Richard Rusczyk is an author and mathematics educator who is well known for his contributions to the field of competitive mathematics for middle and high school students. He is one of the founders of the Art of Problem Solving (AoPS) website, which provides resources and online community support for high-performing math students. Rusczyk is also a co-author of several math textbooks and online courses that are popular with students preparing for math competitions such as the Math Olympiad, American Mathematics Competitions (AMC), and the USA Mathematical Olympiad. His work focuses on developing problem-solving skills and advanced mathematical thinking among students with a strong interest in mathematics.