Earth Science is an interdisciplinary science containing countless topics merging from the fields of geology, meteorology, oceanography, astronomy, and more. In this guide, you will learn challenging earth science concepts at or even higher than the level of the USESO national open, from past USESO alumni and the best of the best student-teachers.

We have condensed tricky and hard-to-find concepts that frequently show up on the USESO exam into 18 unique handouts, spanning a total of 200+ pages. We implement a highly efficient learning model, where every handout contains multiple practice problems taken from the past few years of USESO & IESO exam archives to immediately polish one's understanding of challenging concepts taught just before. Each of our 18 handouts is free to access and can be easily explored on our handout page.

To ensure a quality educational experience, our team is comprised of highly qualified high schoolers and college students from three continents, whose extensive earth science knowledge have been recognized nationally and internationally, from Science Olympiad National medalists to the International Earth Science Olympiad (IESO) winners. Our team of experts here at USESO Guide will guide you to your success — at USESO & IESO, and beyond.