Reading comprehension is a crucial aspect of reading, because by understanding a text, we essentially grasp the information contained within it. The main issue addressed in this study is the low reading comprehension skills of fifth-grade students at Nursyamsiani Private Islamic Elementary School. This study was conducted to determine students’ reading comprehension skills before and after instruction using the Cooperative Integrated Reading and Composition (CIRC) model and to measure the percentage (%) of its impact on students’ reading comprehension skills. The method used in this study was quantitative, specifically a pre-experimental design in the form of a one-group pretest-posttest design. The research process involved administering a pre-test and a post-test, where the first measurement (pre-test) was conducted to assess the students’ initial condition before the second measurement (post-test), which was administered after instruction using the Cooperative Integrated Reading and Composition (CIRC) model. The results of this study indicate a highly significant improvement in students’ reading comprehension skills. This is evident from the students’ scores before and after instruction using the Cooperative Integrated Reading and Composition (CIRC) model, where the average score prior to the CIRC model was only 68.86%. Furthermore, after instruction using the CIRC model, students’ reading comprehension skills improved, with an average score of 79.09%. Based on the above research results, it can be concluded that students’ reading comprehension skills have improved.