Justice BENDER
delivered the Opinion of the Court.
I. Introduction
In this appeal, we review the court of appeals' decision that the plaintiff school districts lack standing to sue the state, and that plaintiff parents, who challenge the adequacy of our public school funding system under the education clause of the Colorado Constitution, presented a nonjusticiable political question. Lobato v. State, 216 P.3d 29 (Colo.App.2008). We reverse the court of appeals' holdings that the plaintiff school districts lack standing to sue the state and that the plaintiffs have alleged a nonjusticiable claim.
Plaintiffs are composed of two groups. The first group consists of parents from eight school districts across the state acting in their individual capacities and on behalf of their school age children ("plaintiff parents"). The second group consists of fourteen school districts in the San Luis Valley ("plaintiff school districts"). Plaintiffs brought suit against the State of Colorado, the Colorado State Board of Education, the Commissioner of Education, and the Governor (collectively "state defendants"), alleging constitutional deficiencies in Colorado's public school financing system. Plaintiffs claim that the system, because it is underfunded and allocates funds on an irrational and arbitrary basis, violates the education clause's mandate that the General Assembly provide a "thorough and uniform" system of public education. See Colo. Const. art. IX, § 2. Plaintiffs further claim that the local school districts have standing to challenge the adequacy of the state's public school financing system because severe underfunding and irrational disbursement of funds undermine the districts' interest in local control over educational instruction and quality. See Colo. Const. art. IX, § 15.
Without taking evidence, the trial court held that plaintiff school districts lacked standing to bring their claims, but did not address the standing of the plaintiff parents. The trial court also dismissed the plaintiffs' complaint for failure to state a claim. The [363]*363court of appeals affirmed the district court's holding that plaintiff school districts lacked standing, but held that plaintiff parents did have standing. Lobato v. State, 216 P.3d at 34-35. The court of appeals also affirmed the dismissal of plaintiff's complaint for failure to state a claim. Lobato v. State, 216 P.3d at 35-42.
The plaintiff school districts appeal their dismissal for lack of standing. Additionally, both the plaintiff parents and the plaintiff school districts appeal the holding that their claims present a nonjusticiable political question. Because this case was dismissed before either side presented evidence, our precedent requires that we accept the plaintiffs' factual allegations as true.
As a threshold matter, we examine whether the court of appeals should have addressed the school districts' standing. Because none of the parties contest that the plaintiff parents possess standing, we hold that it was unnecessary for the court of appeals to decide this issue, and reverse the court of appeals on this issue.
Next, we examine whether the plaintiffs present a justiciable claim for relief. The education clause, article IX, section 2 of the Colorado Constitution, states in relevant part that "the general assembly shall ... provide for the establishment and maintenance of a thorough and uniform system of free public schools throughout the state...." The state defendants argue that the plaintiffs raise a nonjusticiable political question in that the judiciary lacks manageable standards by which to resolve the issue. They further argue that the plaintiffs' claims are precluded by article IX, section 17 of the Colorado Constitution ("Amendment 23").
We reject both of the state defendants' arguments. We have never applied the political question doctrine to avoid deciding a constitutional question, and we decline to do so now. We interpret this court's decision in Lujan v. Colorado State Board of Education, 649 P.2d 1005 (Colo.1982), to hold that it is the responsibility of the judiciary to determine whether the state's public school finane-ing system is rationally related to the constitutional mandate that the General Assembly provide a "thorough and uniform" system of public education. Such a rational basis review satisfies the judiciary's obligation to evaluate the constitutionality of the state's public school financing system without unduly infringing on the legislature's policymak-ing authority. The court's task is not to determine "whether a better financing system could be devised," Id. at 1025, but merely to determine whether the system passes constitutional muster.
As was the case in Lwjan, this claim triggers the court's responsibility to review the state's public school funding scheme to determine whether the existing funding system is rationally related to the General Assembly's constitutional mandate to provide a "thorough and uniform" system of public education. Treating the plaintiffs' allegations as true, we hold that plaintiffs' constitutional challenges to Colorado's public school finane-ing scheme are justiciable.
Article IX, section 17 of the Colorado Constitution ("Amendment 23") does not affect our holding that the plaintiffs present a justi-ciable claim for relief. Amendment 23 pre-seribes minimum increases for state funding of education, but it was not intended to qualify, quantify, or modify the "thorough and uniform" mandate expressed in the education clause, which recognized as an appropriate subject for judicial review and interpretation. Amendment 23 neither relates to nor concerns the "thorough and uniform" mandate in the education clause and, therefore, does not affect our holding that the plaintiffs present a justiciable claim for relief.
Accordingly, the plaintiffs must be provided the opportunity to prove their allegations. To be successful, they must prove that the state's current public school financing system is not rationally related to the General Assembly's constitutional mandate to provide a "thorough and uniform" system of public education. On remand, the trial court must give substantial deference to the legislature's fiscal and policy judgments. It may appropriately rely on the legislature's own pronouncements concerning the meaning of a "thorough and uniform" system of education. If the trial court finds the current system of public finance irrational and thus unconstitu[364]*364tional, then that court must permit the legislature a reasonable period of time to change the funding system so as to bring the system in compliance with the Colorado Constitution.
