Our staff is built to teach each student individually, to develop the skills they need to thrive in mathematics, and to foster a love of learning.

Ray Yeung

Center Director

Ray is a Registered Professional Mechanical Engineer in California with more than 18 years of experience in engineering consulting. He has worked across a range of disciplines, including mechanical, structural, electrical, and software validation, in both nuclear and pharmaceutical industries. 

He earned his B.S. from the University of Wisconsin–Madison and his M.S. from the University of California, Davis, both in Mechanical Engineering. Outside of Mathnasium, Ray volunteers as a certified coach with Catholic Youth Organization sports teams and enjoys mentoring students both academically and athletically. 

Kobe Wijesekerea

Assistant Center Director

Kobe earned his B.A. in Pure Mathematics from San Francisco State University and is currently pursuing his master’s degree in the same field. He hopes to eventually earn a Ph.D. and contribute to the world of math research. 

Kobe is passionate about helping students discover the elegance and logic of mathematics. His calm, thoughtful approach helps students feel comfortable exploring challenging concepts. When not teaching, Kobe enjoys video games and music. 

Helen Feng

Instructor

Helen is a recent graduate of Abraham Lincoln High School, class of 2023. She joined Mathnasium as an instructor to share her passion for math and help younger students develop a positive relationship with the subject. 

In her free time, Helen enjoys singing and dancing. Her enthusiasm and cheerful energy bring a fun and supportive spirit to the center. 

Simon Bordoli

Instructor

Simon is a high school sophomore at the Urban School of San Francisco. He serves as president of the school’s investment club and tutors peers in Mandarin. He also competes on the varsity soccer and tennis teams. 

Simon enjoys building Lego sets, reading science fiction, and watching soccer. He values the importance of understanding why math works, not just getting the right answer, and enjoys helping students develop that same mindset. 

Madison Lok

Instructor

Madison is a senior at the Nueva Upper School in San Mateo. She enjoys the logical order of math and hopes to help children better understand this process. Outside of academics, she enjoys doing and experiencing arts.

Our Mathnasium Mission

Teach children math so they understand it, master it, and love it. Math can change their lives, and they can change the world.

Quote Quote
What I love about Mathnasium is the ability to teach problem-solving skills and make math make sense, while also making a student smile.
Amber W., Mathnasium Instructor

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Student using math cubes to solve fractions
Student working with a math tutor at a local math learning center

Want to join the Mathnasium team?

Are you interested in changing lives through math? We're looking for outstanding individuals with a high level of commitment who are passionate about teaching math. Find out if there's a Mathnasium position that's just right for you!

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