The short answer is not much.
Illinois has already been moving beyond the No Child Left Behind law for some time, even as it waited for permission from the federal government.
Matt Vanover, a spokesman for the Illinois State Board of Education, says there were problems with No Child Left Behind.
"It was punitive in nature in that if a school's students didn't make certain performance benchmarks, then the school would be penalized, there'd be less flexibility to meet the local need."
Now, Illinois will use a multitude of factors to assess schools -- not just test scores. The state also adopted different learning standards for English, math, and other subjects; and it's been implementing a new system for evaluating teachers.