Hence, we reverse the judgment of the court of appeals We remand this case to the court of appeals to be returned to the trial court for proceedings consistent with this opinion.
II. Plaintiffs' Complaint and Proceedings Below
A. Plaintiffs' Complaint
Plaintiffs allege that Colorado's school financing system is underfunded and distributes funds on an irrational and arbitrary basis in violation of the education clause's mandate of a "thorough and uniform" system of public education. See Colo. Const. art. IX, § 2. They allege that the finance system particularly fails to provide a constitutionally adequate education to students with disabilities and to students from lower socio-eco-nomic backgrounds, ethnic and racial minorities, and non-English speaking families. Plaintiffs further claim that, because of a lack of access to sufficient financial resources and irrational restrictions on spending, local school districts lack meaningful control over educational instruction and quality, violating the districts' interest in local control and impairing their ability to implement the education clause's mandate. See Colo. Const. art. IX, §§ 2, 15.1
To assist in defining and measuring whether the "thorough and uniform" mandate of the education clause has been met, plaintiffs cite the minimum public school content standards and performance objectives enacted by the legislature in furtherance of its constitutional obligations.2 Plaintiffs argue that the state violated the education clause by failing to provide sufficient funds to enable the school districts to satisfy both the content standards and performance objectives in the education reform legislation. As evidence, plaintiffs cite data indicating that students of color, English language learner ("ELL") students, students with disabilities, and economically disadvantaged students failed to meet certain proficiency targets set by the Consolidated State Plan, a plan adopted by the state in order to comply with the requirements of the No Child Left Behind Act of 2001, 20 U.S.C. §§ 6301-6578 (2006).
Plaintiffs detail specific complaints with the following components of the education funding system: the Public School Finance Act ("PSFA"), sections 22-54-1011 to-134, C.R.S. (2009); categorical program funding (non-PSFA funding for specific programs serving certain underserved student populations); and capital construction funding.
According to the complaint, the PSFA sets a base funding amount for school districts, or "total program funding," which is financed by a combination of state and local revenues. Local revenues are generated by a mill levy on the assessed valuation of the taxable property within the school district. The state's contribution amounts to the difference between the school district's total program funding and the district's local share, although every district is entitled to receive a minimum level of state funding. School districts may supplement total program funding by an override election authorizing an additional mill levy.
[365]*365Although plaintiffs do not allege that the state's funding of the PSFA fails to comply with statutory mandates, plaintiffs nevertheless allege that the state's current funding of the PSFA fails to meet the constitutional mandate of the education clause and that, as a result, school districts must use the override mechanism to attempt to meet the constitutional standard. Consequently, "property poor" school districts, which do not have the same capacity to generate funds through mill levies, are disproportionally deprived of the ability to meet their obligations under the education clause and education reform legislation. As further support for their inadequate funding claim, plaintiffs cite a statewide study conducted by the Colorado School Finance Project indicating that, in the 2001-02 school year, none of Colorado's 176 districts was able to raise and expend general operating funds at a level sufficient to meet the mandates of the education reform legislation, and that Colorado public schools were underfunded by at least $500 million. Plaintiffs assert that Colorado commits relatively little to education in comparison to other states. In 2004, Colorado ranked 49th out of the fifty states in primary and secondary education expenditures per $1,000 of personal income.3
Plaintiffs also claim that the PSFA total program funding level is arbitrary and irrational. They allege that the base amount and statutory increases, as set by the 1994 amendment to the PSFA, were determined on the basis of "historical spending levels and political compromise ... and not upon a valid determination of the actual costs to provide every student with an opportunity for a constitutionally adequate, quality education, or to an education that meets the standards and goals mandated by education reform litigation and the Consolidated State Plan." 4 As further support for this claim, they allege that the state has not yet undertaken cost studies to determine the amount of resources that would be necessary to meet the "thorough and uniform" mandate or the standards set forth in the educational reform legislation and regulations.
In addition, plaintiffs allege that supplemental funding above the PSFA total program amount, intended to meet the needs of certain underserved and minority student populations, is insufficient and irrationally distributed. Plaintiffs claim that the state arbitrarily limits supplemental funding for eligible ELL students to a maximum of two years of funding per student,5 without any basis to believe that two years is adequate. Further, they allege that the Colorado Department of Education distributed just 10.3 percent of the maximum statutory ELL allotment in 2008-04, without any rational basis to conclude that the level of funding was sufficient.
Plaintiffs also cite a 2000 study prepared for the State Board of Education, which found that the state's financial contribution to special education services was inadequate and that the funding formula relied too heavily on local taxation as a source of revenue.[366]*3666 In addition, plaintiffs detail alleged deficiencies and irrationalities in funding for underserved populations, including students from low-income families.
