NEW: A school administrator in Southlake, Texas, advised teachers last week that if they have a book about the Holocaust in their classroom, they should also have a book with an “opposing” perspective.

Listen to the audio recording obtained by @NBCNews: https://t.co/vS0IjlROMu pic.twitter.com/yPtM1ncjgV

— NBC News (@NBCNews) October 14, 2021