 This study investigated the effectiveness of STEM applications on fourth-grade elementary school students' problem-solving skills. The study used a convergent parallel design framework, combining quantitative and qualitative methods. The results showed that the experimental group had significantly higher PSIC scores than the control group after 10 weeks of STEM application. Qualitatively, the students reported enjoying the STEM activities and wanting them to continue in future classes. This article was offered by Razitz Engine, Tugs Kavok, Ganka Kisisi, and others.