevent classroom instruction that teaches, uses, or refers to any theory, idea, or ideology.”