Charlotte-Mecklenburg School officials said it's too early to judge the full effect of closing nearly a dozen schools last year.
The board got its first report on the closings Tuesday night.
CMS said it did achieve the millions in savings it had promised.
But other data shows new over-crowding at some schools, and dramatic drops in test scores at others.
"For me the questions is, 'Ok, now what, so what? What will we do with what we've learned?'" Board Chairwoman Ericka Ellis-Stewart said. "How will we use that information to better influence and to better teach our students?"
The report did not include data about increased suspensions.
CMS said it's waiting on state numbers before making that report.