A public school in Louisiana allegedly advised a Buddhist family to change their beliefs if they didn’t want their child to face harassment from zealous teachers.

The American Civil Liberties Union and the ACLU of Louisiana on Wednesday filed a federal lawsuit against Negreet High School in Sabine Parish on behalf of two parents, Scott and Sharon Lane, and their son, “C.C.” The lawsuit claims the school has “a longstanding custom, policy, and practice of promoting and inculcating Christian beliefs,” including the teaching of creationism....