Ali Cy


Ali is a high school senior at Phillips Academy Andover. She was an Honorable Mention for the 2020 USAJMO, and was on the 2020 USA European Girls' Math Olympiad team, at which she got a silver medal. She started doing math contests seriously in seventh grade. While participating in math contests, she saw the way in which girls were isolated in math and how that helped lead to the under-representation of girls at contests. She founded Athemath in order to help math girls connect to each other. Other than math, she enjoys playing the piano and programming.

Andrew Wu

Vice President

Andrew Wu is a rising junior at Yale University, living in the DC metropolitan area. He works as the head problem editor for the Yale-run competitions MMATHS and Girls in Math. In high school he qualified for USA(J)MO thrice, and published two papers in Euclidean geometry. Outside of math, Andrew loves playing piano — classical, pop, musical theatre, anything — and he’s passionate about educational equity, good writing, and graphic design.

Evan Chen


Evan Chen (v_Enhance) is a math PhD student at MIT. He is one of the coaches of the USA IMO team, serving as a coordinator for the team selection tests and the assistant academic director at MOP. He is an editor-in-chief for the USA(J)MO editorial board and the author of the textbook Euclidean Geometry in Mathematical Olympiads. As a high school student, Evan was an IMO gold medalist and winner of the 2014 USAMO (which he took from 12:30am to 5am in Taiwan). Outside of math and teaching, Evan enjoys playing competitive Hanabi and entertaining students on Twitch.

Janabel Xia


Janabel Xia is currently a first-year student at MIT living near the Boston area. She served as her high school’s math team captain from 2018-2020, helping to write and direct the Lexington Math Tournament for the past few years. Janabel has been active in various math competitions; she attended MOP twice (2018, 2019) and was on the USA European Girls’ Math Olympiad team and an individual silver medalist (2019). She has seen first-hand and second-hand the experiences that discourage young girls to continue pursuing math, and hopes to provide support for these girls through Athemath. Outside of math, she also enjoys dancing, making music with others, drawing, crosswords, and late-night snacks.

Serena An

Math Director

Serena is currently taking a gap year to study abroad in South Korea. In high school, she was a two-time MOP qualifier and EGMO gold medalist. She also founded the Brookings Math Circle five years ago to address the lack of math interest and resources in her town. In her free time, she enjoys playing card games, learning languages, and watching movies.


Isabella Quan


Isabella Quan is a high school senior at Westlake High School in Austin, TX. She has competed in math contests since 4th grade and attended MOP in 2020 and RSI in 2021. When competing in team contests, she was often the only girl among several boys, and hopes to encourage and inspire girls who are starting off in math. When not working, she enjoys playing Pokemon, writing, and listening to music, especially K-pop.

Isabella is teaching the class My Favorite Things in our Fall 2021 session.

Kaylee Ji


Kaylee Ji is a high school junior at Lexington High School in Lexington, MA. Kaylee is a two-time USAJMO honorable mention and MOP participant. She was on the Canada European Girls' Math Olympiad Team and won a gold medal. Kaylee has seen girls discouraged from preparing for harder competitions and wishes to assist other girls in their math goals. In her free time, she enjoys reading, drawing, and taking walks outside.

Kaylee is teaching in our Spring 2022 session.

Michelle Kang


Michelle Kang is a high school sophomore at Thomas Jefferson High School for Science and Technology in Virginia. She attended MOP in 2021 and has competed in math contests from a young age. She hopes to inspire and motivate other girls who have a passion in STEM. Outside of math, she loves reading (especially dystopian and fantasy), playing card games and social deduction games, and playing table tennis.

Michelle is teaching the class Counting Strategies in our Fall 2021 session.

Nicole Shen


Nicole is a high school junior at Piedmont Hills High School in California. She has competed in various math competitions throughout middle and high school (so far) and attended MOP in 2021. Nicole hopes to encourage girls and nonbinary students to participate in whatever excites them, whether it be math, other STEM paths, or anything else! Outside of math, she enjoys learning languages, listening to music, and hanging out with friends.

