05/25/2011 05:26 pm ET | Updated Jul 25, 2011

Denver's North High School: Concerns Over Possible Cheating By Students

In 2008, North High School had the lowest graduation rate among Denver's eleven traditional public high schools. Just 46 percent of its seniors managed to graduate that year. And the problem was nothing new.

North has been the target of reform efforts for years, prompted by low test scores, a shrinking student body and the abysmal graduation rate. Denver Public Schools has tried one improvement strategy after another, including changing principals, firing teachers and switching out its academic program and grading structure.