[Education Week] The national graduation rate is not the widely broadcast 85 percent. This Education Week commentary corrects the math and reveals the correct figure as much closer to 68 percent. More alarming, minorities nationwide have little more than a 50-50 chance of earning a diploma. We have the No Child Left Behind Act to thank for the unpleasant discovery of low graduation rates. Prospect for the future, however, may not be altogether bleak. Despite a lax regulatory stance now, no legal impediments bar the Department of Education from getting tougher in the future.