Lastly, plaintiffs claim that the state fails to provide constitutionally adequate funding for capital construction, particularly harming students residing in low property wealth districts. Plaintiffs allege that the amount allocated to the capital reserve fund under the PSFA formula is significantly less than the amount of capital expenses incurred by a school district. To make up the difference, plaintiffs state that school districts must contract for bond indebtedness, which is repaid by a local tax levy on real property within the district's boundaries. According to the complaint, property taxes yield widely disparate revenues per pupil across districts, ranging from $1.1 million of assessed value per pupil in one district to $18,027 of assessed value per pupil at the Sanford School District No. 6 in the San Luis Valley. Plaintiffs allege that forty percent of Colorado's school districts do not have sufficient bonding capacity to meet their capital needs and, therefore, cannot adequately meet the educational needs of their students or effectively exercise local control over instruction.
Plaintiffs sought a declaration from the trial court that the existing system of public school finance is unconstitutional under the education clause and the local control clause. Plaintiffs also sought an injunction compelling the state defendants to establish, fund, and maintain a thorough and uniform system of free public schools throughout the state. They asked that the court retain continuing jurisdiction over the matter until the state defendants complied with their constitutional obligations.
B. The State Defendants' Response
The state defendants filed a motion to dismiss the plaintiffs' complaint pursuant to C.R.C.P. 12(b)(1) and 12(b)(5). They asserted that the plaintiff school districts, as political subdivisions of the state, lacked standing to challenge the adequacy of the education financing system on the basis of the local control clause. In addition, they argued that the plaintiffs raised a nonjusticiable political question because the adequacy of the school system and its funding mechanisms are matters committed wholly to the legislative branch, and they contend that the judiciary lacks manageable standards by which to resolve the issue. The state defendants further argued that plaintiffs' claims are precluded by Amendment 28, which the state defendants assert sets the constitutionally-minimum level of state funding required by the education clause.
C. Trial Court Order
Without taking evidence, the trial court granted the state defendants' motion to dismiss pursuant to C.R.C.P. 12(b)(5), ruling that the plaintiffs failed to state a claim upon which relief could be granted. The court determined that Amendment 28 sets the minimum standards for educational funding and that the question of whether Amendment 23 levels of funding are adequate is a nonjusticiable political question which the General Assembly has the sole authority to answer. The court also ruled that the plaintiff school districts lacked standing to challenge the constitutionality of school financing, but did not address the plaintiff parents' standing.
D. Court of Appeals' Decision
The court of appeals affirmed the trial court's ruling that the school districts lacked [367]*367standing. Lobato, 216 P.3d at 35. It also affirmed the trial court's holding that the plaintiffs' claims constituted a nonjusticiable political question. Id. at 85-41. As a preliminary matter, the court of appeals determined that Lujan, 649 P.2d 1005, a case in which this court evaluated the constitutionality of the state's public school financing system on the merits, did not establish the justiciability of the plaintiffs' claims. Lobato, 216 P.3d at 35-36. The court then applied the federal political question criteria developed in Baker v. Carr, 369 U.S. 186, 82 S.Ct. 691, 7 LEd.2d 663 (1962)7 and ultimately concluded that the plaintiffs presented non-justiciable claims. Lobato, 216 P.3d at 35-42.
Applying Baker, the court of appeals first reviewed the text of the education clause, which states in relevant part that "The general assembly shall ... provide for the establishment and maintenance of a thorough and uniform system of free public schools throughout the state...." Id. at 32 (quoting Colo. Const. art. IX, § 2). Based on this language, and citing the legislature's plenary authority over appropriations, see Colo. Const. art. V, § 32, the court of appeals concluded that the Colorado Constitution commits the issue of educational adequacy and financing solely to the legislature. Lobato, 216 P.3d at 37.
The court of appeals also reasoned that there were no judicially manageable standards to assess the constitutionality of the public school finance system. It asserted that judicial attempts to evaluate educational adequacy and financing would require excessive intrusion into questions of social policy and appropriations, both being questions constitutionally reserved for the legislature. Id. at 37-40.
Because the court found the plaintiffs' claims to be nonjusticiable under Baker, the court did not decide whether the claims were also precluded by Amendment 28. Lobato, 216 P.3d at 35.
The plaintiffs now seek review of the court of appeals' judgment on school district standing and justiciability.8
III. Standard of Review
A motion to dismiss pursuant to C.R.C.P. 12(b)(5) tests the sufficiency of the complaint. Pub. Serv. Co. of Colo. v. Van Wyk, 27 P.3d 377, 385 (Colo.2001). A review ing court must accept all averments of material fact as true and view the allegations in the light most favorable to the plaintiff. Id. at 385-86. The court cannot grant a motion to dismiss for failure to state a claim unless it appears beyond doubt that no set of facts can prove that the plaintiff is entitled to relief. Id.; Dunlap v. Colo. Springs Cablevision, Inc., 829 P.2d 1286, 1291 (Colo.1992). Thus, at this stage we accept as true the plaintiffs' factual allegations.
