Rachel Y Zhang

Director and Instructor

Rachel is a PhD student in EECS at MIT studying theoretical cryptography and error correcting codes. She was on the U.S. European Girls' Math Olympiad team in 2014-2016 and now coaches the team along with Meghal. 

Sherry Gong

Co-Director and Instructor

Sherry is an assistant professor at Texas A&M specializing in low-dimensional topology. She competed at the IMO in 2002-2004 representing Puerto Rico, and in 2005 and 2007, representing the United States. She coached the U.S. EGMO team from 2012 to 2017. 

Meghal Gupta

Co-Director and Instructor

Meghal is a PhD student in EECS at UC Berkeley studying theoretical computer science, after receiving her Bachelor's degree from MIT. She coaches the U.S. European Girls' Math Olympiad team, and competed on the team herself in 2015 and 2016.

2023 Instructors

Brynmor Chapman


Olha Silina


Olha is a PhD student at Carnegie Mellon University studying Algorithms, Combinatorics, and Optimization. She represented Ukraine at EGMO 2015- 2016 and at IMO 2016. 

Victoria Xia


Victoria Xia is former math olympian turned software engineer. In her former life she was a two-time gold medalist at each of the China Girl's Math Olympiad (2011, 2012) and the European Girl's Math Olympiad (2012, 2014). She's most likely found out in nature, on the tennis court, or curled up on the couch with a book. 

2023 Teaching Assistants

Isabella Zhu


Isabella is a rising college freshman at MIT and plans to study math and computer science. She was on the U.S. European Girls' Math Olympiad team in 2022 and 2023, receiving gold medals both times. Her favorite math subject is geometry.

Rey Li


Rey Li is a rising sophomore studying computer science and is excited to staff for G2 again! Interests include education, 3D modeling, free and open source software, and more.

Local Organizers

The 2023 G2 Math Program would not be possible without the efforts of the Mellon College of Science Office of Diversity, Equity and Inclusion, in particular the wonderful team consisting of: