Ohio Rev. Code § 3313.16: Special meetings of board.

A special meeting of a board of education may be called by the president or treasurer thereof or by any two members, by serving a written notice of the time and place of such meeting upon each member of the board at least two days prior to the date of such meeting. Such notice must be signed by the official or members calling the meeting. For the purpose of this section, service by mail is good service.