What is wrong with Miss Rayburn?

One of my favorite websites is Shorpy: The 100-Year-Old Photo Blog. They have these amazing pictures from a century of photography -- Okies heading West, beauty contest winners circa 1922, family photos hidden by holocaust victims. Something new and interesting every day. And then there's this one, where we find out just what was in one of those notes Theodore "Beaver" Cleaver brought home from his teacher.