The Colorado Virtual Academy, one of K12 Inc.’s biggest schools, has severed its association with the publicly traded corporation. They may continue to use its curriculum but not its management services, starting in 2014.

“The Colorado school has been criticized for its low graduation rates (22 percent in 2011-12, according to state education statistics) and a discovery by state auditors that the school had overcharged $800,000 for 120 students who never attended, weren’t Colorado residents or whose enrollments couldn’t be verified, according to an in-depth 2011 New York Times article.”

But K12 isn’t finished in Colorado. Another online school won approval, and it will engage the corporation.