<p>Grundy County Director of Schools Benny Joe Nunley, 49, was charged yesterday with criminal attempt to commit murder, according to authorities. ''Mr. Nunley has been arrested, and his bond has been set at $20,000,'' said District Attorney General Mike Taylor. The superintendent was taken yesterday afternoon to the Grundy County Jail to be booked. He posted bail about 3:15 p.m., according to jail records.</p>