
286 S.W.3d 392 (2008)
The DONNA INDEPENDENT SCHOOL DISTRICT, et al., Appellants,
v.
Damon GRACIA, Appellee.
No. 13-07-00255-CV.
Court of Appeals of Texas, Corpus Christi-Edinburg.
October 23, 2008.
*393 Charles Willette Jr., Willette & Guerra, L.L.P., Melanie A. Moore, Brownsville, for appellants.
Carlos Quintana, McAllen, for appellee.
Before Chief Justice VALDEZ and Justices GARZA and VELA.

OPINION
Opinion by Chief Justice VALDEZ.
The Donna Independent School District, the Donna Independent School District Board of Trustees, and Joe Gonzalez, superintendent of schools, (collectively referred to as "the District") bring this interlocutory appeal of the trial court's denial of the District's plea to the jurisdiction of a suit filed by Damon Gracia, appellee. See TEX. CIV. PRAC. & REM.CODE ANN. § 51.014(a)(8) (Vernon 2008). By a single issue, the District contends that the trial court erred in not dismissing Gracia's suit because it enjoyed sovereign immunity from suit. We reverse and render a dismissal for lack of jurisdiction.

I. BACKGROUND
Gracia was employed by the District as a teacher and freshman football coach. In February 2005, a criminal investigation of hazing allegations in the high school boys' athletic department was initiated. The investigation implicated Gracia, and the District suspended him. The District later notified Gracia that his teaching contract for the following year would not be renewed. In response to the District's actions, Gracia requested a hearing examiner under the education code. See TEX. EDUC. CODE ANN. § 21.253 (Vernon 2006).
Before a hearing could take place, the District and Gracia entered into a settlement agreement. In the agreement, Gracia promised to tender a letter of resignation for his teaching contract and a motion to dismiss the hearing that he had requested. In return, the District promised to provide a neutral recommendation to prospective employers who inquired about Gracia's employment history with the District. The agreement contained a "miscellaneous" provision, that stated:
Nothing contained in this Agreement shall constitute an acknowledgment that either DISD or Teacher have violated any laws, breached any agreements or acted improperly with respect to Teacher's employment or termination of employment, [sic] with DISD. Teacher agrees and acknowledges that DISD, by entering into this Agreement and fulfilling its obligations hereunder, is not and shall not be considered an admission of any liability or wrongdoing by DISD. DISD agrees and acknowledges that Teacher, by entering into this Agreement and fulfilling its obligations hereunder, is not and shall not be considered an admission of any liability or wrongdoing by Teacher.
The agreement was executed by the parties on May 11, 2005. On May 19, 2005, Gracia was arrested.
Gracia sued the District for breach of contract, promissory estoppel, and negligence.[1] The District answered with a general denial. Later, the District filed a plea to the jurisdiction. After considering the District's plea to the jurisdiction and Gracia's response, the trial court denied the plea. This interlocutory appeal followed.[2]


*394 II. DISCUSSION

A. Standard of Review
A plea to the jurisdiction is a proper way to challenge the subject-matter jurisdiction of the trial court. See Tex. Dep't of Transp. v. Jones, 8 S.W.3d 636, 638-39 (Tex.1999) (per curiam); City of Waco v. Williams, 209 S.W.3d 216, 219 (Tex.App.-Waco 2006, pet. denied). Whether a trial court has subject-matter jurisdiction is a question of law subject to de novo review. See Tex. Natural Res. Conservation Comm'n v. IT-Davy, 74 S.W.3d 849, 855 (Tex.2002). In a case involving sovereign immunity, the court looks to the plaintiff's pleadings and any relevant evidence to decide whether sovereign immunity has been waived. Tex. Dep't of Crim. Justice v. Miller, 51 S.W.3d 583, 587 (Tex.2001); Tex. Natural Res. Conservation Comm'n v. White, 46 S.W.3d 864, 868 (Tex.2001).

