The purpose of this study was to collect information that could be used to explain whether supplemental educational programs are effective in improving academic progress in middle school mathematics. In addition, data were used to assess the first time success rate on the Criterion Referenced Competency Test (CRCT) for students who participated in supplemental education programs. There were two research questions that were addressed from the work conducted in this study and two hypotheses that were tested: (1) What was the relationship between the academic progress in the subject area of mathematics for middle school students who participated in supplemental education programs and their counterparts who did not participate in supplemental education programs as measured by the CRCT? (2) What was the first time success rate on the Criterion Referenced Competency Test (CRCT) for students who participated in supplemental education programs? The hypotheses related to the research questions asked if there were significant differences between the academic progress in the subject area of mathematics and the success rates for middle school students who participated in supplemental education programs and their counterparts who did not participate in supplemental education programs as measured by the CRCT. A quasi-experimental design was developed. Analyses were performed through the use of the Analysis of Variance (ANOVA). A probability level of 0.05 was used to determine if any relationship or differences were significant. There was a significant difference between the academic progress of middle school students in the subject area of mathematics who participated in the supplemental education program and their counterparts who did not participate in the supplemental education programs as measured by the CRCT. Results, implications for the profession, recommendations for future research and conclusions were made as a result of the findings from this investigation were discussed. [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.]