There has been an emphasis on educators to improve student achievement, particularly in low socioeconomic schools. The latest research encourages educators to use student data to drive instruction. The purpose of this study was to determine if using data to arrange students by academic performance improves academic achievement. A middle school in Mississippi has implemented Continuous Progress Curriculum to group students based on multiple data points. Throughout the school year, data from tests and assignments are analyzed by teachers and administrators. Based on the data, students are moved to the most appropriate performance level that will address the skills and content the student needs to improve academic achievement. The study revealed an increase in student achievement. [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://www.proquest.com/en-US/products/dissertations/individuals.shtml.]