This dissertation examines how implementing READ 180 for 9th grade students affects their Lexile level and reading ability. The research focuses on two questions: what changes were noticed in the students' Lexile levels? and what program recommendations can be made moving forward? The methodology used was PDSA and improvement science. The study found that overall, students averaged 29 Lexile points growth, with boys performing better than girls. Race was also considered, with mixed degrees of success observed across the five racial categories. The research implications suggest that READ 180 can be a helpful intervention for struggling readers when they enter high school. The recommendations include continuing the intervention for all struggling 9th grade readers in the district and modifying the training for teachers implementing the intervention to be more targeted and in-depth. This research contributes to the field by providing suggestions on how to support struggling readers and improve their reading ability in high school. [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.]