
    Lillie LEON, Plaintiff-Appellant, v. The NEW YORK CITY DEPARTMENT OF EDUCATION, aka The City School District of the City of New York, Paula Cunningham, in her Individual and Official Capacity, Nerida Urban, in her Individual and Official Capacity, and Harvey Katz, in his Individual and Official Capacity, Defendants-Appellees.
    No. 14-1811.
    United States Court of Appeals, Second Circuit.
    May 22, 2015.
    
      Stewart Lee Karlin, The Law Offices of Stewart Lee Karlin, P.C., New York, N.Y., for Appellant.
    Marta Ross, Assistant Corporation Counsel, for Zachary W. Carter, Corporation Counsel, New York, N.Y., for Appel-lees.
    PRESENT: AMALYA L. KEARSE, BARRINGTON D. PARKER and RICHARD C. WESLEY, Circuit Judges.
   SUMMARY ORDER

Plaintiff-Appellant Lillie Leon appeals from a judgment of the United States District Court for the Eastern District of New York, dismissing her claims against Defendants-Appellees, including the New York City Department of Education and Paula Cunningham, pursuant to the Age Discrimination in Employment Act (“ADEA”), 29 U.S.C. §§ 621 et seq., the Americans with Disabilities Act (“ADA”), 42 U.S.C. §§ 12101 et seq., 42 U.S.C. § 1983, the New York State Human Rights Law (“NYSHRL”), N.Y. Exec. Law § 290 et seq., and other state law and municipal code grounds. We assume the parties’ familiarity with the underlying facts, procedural history, and issues on appeal.

Leon’s discrimination, retaliation, and related claims arise from her employment at P.S. 117 in Queens, NY, for a period prior to the 2010-11 school year and in connection with the 2010-11 school year itself.

We affirm the District Court’s dismissal pursuant to Rule 12(b)(6) of Leon’s claims arising from the period prior to the 2010-11 school year of discrimination and retaliation under the ADEA, the ADA, and the NYSHRL and of failure to accommodate under the ADA. We also affirm the dismissal of all of Leon’s claims of hostile work environment under the ADEA and the NYSHRL arising from the 2010-11 school year and from the period prior to it. Because Leon does not sufficiently argue on appeal that the District Court erred in dismissing her First Amendment retaliation claim under 42 U.S.C. § 1983, she forfeits this argument. See Hicks v. Baines, 593 F.3d 159, 166 n. 5 (2d Cir. 2010); Norton v. Sam’s Club, 145 F.3d 114, 117 (2d Cir.1998).

The District Court also held that a previously-adjudicated finding of just cause for Leon’s termination pursuant to New York Education Law § 3020-a collaterally estops federal litigation of her discrimination, retaliation, and accommodation claims concerning the 2010-11 school year.

Under New York law, the doctrine of collateral estoppel bars re-litigation of an issue when: “(1) the identical issue necessarily was decided in the prior action and is decisive of the present action, and (2) the party to be precluded from relitigating the issue had a full and fair opportunity to litigate the issue in the prior action.” Evans v. Ottimo, 469 F.3d 278, 281 (2d Cir. 2006) (citing Kaufman v. Eli Lilly & Co., 65 N.Y.2d 449, 492 N.Y.S.2d 584, 482 N.E.2d 63 (1985)). The bar can apply even if the tribunals or causes of action differ. LaFleur v. Whitman, 300 F.3d 256, 271 (2d Cir.2002). Section 3020-a findings are entitled to preclusive effect. Burley bile v. Bd. of Educ., 411 F.3d 306, 308 (2d Cir.2005).

The District Court erroneously concluded that the Section 3020-a hearing’s “determination that there was cause for [Leon’s] termination precludes [Leon] from making a prima facie case of discrimination of retaliation,” App. 115. There is no indication that the Section 3020-a hearing addressed, much less “actually decided,” whether the charges leading to Leon’s termination were driven, even in part, by discriminatory or retaliatory intent. The court’s error thus stems from the faulty assumption that termination for cause necessarily precludes the possibility of termination motivated by unlawful animus. “[T]he hearing officer’s determination that [the plaintiff] had engaged in the charged conduct, and that these violations called for h[er] termination, does not preclude a jury from later finding that [the plaintiff] was also terminated at least in part because of [discriminatory reasons]. The plaintiff could be successful on the [discrimination or retaliation] claims even if the jury were to accept that there were legitimate reasons' for terminating h[er], too.” Matusick v. Erie Cnty. Water Auth., 757 F.3d 31, 47 (2d Cir.2014).

Likewise the District Court erroneously concluded that the Section 3020-a hearing’s determination “that Plaintiff did not apply for an accommodation for air conditioning from [DOE’s] Medical Bureau” precludes Leon “from alleging a necessary element of her failure to accommodate claim.” App. 117-18 (internal quotation marks omitted). While Leon is estopped from challenging the Hearing Officer’s factual finding that she failed to apply to the Medical Bureau for an air conditioning accommodation, Leon also alleges that she informed Defendants of her air conditioning-related health concerns and had filed medical documentation to that effect with the school. See App. 25. The overall adequacy of Leon’s accommodation requests cannot be determined based on the Amended Complaint or documents reasonably viewed as incorporated in it.

In sum, as to Leon’s discrimination, retaliation, and accommodation claims under the ADEA, the ADA, and the NYSHRL for the 2010-11 school year, we vacate and remand for further proceedings because the dismissals cannot be justified under Rule 12(b)(6). Our reversal of the District Court on these claims is no indication as to the appropriateness of a later Rule 56 motion following whatever discovery the District Court deems appropriate. '

We also vacate the District Court’s decision not to exercise supplemental jurisdiction over certain of Leon’s state and municipal code claims and remand to the District Court to reconsider its decision in light of the surviving federal claims. We have considered all of Leon’s remaining arguments and find them to be without merit. Accordingly, for the reasons set forth above, the judgment of the District Court is AFFIRMED IN PART, and VACATED and REMANDED IN PART to the District Court for further proceedings consistent with this order. 
      
      . We review de novo a district court's dismissal of a complaint pursuant to Federal Rule of Civil Procedure 12(b)(6), construing the complaint liberally, accepting all well-pled factual allegations in the complaint as true, and drawing all reasonable inferences in the plaintiff's favor. Chambers v. Time Warner, Inc., 282 F.3d 147, 152 (2d Cir.2002). We-also review de novo a district court’s legal conclusion that a state proceeding’s fact-finding of a legitimate basis for employment termination collaterally estops re-litigation of related issues in federal court. Matusick v. Erie Cnty. Water Auth., 757 F.3d 31, 45 (2d Cir.2014).
     
      
      . To the extent that Leon's appeal can be construed to raise a hostile work environment claim under the ADA, see Appellant Br. 43-44, we reject such a claim because it was never pleaded in the Amended Complaint.
     