Nicole is teaching the class Algebra and Combinatorics Trail Mix in our Fall 2021 session.

Pravalika Putalapattu


Pravalika is a high school senior at Thomas Jefferson High School for Science and Technology. She won a gold medal at the Math Prize for Girls Olympiad in 2019 and attended MOP in 2020 and 2021. Pravalika is also a central leader of the math nonprofit inteGIRLS and a regular volunteer at Academy of Hope Adult Public Charter School, and she is highly passionate about mathematics, education, and activism. She hopes to encourage people of all backgrounds to pursue their STEM passions without fear! Outside of math, she enjoys reading sci-fi/fantasy (current read: The Weight of the Stars - K. Ancrum), painting, and listening to Rainbow Kitten Surprise.

Pravalika is teaching in our Spring 2022 session.

Sanjana Das


Sanjana is a first-year student at MIT. She attended MOP in 2019 and 2020, and was an EGMO gold medalist in 2020 and 2021. Outside of math, she enjoys reading, crosswords, and puzzles.

Sanjana is teaching the class Counting and Probability Principles in our Fall 2021 session.

Serena Xu


Serena Xu is currently an 11th grade student in North Carolina. She was a 2021 MOPper with 27 on the USAJMO. She was also an alum of Athemath’s first session. Moreover, she is really obsessed with EDM and sometimes even remixes different pieces (also 10% DJ) or cuts short videos for fun.

Serena is teaching in our Spring 2022 session.

Vivian Loh


Vivian (v4913) is currently a high school sophomore at Winchester Thurston School in Pittsburgh, PA. She has been doing math contests since 5th grade, and attended MOP in 2021. Her favorite subject of math is geo, and although she has never qualified for EGMO, she loves the book EGMO. She also enjoys biking and wasting time on AoPS and Discord.

Vivian is teaching the class Cute Geometry in our Fall 2021 session.


Holden Mui


Holden Mui is currently a freshman at MIT. He taught at a local gifted academy and also ran a local math circle. He attended MOP three times and also was a USAMO Honorable Mention. In addition to math, he also enjoys playing chamber music with friends and writing music. He thinks he is the reincarnation of Ravel but other people think he is just a turtle.

Alex Zhao


Alex is a high school sophomore at Lakeside School in Seattle, Washington. Alex is a two-time USAJMO winner and MOP participant, and also attended USA-Canada Mathcamp. On the list of things Alex enjoys doing but is terrible at are soccer, his favorite subject rigid combo, and playing the piano. Alex is a hardcore science fiction fan (Dune and Foundation, specifically the book series and the trilogy, respectively), and plays too many video games.

Ilaria Seidel


Ilaria Seidel is a senior at Commonwealth School in Boston, MA. She is a second-year research student at the MIT PRIMES program, and attended USA/Canada Mathcamp in 2019. In her free time, she enjoys playing the flute, painting octopuses, and learning languages. She is excited to TA at Athemath!

Jessica Wan


Jessica is a high school sophomore from Parkland, Florida. Since starting math competitions in elementary school, she has attended MOP in 2020 and 2021 and was a gold medalist at EGMO 2021. Problems involving functional equations are her favorite. Outside of math, she enjoys drawing, watching anime, and running.

Rey Li


Rey Li is a senior at Solon High School in Ohio who was USAJMO winner in 2020 and attended MOP in 2020 and 2021. Rey loves math and helping others with math, and hopes to share the best parts of it with others. Outside of math, Rey plays copious amounts of Slay the Spire and reads a little too much manga.

Past Staff

Janette Park


Janette is currently studying Electrical Engineering and Computer Science as an undergraduate at MIT. In middle and high school, she participated in various math competitions, including MathCounts, the AMC series, and other local and national competitions. She especially loves geometry and enjoys sharing her passion in math with younger students. Outside of math, Janette is interested in the linguistics field of study and spends her free time watching kpop and dramas.