IV. School District Standing
We do not address the constitutional question of whether the school districts have standing. The court of appeals held sua sponte that the plaintiff parents possess standing, and neither the plaintiffs nor the defendants contest that holding on appeal. [368]*368Standing represents a challenge to the court's subject matter jurisdiction. Because we have subject matter jurisdiction due to the standing of the plaintiff parents, it is not necessary to address the standing of parties bringing the same claims as parties with standing. See Mesa County Bd. of County Comm'rs v. State, 208 P.3d 519, 526 n. 6 (Colo.2009). The plaintiff school districts raise the same claims as the individual plaintiff parents. The continued participation of the school districts in this case is similar to the role of permissive intervenors and does not require standing independent of plaintiffs with standing. See N. Poudre Irr. Co. v. Hinderlider, 112 Colo. 467, 475-76, 150 P.2d 304, 308-309 (1944) (quoting SHC v. U.S. Realty & Imp. Co., 310 U.S. 484, 459, 60 S.Ct. 1044, 84 L.Ed. 1293 (1940)). Therefore, the court need not evaluate the plaintiff school districts' standing provided that they raise claims identical to those of the plaintiff parents.9 See Crawford v. McLaughlin, 172 Colo. 366, 370-71, 478 P.2d 725, 728 (1970); In re Title, Ballot Title, Submission Clause, & Summary for 1999-2000 No. 215, 3 P.3d 11, 14-15 (Colo.2000). Thus, the school districts may continue as plaintiffs in this case, and we reverse the judgment of the court of appeals on this issue.
V. Justiciability
Next, we address the court of appeals' holding that claims regarding educational quality and adequacy of the state's public school financing system brought pursuant to the education clause, article IX, section 2 of the Colorado Constitution, present nonjusticiable political questions. We reverse the court of appeals and conclude that the issue is justiciable.
As a preliminary matter, we note that when Colorado became a state, public education was an important and prominent concern. The 1875 Enabling Act, which granted Colorado statehood, required as a precondition of admission to the Union that land be set aside "for the support of common schools." See 1875 Enabling Act, §§ 7, 14. The education clause, as it is worded today, has been part of the Colorado Constitution since statehood,10 and states in relevant part: "The general assembly shall ... provide for the establishment and maintenance of a thorough and uniform system of free public schools throughout the state, wherein all residents of the state, between the ages of six and twenty-one years, may be educated gratuitously." Colo. Const. art. IX, § 2.
The political question doctrine establishes that certain constitutional provisions may be interpreted and enforced only through the political process. Erwin Cheme-rinsky, Interpreting the Constitution 99-105 (1987). In Colorado, we have recognized that "[the judiciary's avoidance of deciding political questions finds its roots in the Colorado Constitution's provisions separating the powers of state government." Colo. Common Cause v. Bledsoe, 810 P.2d 201, 205 (Colo.1991) (citing Colo. Const. art. III). Because the court of appeals relied heavily on the federal political question doctrine as enunciated in Baker v. Carr, 369 U.S. 186, 82 S.Ct. 691, 7 LEd.2d 663, we examine the Baker factors, the critique of Baker when applied to affirmative state constitutional rights such as the education clause, and the manner in which we have discussed Baker in our earlier precedent. This review, when combined with our analysis of convinces us that the Baker test does not apply to this case. As we explain, we interpret Lujan v. Colorado State Board of Education, 649 P.2d 1005 (Colo.1982), as recognizing the authority of the judiciary to review whether the current funding system is constitutional.
We note that this court has cited or applied the Baker justiciability analysis only in rare cireumstances. This court has never invoked this test to preclude judicial review of a statute's constitutionality. Seq eg., Busse v. City of Golden, 78 P.3d 660, 664 [369]*369(Colo.2003) (holding that an issue involving a city's discretion to spend bond proceeds was justiciable); Meyer v. Lamm, 846 P.2d 862, 872-78 (Colo.1993) (holding that challenge by write-in candidate to voting recount procedures presented a justiciable question); Colo. Common Cause, 810 P.2d at 201 (holding that whether the speech-and-debate clause granted legislators absolute immunity from certain suits was a justiciable question).
