I work at a library and moms do in fact check out his kids' books who are surprised to learn he was ever anything but a writer. He hasn't really been politically relevant to people under 50 for a decade now.

I mean, you'd hope a teacher would at least do minimum checking, and you'd hope an American history teacher would know the name at least, but if she wasn't trained in history specifically and it was recommended by a trusted source I can honestly see the name not ringing enough of a bell to check. It still doesn't say anything good about her as a teacher though.