This chapter presents information on a study designed to examine how three schools—one rural middle/high school and two urban high schools—have implemented the RTI service delivery model. Although the students at each site go through tiers, each school uses the model a little differently in order to match its specific needs with its teaching personnel and pupil deficits. Despite the differences in operation, each school has used the RTI model to improve its students' academic success. The data presented in this chapter were gathered from online resources, such as state report cards and individual school demographic information, and interviews with educators at the case study schools. Links to the online school-related data are not provided herein for confidentiality purposes.