B. Breach of Contract
In the District's plea to the jurisdiction, it argued that Gracia's breach of contract claim was barred by sovereign immunity and that the local government code's waiver of sovereign immunity dealing with contracts did not apply because the agreement was not a contract for goods and services. See TEX. LOC. GOV'T CODE ANN. §§ 271.151(c), 271.152 (Vernon 2005). Section 271.152 waives sovereign immunity for local governmental entities that enter into contracts that are "subject to this subchapter." Id. § 271.152. A contract subject to the applicable subchapter "means a written contract stating the essential terms of the agreement for providing goods or services to the local governmental entity...." Id. § 271.151(c). Gracia responded by arguing that the agreement resolved a termination dispute that was premised on Gracia's teaching contract; therefore, the agreement involved a contract for services and waived the District's sovereign immunity. The concurrence subscribes to the District's argument, and it would bar Gracia's suit because it believes that the underlying agreement is not premised on a contract for services.
The issue, however, hinges on Gracia's underlying claim. The Lawson case is the prism through which we should view how breach of contract claims implicate sovereign immunity. Tex. A & M Univ.-Kingsville v. Lawson, 87 S.W.3d 518 (Tex.2002). In Lawson, a university faculty member sued his employer for violations of the Whistleblower Act. Id. at 518-19.[3] A settlement agreement was reached between the parties; however, a dispute arose shortly after the agreement was reached. Id. at 519. The faculty member sued the university for breach of contract, and the university responded by filing a plea to the jurisdiction. The Texas Supreme Court, in a plurality opinion, held that when a governmental entity agrees to settle a lawsuit from which it is not immune, it is not immune from a suit for breach of the settlement agreement. Id. at 518.
In rationalizing its decision, the supreme court noted that contractual claims against governmental entities may be generally categorized as claims for which immunity is waived and claims for which an administrative *395 remedy is provided. Id. at 521. An action for a breach of a settlement agreement, however, does not neatly fall into either category. Id. The Lawson plurality found that:
Allowing suit against the government for breach of an agreement settling a claim for which immunity has been waived does not interfere with the Legislature's policy choices. On the contrary, having determined to allow suits on such claims and prescribed the available remedies, the Legislature must surely have consideredindeed, hopedthat claims would often be settled. If anything, for the government to be immune from the enforcement of such settlements would impair the purposes of the waiver by limiting its effectiveness in cases not tried to a final judgment.
Id. at 522. Basing its decision on legislative intent, the plurality rejected the appellate court's waiver-by-conduct rationale, but ultimately affirmed the lower court's decision to allow Lawson's suit to proceed. Id. at 522-23.
Unlike Lawson, Gracia did not have a statutorily recognized claim pending in the trial court when he entered into an agreement with the District. The settlement agreement in this case was executed just as Gracia was instituting the administrative process that the State created for challenging the termination of teaching contracts. In short, Gracia settled a claim that, at that point in time, had no adjudicative value in our court system. If Gracia's allegations are true, it strikes us as unfair to allow the District to renege on its promises without facing the legal consequences of its alleged actions.[4] The Texas Supreme Court, however, has forestalled the waiver-by-conduct exception to sovereign immunity in situations where an administrative remedy is available. See IT-Davy, 74 S.W.3d at 857 ("Creating a waiver-by-conduct exception would force the State to expend its resources to litigate the waiver-by-conduct issue before enjoying sovereign immunity's protectionsand this would defeat many of the doctrine's underlying policies."). Thus, the trial court erred in not dismissing Gracia's breach of contract claim.

C. Promissory Estoppel
The District argues that Gracia's promissory estoppel claim is also barred by sovereign immunity because the legislature has not provided a clear and unambiguous waiver of such claims. In response, Gracia argued that equitable principles allowed his claim to proceed. The general rule is that, when a municipality or other unit of government is exercising its governmental powers, it is not subject to estoppel. City of Hutchins v. Prasifka, 450 S.W.2d 829, 835 (Tex.1970). However, a municipality may be estopped in certain cases where justice requires the application of estoppel and there is no interference with the exercise of the municipality's governmental functions. Id. at 836 (citing City of Dallas v. Rosenthal, 239 S.W.2d 636 (Tex.Civ.App.-Dallas 1951, writ ref'd n.r.e.)). This exception is to be applied with caution and only in exceptional cases *396 where the circumstances clearly demand its application. Id.
The City of Hutchins exception is narrow and has been applied to municipalities in zoning and permitting cases where sovereign immunity was not a central issue. Id. (zoning case); Maguire Oil Co. v. City of Houston, 69 S.W.3d 350, 367-370 (Tex. App.-Texarkana 2002, pet. denied) (drilling permit case). It has not been applied to cases involving school districts and implicating sovereign immunity. Gracia did not offer, and we cannot find, any reason to extend this exception to the instant case. See Lamesa Indep. Sch. Dist. v. Booe, 251 S.W.3d 831, 834 (Tex.App.-Eastland 2008, no pet.) (op. on remand) (holding that sovereign immunity barred estoppel or quantum meruit claims for monetary damages) (citing IT-Davy, 74 S.W.3d at 860); see also Nussbaum v. Univ. of Tex. Med. Branch at Galveston, No. 01-99-00871-CV, 2000 WL 1864048, at **3-4, 2000 Tex. App. LEXIS 8549, at **8-9 (Tex.App.-Houston [1 Dist.] Dec. 21, 2001, pet. denied) (not designated for publication) (providing that a claim for promissory estoppel is similar to a contract claim and is governed by the doctrine of sovereign immunity). The trial court, therefore, should have dismissed Gracia's promissory estoppel claim.

C. Negligence
Gracia's final claim was that the District was negligent in ignoring the terms of the agreement and pursing a criminal investigation of his alleged conduct when the agreement provided otherwise. The Texas Tort Claims Act waives a governmental unit's sovereign immunity for property damage and personal injury proximately caused by the wrongful act or omission or the negligence of an employee acting within the scope of her employment if (1) the damage or injury arises from the operation or use of a motor-driven vehicle and (2) the employee would be personally liable to the plaintiff according to Texas law. See TEX. CIV. PRAC. & REM.CODE ANN. §§ 101.021, 101.051 (Vernon 2005). Gracia's negligence claim does not fall within the legislature's limited waiver of sovereign immunity for property damage and personal injury. The trial court should have dismissed Gracia's negligence claim.
The District's sole issue is sustained.

