This study employed a single-case design with an AB structure to examine the effect of implementing a Response to Intervention (RTI) model on a fourth-grade elementary school student with reading difficulties. The participant in the study was Deniz, a fourth-grade elementary school student. The pretest measures revealed that Deniz was at the frustration level in both word recognition and reading comprehension skills. Consequently, an eight-week reading intervention program was designed to address and remediate Deniz's reading difficulties. Through the intervention program, Deniz's word recognition improved from the frustration level to the instructional level, and her reading comprehension progressed from the frustration level to the independent level, accompanied by a significant decrease in reading miscues.