Florida's education commissioner has announced his resignation.
Tony Bennett's announcement Thursday came three days after The Associated Press revealed he had changed the grade of a charter school run by a major Republican donor during his previous job as Indiana's school chief.
He again denied wrongdoing but said he didn't want to be a distraction to Florida Gov. Rick Scott's efforts to overhaul the state's education system.
Emails published by the AP this week show that Bennett and his Indiana staff scrambled last fall to ensure Christel DeHaan's school received an A, despite poor 10th-grade algebra scores that initially earned it a C.
Bennett lost his re-election bid last November in Indiana. He was hired by Florida in December.