As the kids head back to school, start your own social-studies class by signing up for a free daily e-mail from Reference.com telling you what happened “On This Day” in history (www.reference.com/thisday). When you tell your Little Leaguer that in 1920, on his September 27 birthday, eight Chicago White Sox were charged with fixing the 1919 World Series, he'll remember that you really are the smartest woman in the world.