OPINION OF THE COURT
Thе issues are whether petitioner, a tenured elementary school teacher, acquired tenure by estoppel as a special education high school teacher and, if so, whether her resignation submitted to respondents under the parties’ mistaken belief that she had not yet acquired tenure precludes her from regaining her teaching position. We conclude that petitioner acquired tenure by estoppel and that her resignation is without legal effect under the circumstances of this cаse. Accordingly, we reverse the order of the Appellate Division.
I
Petitioner Susan Gould achieved tenure under the Education Law in 1965 as a "common branch” elementary school teacher in a New York City District. In her application to teach in respondent Sewanhaka Central High School District, she indicated that she had been previously tenured. On September 1, 1986, she was appointed to a three-year probationary term as a special education teacher at a high school in respondent District. By letter dated February 24, 1989, six months before the expiration of her three-year probationary term, petitioner was advised that at the April 25, 1989 School Board meeting the Superintendent of Schools would recommend that her probationary appointment be terminated as of June 23, 1989. Petitioner requested and later received a statement of reasons for the Superintendent’s recommendation.
On April 12, 1989, petitioner met with the Superintendent to review the reasons for the denial of tenurе. She asked "whether it was true that if she resigned, there would be nothing in her file” referring to the negative tenure recommendation. The Superintendent assured her that this was true and that she would have to submit her resignation with enough lead time for the Board to act upon it аt its April 25 meeting. The next day, petitioner submitted her resignation for "personal reasons” effective June 30, 1989 and her resignation was accepted by the Board at its April 25, 1989 meeting.
When she submitted her resignation and when the Board accepted it, petitioner аnd respondents assumed that peti
Petitioner commenced a CPLR article 78 proсeeding seeking reinstatement as a teacher on the grounds that the Superintendent and the School Board had acted arbitrarily and capriciously in accepting petitioner’s resignation and refusing to treat the resignation as a nullity. Supreme Court grаnted the petition and reinstated petitioner as a tenured teacher with back pay and benefits, reasoning that her resignation was of no legal effect because if "she had known the true facts, that she was already tenured, the resignation would havе never been tendered”. The Appellate Division reversed and dismissed the proceeding, stating that "absent a showing of fraud, duress, coercion, or other affirmative misconduct on the part of school officials which renders a resignation involuntary, a rеsignation cannot be withdrawn once it has been accepted by school authorities” (Matter of Gould v Board of Educ.,
II
Education Law § 3012 (1) (a) states:
"Teachers * * * shall be appointed * * * for a probationary period of three years; provided, however, that in the case of a teacher who has been appointed on tenure in another school district within the state, * * * and who was not dismissed from such district or board * * * the probationary period shall not exceed two years” (emphasis added).
The language of the section is plain and the meaning unambiguous. Because of petitioner’s previous tenure in New York City, the acquired term of her probationary service had been reduced from three years to two years. The statute itself is self-executing. It makes no difference that her tenured status
Tenure by estoppel "results when a school board fails to take the action required by law to grant or deny tenure and, with full knowledge and consent, permits a teacher to continue to teach beyоnd the expiration of [the] probationary term” (Matter of Lindsey v Board of Educ.,
Respondents’ principal contention is not that petitioner failed to acquire tenure by estoppel, but that her resignation was voluntary and, therefore, irrevocablе. They argue that there is no claim of duress, coercion or fraud and that there is no other basis on which to nullify it. We disagree.
A tenured teacher has a protected property interest in her position and a right to retain it subject to being discharged for сause in accordance with the provisions of Education Law § 3020-a (see, Kinsella v Board of Educ.,
Petitioner argues that her resignation is tantamount to a waiver of her proteсted tenure rights and to be effective must, under familiar principles, constitute a voluntary relinquishment of known rights (see, Werking v Amity Estates,
These established waiver principles have been applied in various contexts (see, e.g., Feinerman, supra, at 497-498 [waiver of teachеr’s right to be appointed to probationary term in tenure-bearing position]; Abramovich, supra, at 455 [waiver of protection afforded tenured teacher under Education Law § 3020-a]; Werking, supra, at 52 [action to rescind tax deed, no waiver of tax collector’s failure to comply with statute]; Rochester, supra, at 197 [action to set aside condemnation award, no waiver of objection to conflict of interest of condemnation commissioners]; Miller v Greyvan Lines,
Generally, a contract entered into under a mutual mistake of fact is voidable and subject to rescission (see, Coffin v City of Brooklyn,
The Superintendent advised petitioner at their meeting on April 12, 1989 that if she submitted her resignation in time for the Board to act on it by April 25, 1989, no informаtion regarding the tenure denial would remain in her employment file. To avoid having such material kept in her file, petitioner submitted her resignation the following day and the Board accepted it at its April 25 meeting. The discussion between petitioner and Superintеndent on April 12 and the subsequent actions of petitioner in submitting her resignation and the Board in accepting it were all premised on a mutual mistake of fact as to a critical element: that petitioner was only a probationary employee. Where, as here, such a misconception concerning a critical aspect of petitioner’s employment pervades the entire transaction, we conclude that the general principles of mutual mistake in the formation of contrаcts provide an additional related basis for treating petitioner’s resignation as a nullity.
Respondents argue, however, that petitioner’s resignation should be effective because they are blameless in the matter, there is no claim qf fraud or duress, and bеcause they, like petitioner, were totally unaware that by holding over in her
Nor does respondents’ innоcent unawareness of the facts alter the effect of the critical point: that the resignation was submitted and accepted under a fundamental misassumption as to the position petitioner was relinquishing. Respondents’ argument necessarily comes to this: as between petitioner and the Board, it was petitioner, rather than the Board, who had the responsibility of understanding the legal effect of Education Law § 3012 on her employment status. Respondents cite no authority for their proposition. The argumеnt overlooks the fact that respondents gave nothing in return for petitioner’s resignation and that the only rights to be lost as a consequence of the mistake were those of petitioner. To accept respondents’ argument, we believe, would сonflict with our Legislature’s firm policy of safeguarding teachers’ tenure rights (see, Ricca, supra, at 391; Baer, supra, at 299).
The cases cited by respondents’ are distinguishable (see, Girard, supra; Roman, supra; Matter of Cannon v Ulster County Bd. of Coop. Educ. Servs.,
Accordingly, the order of the Appellate Division should be reversed, with costs, and the judgment of Supreme Court, reinstated.
Chief Judge Kaye and Judges Simons, Titone, Bellacosa and Smith concur.
Order reversed, etc.
