Do school administrators cause poor school performance? Or does poor school performance cause school administrators? Download data from Texas (the Meier, Polinard, and Wrinkle item) here, and find out. Fun for the whole family!! (Note: the authors say causality runs in the second direction. But it's best you brush up on testing for Granger causality in panel data before starting.)
"Fighting ignorance since 1973. (It's taking longer than we thought.)" The one. The only. The Straight Dope.