NWEA claimed their assessment results could accurately predict student performance in reading and mathematics on the ACT Aspire for students in Grades 7 through 10. The purpose of this study was to determine the relationship between students' scores on the NWEA MAP tests in reading and mathematics and the ACT Aspire for students in Grades 7 through 10 in Rivercrest High School, as well as determining if NWEA MAP tests accurately predicted 7th through 10th grade students' scores on the ACT Aspire for reading and mathematics. The findings revealed a significant relationship between NWEA MAP test (seventh/eighth/ninth/tenth) grade reading and math scores and ACT Aspire scores. Further, NWEA MAP test (seventh/eighth/ninth/tenth) scores significantly predicted (seventh/eighth/ninth/tenth) grade ACT Aspire reading and mathematics scores. [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.]