From Chicago Tribune:

The federal government recently decided to allow Illinois to be exempt from certain requirements of the No Child Left Behind Act of 2001. As a result, there will be a new school rating system, which will be rolled out in 2014-15. The new system will tell parents at a glance how well schools are doing and the new rating will take into account a variety of measures, including graduation rates, minority performance, state exam scores, and progress in improving scores.