The purpose of this study was to assess the effectiveness of the READ 180 literacy intervention on a public high school district. This study compared the SRI test scores of two campuses. One campus had students engage in the READ 180 literacy intervention for one hour daily and the other campus had students engage in the READ 180 literacy intervention for a total of two hours daily. In addition to the comparison of the results of both campuses, the SRI test scores of the regular education students and special education students at one campus were compared and the SRI test scores of special education students at the two campuses were compared. Assessment data were grouped by two schools and analyzed using the Statistical Package for Social Sciences (SPSS). The data suggest that students that received READ 180 instruction for two hours daily did not perform better than students that received READ 180 for one hour daily. There was substantial difference in the means, but both were negative. The means were not statistically significant. The data indicates that students in regular education that received READ 180 instruction for one hour daily compared to special education students that received READ 180 instruction for one hour daily performed better. The difference in the means were statistically significant. Lastly, the data indicates that special education students that received READ 180 for two hours daily did not perform better than students in special education that received READ 180 instruction for one hour daily. The difference in the means was not statistically significant. Recommendations for further study include looking at the expansion of literacy supports for the duration of a student's educational experience. Conducting a longer study would give more opportunity to examine data. Also, examining other literacy supports and initiatives used for reading interventions could be considered and examined to compare data results to see which have a greater impact on student literacy growth and overall 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.]