"He wore it like throughout the school, like in nutrition, lunch, things like that. I don't think that's appropriate," Lance Dantignac told KABC.
"It made me feel like unsafe and threatened," Eliza Dumag told the television station.
Students said the history teacher approved all choices for history projects and costumes that are worn, but added that the approval of a KKK member was troubling.
"It kind of rattled me. It was hard to believe that she would allow a klansman to walk around from her approval,” Trinity Young told KABC. “So, we asked her, and she said that, she compared the Klan to the Black Panther Party, which in my opinion are two different things. So yeah, it was troubling."
In a statement, officials from the Los Angeles Unified School District apologized and did not approve of the costume.
"L.A. Unified and Harbor Teacher Preparation Academy understand the extreme sensitivity around this issue and do not condone or support this type of re-enactment," said district officials, who added that they have begun an investigation.