Final answer:
Plaintiffs challenged the Texas school finance system in the 1980s and 1990s by focusing on insufficient state funding and imbalances caused by reliance on property taxes.
Explanation:
In the 1980s and 1990s, plaintiffs were able to bring suits claiming the Texas school finance system was unconstitutional by focusing on the provision in Article 7 of the Texas Constitution. This article mandates that the Legislature of the State establish and make suitable provision for the support and maintenance of an efficient system of public free schools. By arguing that the reliance on property taxes led to imbalances due to insufficient state funding, plaintiffs were able to challenge the constitutionality of the system.
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