I found an advantage of a unified school system!

Unified cheating in Albany:
The Herald learned that Murfree and Coleman had been invited by Bowers, who is heading an investigation to determine whether there had been cheating on the DCSS’s 2009 Criterion-Referenced Competency Test exams.
and Atlanta:
An investigative panel has recommended that 109 principals, assistant principals, school-based testing coordinators and teachers face further scrutiny or sanctions after it found evidence of suspected cheating at 58 Atlanta Public Schools.
Atlanta and Albany have unified school systems, and they have cheating scandals. Coincidence? I think not.

-jsq