DAVENPORT, Iowa (AP) — A teacher in an Iowa district that has been criticized for discriminating against minorities says she regrets wearing blackface for a Halloween costume and that she didn’t know it is offensive. The Davenport school district has said its investigating teacher Megan Luloff , who wore the makeup for her costume when she attended an Oct. 19 party unconnected to her job.

Her attorney said in a letter Wednesday that Luloff had never heard the term blackface, didn’t know its history or “how hurtful it is to all African-Americans.” The letter also says Luloff regrets her actions. A district spokeswoman Thursday would confirm only that Luloff remains employed. The district is under state supervision because a disproportionate number of minority students have been identified for special education and subjected to discipline.