middle school social studies likes censorship

my child has to write an essay on a famous black american for black history month. i shared a breitbart article, but my son said his teacher wouldn't accept it as a source. he referred to a handout she provided at the beginning of the year.

in case you are wondering what happens to your child at school…

https://www.breitbart.com/politics/2021/02/22/clarence-thomas-dissent-election-cases/#