In 1989, in which court case did the texas supreme court unanimously declare that the huge disparities between rich and poor school districts were unacceptable and ordered changes in the financing of texas's public schools?

It was the case of Edgewood v. Kirby that changes in the financing of Texas' public schools were changed by the Texan supreme court because of the disparities between the rich and poor schools at the state. In addition, the court mandate was eventually implemented and discrimination eventually lessened.