The federal political question doctrine, as articulated in Baker, has been subject to debate and criticism by leading scholars.11 A major critique of the political question doctrine is that the Baker criteria "seem useless in identifying what constitutes a political question." Erwin Chemerinsky, Federal Jurisdiction 149 (5th ed.2007). "[There is no place in the Constitution," Professor Cheme-rinsky observes, "where the text states that the legislature or executive should decide whether a particular action constitutes a constitutional violation. The Constitution does not mention judicial review, much less limit it by creating 'textually demonstrable commitments' to other branches of government." Id. at 150. Moreover, the "most important constitutional provisions," including ones that courts have never hesitated to interpret, "are written in broad, open-textured language and certainly do not include "judicially discoverable and manageable standards'" Id.; see also Richard H. Fallon, Jr., Judicially Manageable Standards and Constitutional Meaning, 119 Harv. L.Rev. 1274, 1275 (2006) (arguing that the Supreme Court's determination of what constitutes a judicially manageable standard is "so discretionary that if the requirement of judicial manageability was applied to the Court's own deci-sionmaking process ..., the criteria by which the Court identifies judicially unmanageable standards might themselves be disqualified as judicially unmanageable"); Martin Redish, Judicial Review and the Political Question, 79 Nw. U.L.Rev. 1081, 1045 (1985) (asserting that if "we were really to take seriously the 'absence-of-standards' rationale, then ... a substantial portion of all constitutional review is susceptible to the same critique").12
Scholars examining Baker also caution against mechanically applying the federal political question doctrine to state cases. Justice Brennan, who authored Baker, declared that "state courts that rest their decisions wholly or even partly on state law need not apply federal principles of standing and justi-clability that deny litigants access to the courts." William J. Brennan, State Constitutions and the Protections of Individual Rights, 90 Harvy. L.Rev. 489, 490-92 (1977); see also Helen Hershkoff, State Courts and the "Passive Virtues": Rethinking the Judicial Fumetion, 114 Harvy. LRev. 1834, 1940 ("ISltate courts, because of their differing [370]*370institutional and normative position, should not conform their rules of access to those that have developed under Article III. Instead, state systems should take an independent and pragmatic approach to judicial authority in order to facilitate and support their integral and vibrant role in state governance."). The Supreme Court of Wyoming has expressly refused to apply the Baker factors in determining the justiciability of an educational adequacy case, relying instead on state constitutional principles and case law. See State v. Campbell County Sch. Dist., 32 P.3d 325, 334-37 (Wyo.2001).13
Important differences exist between federal and state constitutional law on judicial power and the separation of powers. The federal courts are courts of limited jurisdiction. Lujan, 649 P.2d at 1017. The United States Constitution Hmits federal jurisdiction to "cases and controversies," see art. III, § 1, and federal district courts "possess jurisdiction only as conferred by Congress." Richard H. Fallon, Jr., Of Justiciability, Remedies, and Public Law Litigation: Notes on the Jurisprudence of Lyons, 59 NY.U. L.Rev. 1, 58 (1984).
In contrast to federal courts, Colorado district courts are courts of general jurisdiction. Colo. Const. art. VI, § 9. As we stated in Lujan, the Colorado Constitution is not one of limited powers where the state's authority is restricted to the four corners of the doeument. Id. at 1017. Colorado courts are common law courts and, as such, possess jurisdiction to construe the common law unless the General Assembly acts to the contrary. § 24-211, C.R.S. (2009). The common law of England, as it existed March 24, 1607, was adopted as the law of Colorado unless repealed or abrogated by the General Assembly. See, People ex rel. Attorney Gen. v. News-Times Publ'g Co., 35 Colo. 2583, 358-59, 84 P. 912, 945 (1906); Vogts v. Guerrette, 142 Colo. 527, 533, 351 P.2d 851, 855 (1960).
As such, Colorado courts have broader jurisdiction than their federal counterparts. See, e.g., Hershkoff, supra, at 1888. In Colorado and several other states, courts may render advisory opinions on questions submitted by the legislature or executive. Note, Advisory Opimions on the Constitutionality of Statutes, 69 Harvy. L.Rev. 1302, 1302-08 (1956); Colo. Const. art. VI, § 8. State courts also have a more accepted and established role in promulgating common law than federal courts. See, eg., Hershkoff, supro at 1888-89; W. Hedges Robinson, Jr., "The Growth of the Judicial System in Colorado," in 2 Colorado and Its People: A Narrative and Topical History of the Centenmial State 3869, 382-83 (Leroy R. Hafen, ed., 1948) (recognizing the significant influence of Colorado state courts in the development of water law).
Rights enumerated in the United States Constitution have often been described as negative rights, recognizing only what areas the government cannot infringe upon. Seq, e.g., DeShamey v. Winnebago County Dep't of Soc. Servs., 489 U.S. 189, 196, 109 S.Ct. 998, 103 LEd.2d 249 (1989) (stating that the Due Process Clause "is phrased as a limitation on the State's power to act, not as a guarantee of certain minimal levels of safety and security"); Jackson v. City of Joliet, 715 F.2d 1200, 1203 (7th Cir.1983) ("[The Constitution is a charter of negative rather than positive liberties. The men who wrote the Bill of Rights [371]*371were not concerned that the government might do too little for the people but that it might do too much to them." (internal citations omitted)). By contrast, many state constitutions contain the textual basis for affirmative rights, ie., entitlements that the government must secure for its citizens. See Burt Neuborne, State Constitutions and the Evolution of Positive Rights, 20 Rutgers L.J. 881, 898-95 (1989) (listing examples of state constitutional provisions dealing explicitly with poverty, education, housing, shelter, and nutrition); William E. Thro, The Role of Language in State Education Clauses in School Finance Litigation, T9 Educ. L. Rep. 19, 19 (1998) (surveying state constitutional provisions and noting that every state's constitution, except for Mississippi's, expressly requires that some form of a free public education system be maintained). Because the negative rights guaranteed under the Federal Constitution differ from certain affirmative guarantees of state constitutions, state courts "engage ... in substantive areas that have historically been outside the Article III domain." Hershkoff, supra, at 1888-89.
