I strongly debated on including school based myths, but wasn't sure how to go about researching. I'll do some digging and see if I can't make an update

Southern schooled in 80s & 90s, here. They let us believe John Wilkes Booth was a lone actor and not part of an organized plot by southern men to assassinate the president.

The first time one of my northern friends mentioned that bit about a conspiracy, my little naive mind was rocked that schools might bend or bury the truth.

The rest of the list was pretty accurate. Except nurses in schools was a Hollywood myth to me. There was no budget for such positions. We could go to the school office and ask to call our parents if we weren't feeling well, and we'd better be feeling pretty awful.