Past studies have shown positive correlations between the arts and academic achievement when the arts were integrated into the literature curriculum. Other studies have shown positive associations between the arts and other areas of the curriculum, such as mathematics and science. Considering the Theory of Change, which employs understandings in Critical Literacy, Multimodal Literacy, and Transmediation, this study employed a multi-stage cluster randomized design and conducted a series of comparison and treatment group statistical analyses among predominantly low income students in an urban school district, some of whom had participated in the Integrating Theater Arts Project (ITAP). The study assessed whether a relationship existed between the presence of a theater arts intervention and student achievement in language arts and mathematics. Results showed that students receiving intervention often outperformed their control group counterparts in both math and language arts. Furthermore, students in the theater arts program outperformed their control group counterparts in every case that showed statistical significance. These cases included math achievement among sixth grade students, both language arts and math achievement of sixth grade males, and math achievement of sixth grade Hispanics. The authors conclude that programs like ITAP and methods relative to the Theory of Change may in fact promote academic achievement among participating students. They also invite future studies to consider how achievement of other academic subjects--in this case, mathematics--may also relate to such interventions.