COLUMBUS, Ohio (WTVN)-- The Ohio Department of Education has notified the Columbus City School district that at least two years worth of state report cards need to be corrected, after the data used to determine the grades was found to be manipulated. 

The information is from at least the 2010-11 and 2011-12 report cards, and officials say they are investigating the data for the 2012-13 school year as well.

It goes back to the attendance-rigging scandal, which the state Auditor investigated, beginning in 2011. As a result, principals for several Columbus high schools were disciplined.