A middle school teacher in Florida who has admitted hosting a white nationalist podcast has been removed from her classroom as officials investigate whether she is really a racist.

Officials at the Citrus County School District, about 80 miles north of Tampa, Fla., said they were made aware of the podcast, called “Unapologetic,” last week after being contacted by HuffPost. The news website reported on Saturday that the teacher, Dayanna Volitich, was connected to the podcast.

Although the podcast and a Twitter account — which Ms. Volitich operated under the pseudonym “Tiana Dalichov” — appear to have been taken off the internet, the HuffPost report included a recording of the podcast and screenshots of tweets she sent.

On the podcast, she argues that “science” has proved that certain races are smarter than others and brags about preaching white nationalism in her classroom — and hiding it from administrators. In tweets, she makes reference to the “horrors of #Islam,” attacks the concept of white privilege, and says that it isn’t “hateful or supremacist to prefer your own people over others.”