Keeping in mind the debate surrounding Baker and its applicability to state claims involving affirmative constitutional rights, we now consider the approach taken in Lyjan, which recognized the authority of the judiciary to review whether the state's public school financing system that existed then was constitutional.
The Lyjan plaintiffs, like the plaintiffs here, sought a ruling that Colorado's public sehool financing system was unconstitutional, but on educational equality grounds, as opposed to adequacy grounds.14 Lujan, 649 P.2d at 1018. At the time of Lyjan, the state's public school financing system relied on local tax revenues, but had, as it does now, an equalization program by which local revenues of poorer property districts were supplemented to some extent by state subsidies. Id. at 1012-13. The Lwjan plaintiffs alleged that the system, because it was based in part on local revenues and resulted in spending disparities across the school districts, violated the equal protection clauses of the United States and Colorado Constitutions, as well as the education clause requirement that the state provide a "thorough and uniform" system of public schools. Lan, 649 P.2d at 1010. In a plurality decision, the Lujan court rejected the plaintiffs' claims, finding that absolute equality in per-pupil expenditures was not required under either the Federal or State Constitutions. Id. at 1024, 1025. Nonetheless, the court stated that Colorado has "historically sought equality between the school districts, making a concerted effort to avoid any disparate impact upon the poor." Id. at 1021.
Central to Lwjan's holding was its interpretation that the education clause contains a substantive mandate to the state subject to review by the courts. Id. The Lan court found that the clause is "satisfied if thorough and uniform educational opportunities are available through state action in each school district" and "each school district must be given the control necessary to implement this mandate at the local level." Id.; see also id. at 1027 ("Stated simply, Art. IX, see. 2 is a mandate to the State through the legislature to establish a complete and uniform system of public education for Colorado elementary and secondary school students.") (Erickson, J., specially concurring).15 Although the Lu-jan court did not address the justiciability of the plaintiffs' claims explicitly, the court did state that the function of the judiciary is to "determine what the law is" and "rule on the constitutionality" of the state's public school financing system. Id. at 1025. Such a view [372]*372is consistent with our cases similarly holding that it is the province and duty of the judiciary to interpret the Colorado Constitution and say what the law is. Colo. Gen. Assembly v. Lamm, 704 P.2d 1371, 1378 (Colo.1985); Bledsoe, 810 P.2d at 206.
Because the Lwjan plaintiffs challenged the system on equality grounds, not adequacy grounds, the court only briefly discussed what minimum level of educational opportunities would be necessary to meet the "thorough and uniform" standard. The court referenced a West Virginia case, Pauley v. Kelly, 162 W.Va. 672, 255 S.E.2d 859 (1979), which surveyed other states' interpretation of educational clauses "similar or identical to Colorado's 'thorough and uniform' requirement." Lujan, 649 P.2d at 1025 n. 23.16 In addition, the court cited education statutes, most of which are still in effect in amended version today, passed by the General Assembly to "particularly implement" the mandate contained in the education clause. See id. at 1025; see also id. at 1018-19 (noting that is the constitutional responsibility of the legislature to "establish guidelines for a thorough and uniform system of public schools").
Lujan thus concluded that the General Assembly's own laws and pronouncements, as well as other courts' interpretations of similar state education clauses, can assist the court in assessing whether the General Assembly has adequately implemented the "thorough and uniform" mandate of the education clause.17 In so doing, the court affirmed that the Colorado Constitution does not give the legislature unfettered discretion in this area and that the court has the responsibility to review whether the actions of the legislature are consistent with its obligation to provide a thorough and uniform public sehool system.
Despite Lyjan's explicit pronouncement that the court's "function is to rule on the constitutionality of our state's system" of public education, 649 P.2d at 1025, the court of appeals concluded that such serutiny of the state's public school financing system would be inconsistent with the separation of powers doctrine. The court of appeals was obligated to follow Lyjan, which it failed to do. Hence, we reverse that court's holding on this point.
