During his time in Texas, Williams oversaw the state's shift to new academic standards and new assessments, and had disputes with the Education Department over the state's NCLB waiver.
Has any state cracked the code when it comes to turning around schools that have been foundering for decades?
Some of the suits have been filed in state courts, other in federal courts, mainly on constitutional grounds that the systems violate equal-protection guarantees.
"Our description of Level 3 and above as reflecting students being 'on track for college and career readiness' was in error," Arkansas chief Johnny Key said in his statement.
Arkansas joins Ohio as a state that will report PARCC scores differently than the testing consortium when it comes to student performance.
Indiana's schools chief Glenda Ritz asked the U.S. Department of Education on Friday to clarify guidelines for distributing federal funding to charter schools with large numbers of low-income students.
The department was initially really strict when it came to teacher evaluation, but it has become much more flexible recently.
On average, North Carolina voters whose local school failed to make AYP had higher turnout in the next school board election by 5 to 8 percentage points, according to a Duke University study.
Gov. Andrew Cuomo, a Democrat, announced the Common Core Task Force on Sept. 28. It will study the standards and aligned exams and make those recommendations by the end of 2015.
The Classrooms First Initiative Council published its initial recommendations to change the K-12 funding formula earlier this month.