Maria Cantu was a special education teacher under a one-year contract with the San Benito School district for the 1990-1991 school year. On Saturday, August 18, just weeks before fall-term classes were to begin, she hand delivered a letter of resignation to her supervisor. Late Monday afternoon the superintendent put in the mail a properly stamped and addressed letter to Cantu accepting her offer of resignation. The next morning at 8:00, before the superintendent's letter reached her, Cantu hand delivered a letter withdrawing her resignation. The superintendent refused to recognize the attempted rescission of the resignation. Decide. [Cantu v. Central Education Agency, 884 S.W.2d 563 (Tex. App.)]