Or my wife, who knew her egyptian history inside out and got laughed at because "she could not name Cleopatra as a female pharaoh". (Cleopatra was greek aristocrat, not a pharaoh)
Needless to say my enthusiasm for math really wasn't the same after that. Or her eagerness for history.
To be totally disconnected from ones peers is a torture no child should be forced to suffer. To be taught by teachers who aren't actually comfortable with their discipline.
And this was 30 years ago in Finland, now touted as one of the best examples in primary education.