Investigation into APS cheating finds unethical behavior across every level, America's biggest teacher and principal cheating scandal unfolds in Atlanta

Teachers have a cheating party to modify tests, increase students test scores, and bring up the average score so their teaching does not look so incompetent. 

source: http://www.ajc.com/news/investigation-into-aps-cheating-1001375.html

source1: http://www.csmonitor.com/USA/Education/2011/0705/America-s-biggest-teacher-and-principal-cheating-scandal-unfolds-in-Atlanta