By Daniel de Vise, The Washington Post, November 3, 2008

Parents and students in a growing number of Washington area schools can track fluctuations in a grade-point average from the nearest computer in real time, a ritual that can become as addictive as watching political polls or a stock-market index.

http://www.washingtonpost.com/wp-dyn/content/story/2008/11/03/ST2008110300587.html