Biology is a multifaceted scientific field encompassing a vast array of subjects, including genetics, physiology, ecology, microbiology, and more. In this guide, you will delve into complex biological concepts at the level of the USABO national competition and beyond, taught by past USABO alumni and the best of the best student-teachers.

We have condensed tricky and hard-to-find concepts that frequently show up on the USABO open into 21 unique handouts, spanning a total of 400+ pages. We implement a highly efficient learning model, where every handout contains multiple practice problems taken from the past few years of USABO & IBO exam archives to immediately polish one's understanding of challenging concepts taught just before. Each of our 21 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 around the country, whose extensive biology knowledge have been recognized nationally, from Science Olympiad National medalists to Top 50 finalists of the USABO. Our team here at USABO Guide will guide you to your success — at USABO & IBO, and beyond.