STEM education helps students know how to apply the knowledge, understanding and skills learned from the subjects to life. To achieve that goal, teachers must change the strategy of instructional design. As a result, STEM lessons will help students think and solve problems based on rigorous and highly applicable science, making a significant contribution to the career orientation of each learner. For primary school students, STEM-oriented education will focus on helping students get acquainted, create excitement, and discover useful and interesting things in life. Seeing that human meaning, the authors researched how to design STEM teaching activities that bases on the theory of learning by doing and introduced it in the article.