Last July, I wrote about a struggling high school in D.C. where 100% of the seniors graduated and were accepted by colleges. The story appeared on NPR, and I wrongly assumed that they had done fact checking. I am not a reporter, and I do not have a staff to check out claims. NPR does. But they took the claim by D.C. administrators at face value, without checking.

Now NPR reports that the original story was fishy. Better late than never.

“An investigation by WAMU and NPR has found that Ballou High School’s administration graduated dozens of students despite high rates of unexcused absences. WAMU and NPR reviewed hundreds of pages of Ballou’s attendance records, class rosters and emails after a DCPS employee shared the private documents. The documents showed that half of the graduates missed more than three months of school last year, unexcused. One in five students was absent more than present — missing more than 90 days of school.”

“According to DCPS policy, if a student misses a class 30 times, he should fail that course. Research shows that missing 10 percent of school, about two days per month, can negatively affect test scores, reduce academic growth and increase the chances a student will drop out.”

The majority of the graduating class missed more than six weeks of school.

So now we understand how the reformers in charge of the DC school system got the graduation rate up. By lowering standards. By lying.

Remember Campbell’s Law.

“The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor.”

When you reward schools for higher scores, they will get higher scores, by hook or by crook. When you reward them for higher graduation rates, they will do what it takes—including lowering standards—to reach the goal.