Math Grade 5 not only helps students master basic knowledge but also develops thinking skills, problem solving and applying mathematics into practice. This prepares students with a solid foundation for progression to higher education and everyday life. This is also a golden time to deploy STEM education. However, in current educational institutions, the implementation of STEM education is still not focused, and teachers are still confused when designing STEM educational activities, especially designing educational activities STEM in Math Grade 5. With the research results, we hope to be able to contribute to providing teachers with necessary reference materials in teaching 5th-grade Math in the STEM education orientation.