A quick read of the article strongly suggests the teacher had no clue how to recognize a teachable moment and nothing of value to teach anyway.
By way of contrast, my mom was a first grade teacher in a school full of poor and minority kids and she handled the pledge with delicate aplomb, explaining to her six year olds that the words "with liberty and justice for all" described what we wanted the country to be like and what we hoped would be true, even if it was not always true.
― A is for (Aimless), Monday, 18 February 2019 19:26 (five years ago) link