State Schools Superintendent Stan Heffner will officially resign this Friday amid ethical questions about his work for an educational testing contractor. Heffner's two-sentence resignation letter was released Saturday by the state Education Department. No reason for his departure was given in the letter that came days after Inspector General Randall Meyer found Heffner was on the payroll of a Texas-based testing firm when he lobbied Ohio lawmakers last year on a bill that benefited the company. Deputy Superintendent Michael Sawyers will become acting superintendent.