The **U.S. Earth Science Olympiad (USESO) & IESO Team Selection**, run by the **United States Earth Science Organization (USESO)**, is a premier national **STEM program** that identifies and trains top U.S. **high school students** to compete at the International Earth Science Olympiad (IESO). Open to motivated learners in grades 9–12, this competitive pathway recognizes excellence in Earth and environmental science and is widely respected by educators, universities, and STEM professionals. Through USESO, students deepen their understanding of **science research**, **engineering**, **mathematics**, and **technology** as they apply these disciplines to real-world Earth systems—atmosphere, oceans, geosphere, and environmental change. Participants typically progress through exams, advanced training, and team-based problem solving. Along the way, they develop: - Strong analytical and quantitative skills - Experience interpreting data, maps, and models - Collaboration and communication skills through group investigations Students also gain exposure to scientists, educators, and past Olympiad competitors, creating a valuable mentoring and peer network in the Earth and environmental sciences. This program significantly strengthens **college applications** and preparation for STEM-related careers. USESO alumni can showcase rigorous academic achievement, national-level competition, and evidence of persistence in challenging coursework. The focus on complex, real-world problems helps students build transferable skills relevant to fields such as environmental science, geology, climate science, civil and environmental engineering, data science, and sustainability policy. Participation demonstrates curiosity, initiative, and the ability to thrive in advanced STEM environments. Motivated **high school students** who enjoy Earth science, are comfortable with math-based reasoning, and want to stretch beyond the classroom should strongly consider applying. Whether you’re a 9th grader just discovering geology or a rising senior preparing for STEM majors, the **USESO & IESO Team Selection** pathway offers a unique chance to learn deeply, challenge yourself, and possibly represent the United States on the international stage. Learn more and check eligibility and selection details at [useso.org](https://www.useso.org/).