
Get to Know Us

Catherine Li
a former vice president of YEA, is currently an MIT sophomore majoring in both mathematics and computer science and engineering. Catherine was a 4x USA(J)MO qualifier with USAMO HM, 6x AIME qualifier/6x Math Prize for Girls invitee, USACO Gold contestant, 3x NACLO semifinalist, and 2x the Spirit of Ramanujan Fellow. She was a published author for her machine learning research in biotech applications with the MIT PRIMES-USA research program. She was also a talented pianist and violinist regularly performing in youth symphonies and community charity concerts. While at YEA, she led the Girls in STEAM group, organized the annual YEA math contests, hosted numerous math and programming lectures and workshops, and spearheaded the “YEA Friday STEM Chat”, a weekly experience-sharing seminar.
Youth Euclid Association (YEA), established in 2017, is a youth non-profit organization in the Tri-Valley area of ​​Northern California. Its mission is to help students locally learn and grow through the efforts of its members. YEA has a group of student teachers who are enthusiastic about public welfare and love STEM (Science, Technology, Engineering, Mathematics). They have been working passionately in the community since its establishment. They stimulate the learning potential of students who study in the organization, and at the same time help disadvantaged people and give back to the community.
Since the establishment of YEA, eight students have been invited by the U.S. National Mathematical Olympiad Team (MOP) to receive training to participate in the International Mathematical Olympiad (IMO). Excellent students help each other and learn from each other. The earliest seminar courses run by a group of MOP students have already produced two new MOP team members. YEA also actively offer STEM courses at all levels from primary school to high school to help children of all ethnic groups learn, whether they are children who want to challenge themselves, or children who encounter difficulties in learning and need help.
YEA members also attach great importance to strengthening their own development and actively participate in various prestigious high school and junior high school mathematics competitions in California and even across the United States. They have participated in the Harvard MIT Joint Mathematics Competition (HMMT), the Stanford Mathematics Competition (SMT), and In top competitions such as USMCA, Berkeley Mathematics Competition (BMT), Caltech & Harvey Mudd University Mathematics League (CHMMC), and Princeton Mathematics Competition (PUMaC), teams and individuals have achieved outstanding results and ranked among the top three.
YEA has also organized donations of materials and food for the homeless on many occasions. Many members also provide free tutoring for children from low-income families in their respective communities. While giving back to the community, it also greatly improves the members' understanding of the community, awareness and organizational coordination ability of public welfare services. For outstanding students from families with financial difficulties, YEA has established a scholarship named after Randy Lomas, a famous local mathematics teacher who has made many contributions to the community. The scholarship is 1,000 dollars per year enough to support a student to participate in YEA's full-year courses.

Nicole Shen
Nicole is a sophomore at MIT double majoring in computer science and math. Nicole was a MOP attendee, 5x AIME qualifier, 4x Math Prize for Girls invitee, USACO Gold contestant, and NACLO invitational round qualifier. She is currently doing research in geometric deep learning and quantum algorithms. As part of YEA, she has served as VP of outreach and taught classes in AMC 10/12.

Aaron Chen
Aaron is a freshman at UC Berkeley. He’s deeply grateful to YEA for the countless opportunities
it provided for his growth. Through YEA, he made lifelong friends, participated in collegiate math
competitions, and helped organize YEA contests—experiences that created many cherished
memories.