III. CONCLUSION
We reverse the trial court's order denying the District's plea to the jurisdiction and render a dismissal of Gracia's suit for lack of jurisdiction.
Concurring Memorandum Opinion by Justice VELA.
VELA, Justice, concurring.
I concur in the majority's decision to dismiss this case for lack of jurisdiction. However, I would analyze the case in the manner it was presented and argued to the trial court below.
The District filed a plea to the jurisdiction, asserting that the District, school board and superintendent were each entitled to immunity because the District is a governmental agency and sovereign immunity protects agencies, officials, and employees. The District urged that immunity had not been waived for either a breach of contract action based on a settlement agreement or Gracia's other claims. Gracia argued that immunity was waived by the Texas Local Government Code. See TEX. LOC. GOVT.CODE ANN. §§ 271.151-.159 (Vernon 2005). He urged that the local government code's waiver of immunity applied because the settlement agreement arose from his teaching contract which was a claim for services.
Absent the State's consent to suit, a trial court has no subject matter jurisdiction *397 over claims against the State. Tex. Dep't of Transp. v. Jones, 8 S.W.3d 636, 638 (Tex.1999). A school district is a unit of government. TEX. CIV. PRAC. & REM.CODE ANN. § 101.001(3)(B) (Vernon 2005). It is also a local governmental entity. TEX. LOC. GOV'T CODE ANN. § 271.151(3)(B).
Here, the District sought dismissal claiming that it was entitled to immunity and that the local government code does not provide a waiver of immunity under this particular agreement. I believe the District correctly answered Gracia's argument. In 2005, the Legislature enacted sections 271.151 through 271.159 of the Texas Local Government Code, waiving immunity from suit for certain contract claims against most local governmental entities. With respect to claims involving independent school districts, the supreme court has said that section 11.151(a) of the Texas Education Code, which provides that the trustees of an independent school district may sue and be sued, is not a clear and unambiguous waiver of immunity. Lamesa Ind. Sch. Dist. v. Booe, 235 S.W.3d 710 (Tex.2007) (per curiam); TEX. EDUC.CODE ANN. § 11.151(a) (Vernon 2006).
Therefore, I believe the issue narrows specifically to whether the District is immune and whether that immunity has been waived pursuant to the local government code as the parties argued below. The local government code expressly waives immunity solely for the purpose of adjudicating a claim for breach of contract, provided that the contract is a "written contract stating the essential terms of the agreement for providing goods or services to the local governmental entity that is properly executed on behalf of the local governmental entity." TEX. LOC. GOV'T CODE ANN. § 271.151(2). In this case, a review of the contract in general and, specifically, the provision that Gracia claims the District breached, is clearly not a written contract for goods or services provided to the District.
I believe that a discussion of Lawson is not imperative to our analysis here because that case involved a Whistleblower claim and the government code specifically waives immunity for those claims. See Tex. A & M Univ.-Kingsville v. Lawson, 87 S.W.3d 518 (Tex.2002). Here, the only waiver asserted with respect to Gracia's breach of contract issue was pursuant to the local government code. The holding, in Lawson, is that a governmental entity may not claim immunity for breach of a settlement agreement when it settles a case for which it is not immune. Id. at 518. Here, Gracia provided no theory under which the District's immunity was waived. In Lawson, the court stated that the governmental entity should not regain waived immunity by settling a case. Id. at 522. Here, the District did not waive its immunity by entering into the settlement agreement.
Therefore, I concur in the result.
NOTES
[1]  Gracia had also asserted claims for fraud, fraudulent inducement, false arrest, and malicious prosecution. He, however, dropped those claims in his live petition. See TEX.R. CIV. P. 65.
[2]  This case is submitted on the District's brief only. By order dated November 15, 2007, this Court notified Gracia that his brief was past due and requested that he file a brief by December 17, 2007. To date, Gracia has not filed a brief.
[3]  Suits against governmental entities alleging violations of the Whistleblower Act have been explicitly authorized by the Texas Legislature. See TEX. GOV'T CODE ANN. § 554.0035 (Vernon 2004). However, a public employee must initiate action under the grievance or appeal procedures of the employing governmental entity before suing under the Whistleblower Act. Id. § 554.006.
[4]  Texas law strongly favors and encourages voluntary settlement and orderly dispute resolution. See, e.g., Schlumberger Tech. Corp. v. Swanson, 959 S.W.2d 171, 178 (Tex. 1997); Elbaor v. Smith, 845 S.W.2d 240, 250 (Tex. 1992). However, parties like Gracia, who settle claims against governmental entities while their cases are in the administrative process, cannot return to the administrative process or turn to the courts when a governmental entity allegedly breaches a settlement agreement's terms. We call on the Legislature to provide a viable means of enforcing settlement agreements that are forged during the administrative process.
