A teacher, even a substitute has to know what not to say.
“We teach best what we most need to learn.”
—Richard Bach.
If you are....
Teaching about the Joseph Conrad 1897 classic novella “....of the Narcissus.”
Or comedian and activist Dick Gregory’s autobiography “........” published in 1964.
Or the third comedy record LP by Richard Pryor. “That ....Crazy.”
It was recorded live at Don Cornelius’ Soul Train nightclub and came out in 1974.
Then okay.
If not then don’t ever say the word.
I think you misread the article, it was student not teacher who allegedly said the word