The purpose of this study, through an analysis of the literature review of general scholars in the field of school poverty, equity, efficiency, and student achievement results, was to determine whether economic disparity had a direct statistical significance to student achievement gaps. Specifically, identification of the five socioeconomic tiers using the economic blocks, as defined by the Texas Education Agency, and their corresponding STAAR student achievement results were examined in a border city urban school setting were used to determine if educational achievement disparity existed and whether there was a statistical significance in performance to the identified socioeconomic tiers. Through an analysis of student achievement data of an urban school district, the study established null hypothesis and examined the difference in student achievement between the subsequent five economic tiers, as defined by the Texas Education Agency. Specifically, the study examined if there were differences in student achievement outcomes from each of the five socioeconomic tiers and the statistical significance between the socioeconomic tiers. Furthermore, a deeper analysis was sought to determine the most significant impact in learning loss was determined between economic tiers. The analysis sought to validate the State Compensatory Education funding model in a single district as established under House Bill 3. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]