This study examines the commercial product, Study Island, and explores the use of Study Island in schools that house grades 6-8 in the state of Tennessee. The focus is on the value-added mathematics scores of schools that use this product compared to schools that do not. Study Island is a computer-assisted instruction, web-based standards mastery program aligned to individual state standards, including that of the State of Tennessee. Thirty-two schools that used the product for at least three years in mathematics were identified and designated as the treatment group. Thirty-two schools that had never used the product were identified and designated as the control group. The mean value added gain scores for the years of 2007 – 2009 were obtained and compared for the treatment and control groups. An independent samples t-test analysis was used to determine if there were differences between the treatment and control group. Statistical significance was apparent in the sixth grade for one year of the study. The sixth grade value added gains exceeded the state growth standard for each year of the study.