Article III of the Colorado Constitution equally divides the powers of government between the executive, legislative, and judicial branches. See Pena v. Dist. Court of Second Judicial Dist., 681 P.2d 953, 956 (Colo.1984). The three branches "shall cooperate with and complement, and at the same time act as checks and balances against one another but shall not interfere with or encroach on the authority or within the province of the other." Smith v. Miller, 153 Colo. 385, 40-41, 384 P.2d 738, 741 (1968) (emphasis added). A ruling that the plaintiffs' claims are nonjusticiable would give the legislative branch unchecked power, potentially allowing it to ignore its constitutional responsibility to fashion and to fund a "thorough and uniform" system of public education.
The court of appeals asserted that to decide the plaintiffs' case on the merits would "present a substantial risk of judicial intrusion" into the General Assembly's power of appropriations. Lobato, 216 P.3d at 40. While we acknowledge that the General As[373]*373sembly "enjoys broad legislative responsibility ... to raise and spend funds for government purposes.... [This general authority must be exercised in conformity with express or implied restraints imposed thereon by specific constitutional provisions." Dempsey v. Romer, 825 P.2d 44, 51 (Colo.1992); see also Colo. Ass'n of Pub. Employees v. Lamm, 677 P.2d 1350, 1358 (Colo.1984); People v. Y.D.M., 197 Colo. 403, 593 P.2d 1356 (1979). To this end, we have regularly adjudicated claims that the legislature's appropriations power is being exercised outside of constitutional limits. See, eg., Barber v. Ritter, 196 P.3d 238 (Colo.2008) (deciding, on the merits, whether the legislature's transfer of money from special cash funds to the General Fund violated article X, section 20 of the Colorado Constitution).18
As discussed, Lyjan explicitly recognized that the legislature is constitutionally mandated to implement a "thorough and uniform" system of public education. 649 P.2d at 1025. This mandate imposes a judicial constraint, or check, on the legislature's general appropriations power, giving the court the authority to review the merits of the plaintiffs' claims.
The scope of the court's review in this area, however, is limited. As Lyjan explains, "whether a better financing system could be devised [by the legislature] is not material . as our sole function is to rule on the constitutionality of our state's system." 649 P.2d at 1025.19 In its analysis of the plaintiffs claims under Colorado's equal protection clause, the Lyjan court specifically warned against excessive judicial involvement in education policy:
While our representative form of government and democratic society may benefit ... from a public school system in which each school district spends the exact [same] dollar amount per student with an eye toward providing identical education for all, these are considerations and goals which properly lie within the legislative domain. Judicial intrusion to weigh such considerations and achieve such goals must be avoided.
Id. at 1018. While the Lyjan court went on to decide the plaintiffs' claims on the merits, it applied the minimally-intrusive standard of rational basis review to the plaintiffs' equal protection claims, inquiring into whether the state's public school financing system rationally furthered a legitimate state purpose. Id. at 1022.
Applying this standard of review, the Lu-jan court found that a legitimate state purpose of the state's public school financing system was local control over educational instruction and that this purpose was rationally furthered by the use of local taxes. Id. at 1022-28. This system gave school districts the freedom to devote more money to education than the state-guaranteed minimum amount of funding. Id. The court ree-ognized that, as a consequence of the system, the lower property wealth districts had less fiscal control than the wealthier ones. That result, by itself, was not enough to render the funding scheme unconstitutionally discriminatory under the equal protection clause, as there was no requirement that the [374]*374scheme effectuate the state's goals perfectly. Id.
The Lyjan court also applied rational basis scrutiny to evaluate the constitutionality of statutory provisions limiting a locality's ability to raise funds for educational purposes. These provisions, similar to the capital construction limits at issue in this case, tied the outer limit on the amount of money a municipality could raise to the taxable valuation of property within each school district. The court concluded that the provisions were rationally related to the legitimate state purpose of controlling the public debt and were constitutional. Id. at 1023-24.
When it reviewed the rationality of the state's public school financing system, taking into account the state's goals of local control and minimizing the public debt, the Lyjaon plurality satisfied its constitutional obligation to "determine what the law is," without usurping the legislature's authority over education policy.20 Id. at 1025.
Hence, we hold that the judiciary must similarly evaluate whether the current state's public school financing system is funded and allocated in a manner rationally related to the constitutional mandate that the General Assembly provide a "thorough and uniform" public school system. This rational basis review satisfies the judiciary's obligation to evaluate the constitutionality of the public school system without unduly infringing on the legislature's policymaking authority. The court's task is not to determine "whether a better financing system could be devised," Lyjan, 649 P.2d at 1025, but rather to determine whether the system passes constitutional muster.
The Lyjan court engaged in rational basis review of whether the state's system, which provided for revenue differences between the districts, violated the "thorough and uniform" mandate. See id. at 1024-26. We see no reason to devise a different standard of review in this case, where the plaintiffs also assert substantive claims under the same constitutional provision. Here, plaintiffs allege that the PSFA base funding amount and statutory increases are based on "historical compromise," as opposed to a rational determination of the amount it would cost to implement the "thorough and uniform" mandate or the cost of providing an education that meets the standards and goals mandated by education reform efforts. Citing an independent cost study, plaintiffs allege that the current funding levels do not allow students the opportunity to meet the standards and objectives established in education reform legislation. In addition, plaintiffs allege that funding for underserved student populations and capital construction is insufficient and irrationally dependent on local property taxes. Plaintiffs further allege that the state's public school financing system is unconstitutionally irrational because it prevents the district from implementing the education clause mandate at a local level.
