A spokesman says additional complaints have prompted Ohio to expand its review of an embattled charter school chain to two additional cities. The Ohio Department of Education was already investigating a Dayton-area Horizon Academy, after teachers shared accounts in July of sex games, test tampering and other potentially criminal misdeeds. Spokesman John Charlton said Tuesday that the state received additional complaints about Columbus and Cincinnati schools run by the same operator, Chicago-based Concept Schools, after that meeting. Charlton said the complaints have been referred to the appropriate regional offices for further review. He said that didn't constitute a formal investigation. An estimated 400 supporters of Horizon and Noble academies were in Columbus Tuesday to rally at the Statehouse and testify before the state school board.