In sum, plaintiffs allege that the state's public school financing system is unconstitutional because it is underfunded and disburses funds on an irrational and arbitrary basis in violation of the "thorough and uniform" mandate. In an appropriate case, as was the case in Lyjan, our courts have the responsibility to review the state's public school funding scheme to determine whether this system is rationally related to the General Assembly's constitutional mandate to provide a "thorough and uniform" system of public education. Hence, plaintiffs' constitutional challenges to Colorado's public financing scheme present appropriate claims and are justiciable.
The plaintiffs are entitled to the opportunity to prove their allegations. To be successful, they must demonstrate that the school finance scheme is not rationally related to the constitutional mandate of a "thorough and uniform" system of public education. The trial court must give significant [375]*375deference to the legislature's fiscal and policy judgments. The trial court may appropriately rely on the legislature's own pronouncements to develop the meaning of a "thorough and uniform" system of education. If the court finds that the current system of public finance is irrational, then the court must provide the legislature with an appropriate period of time to change the funding system so as to bring the system in compliance with the Colorado Constitution.21 Evans, 482 P.2d at 972.
VI. Amendment 23
The state defendants assert that Amendment 28, put in context, sets the constitutionally minimum level of state funding required by the education clause, and therefore, the plaintiffs do not present a justiciable question. The trial court agreed, finding that Amendment 28 "clearly mandates a minimum level of state education funding," and that the levels dictated by Amendment 28 are "consistent with the goals of the education clause." It ruled that the question of whether Amendment 28 levels of funding are adequate is a political question to be decided by the legislature and the voters. We disagree with this interpretation of Amendment 28.
When construing a constitutional amendment, the duty of the court is to "give effect to the electorate's intent in enacting the amendment." Zaner v. City of Brighton, 917 P.2d 280, 286 (Colo.1996). Words must "be given the natural and popular meaning usually understood by the people who adopted them." Urbish v. Lamm, 761 P.2d 756, 760 (Colo.1988). If the intent of the electorate is not clear from the language of an amendment, "courts should construe the amendment in light of the objective sought to be achieved and the mischief to be avoided by the amendment." Zaner, 917 P.2d at 286 (citing People in Interest of Y.D.M., 197 Colo. 403, 407, 593 P.2d 1356, 1359 (1979)). In doing so, courts may consider other relevant materials such as the "Blue Book," an analysis of ballot proposals prepared by the Legislative Council. Davidson v. Sandstrom, 83 P.3d 648, 655 (Colo.2004). Evidence of the "contemporary interpretation of those actively promoting the amendment" may also be given weight. Bedford v. Sinclair, 112 Colo. 176, 182, 147 P.2d 486, 489 (1944).
Amendment 28 was adopted by voter initiative in 2000. By its plain terms and as described in the Blue Book, Amendment 23 increases per-pupil funding and funding for categorical programs by a minimum rate of inflation plus one percentage point until the fiscal year 2010-11, and thereafter by at least the rate of inflation. Colo. Const. art. IX, § 17(1). Amendment 28 also requires that total state aid provided through the PSFA increase by at least five percent annually. Id. § 17(5). To finance the increased revenue demands, Amendment 23 requires that the state divert a portion of tax collections to a state education fund exempt from the revenue and spending limits of article X, section 20 of the Colorado Constitution. Id. § 17(4).
While the Blue Book accurately explains that Amendment 28 "sets a minimum increase in funding," 22 nowhere does it refer to [376]*376the education clause, or the terms "thorough," "uniform," or "adequate." The Blue Book summarized proponents' arguments in favor of Amendment 23 as seeking to reverse the decline of funding for education, which began after the adoption of constitutional limitations on state revenue and spending. Proponents did not suggest that the amendment would suffice to fund the minimum level of educational opportunities to all students as required by the education clause.
As we have shown, Amendment 23 pre-seribes minimum increases for state funding of education. It was not intended to qualify, quantify, or modify the "thorough and uniform" mandate expressed in the education clause, which Lyjan recognized as an appropriate subject of judicial review. Consequently, the Amendment 23 mandate relates solely to a minimum level of funding. It neither relates to nor concerns the "thorough and uniform" mandate in the education clause and, therefore, does not affect our holding that the plaintiffs present a justicia-ble claim for relief.
VII Conclusion
For the reasons stated above, the court of appeals' judgment is reversed, and we remand this case to the court of appeals to be returned to the trial court for proceedings consistent with this opinion.
Justice RICE dissents, and Justice COATS and Justice EID join in the dissent.