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.

Judy Tom

Owner

Judy is the owner of Mathnasium of Walnut and holds a Bachelor’s Degree in Child Development along with a Professional Teaching Credential. Before opening her center, she taught as a Certified Elementary School Teacher and also worked as a National Account Sales Executive. Her experience spans teaching multiple subjects, including math, to managing client relationships on a national scale. 

Judy is passionate about helping children in Walnut and surrounding communities truly understand math in a way that makes sense to them. She loves coaching, encouraging, and inspiring students to reach their full potential through the Mathnasium Method™. 

Kat Chiu

Assistant Center Director

Kat, short for Kristin, graduated from Cal State Fullerton with a Bachelor’s Degree in Criminal Justice. She has worked as a private tutor for students of all ages and in all subjects before finding her place at Mathnasium. 

Known for her approachable nature and commitment to helping students succeed, Kat enjoys guiding learners toward a deeper understanding of concepts. Her dedication makes her a valued part of the Mathnasium of Walnut team. 

Yi-Szen Tang

Instructor


Yi, short for Yi-Szen, is a 3rd-year student attending Cal Poly Pomona with a major in Mechanical Engineering and a minor in Computer Science. He has always been passionate about intuitively understanding math and breaking down math sentences into concrete or geometric meanings. He always loves teaching and explaining the language of math to his students.

He is very excited about math and continues to strengthen his own skills. He’s currently studying a practical use of statistics and Bayesian inference called Kalman filtering, which is a common mathematical model used to estimate the true measurement of any system with lots of variance. He hopes to motivate his students to be equally excited about math!

Dana Kong

Lead Instructor

Dana graduated from UC San Diego with a Bachelor’s degree in Mathematics and Computer Science. She loves helping students overcome challenges in understanding math concepts by building on their strengths and addressing their weak points. Dana views math as an intriguing lens through which to perceive the world around us. Despite her academic background, Dana has a long-term interdisciplinary interest in pursuing a more biology-oriented career. In her free time, she engages in a variety of hobbies, including: table tennis, mycology, chess, traveling and exploring cuisines from diverse cultures, playing pool, and creating digital art.

Sacha Bedou

Instructor

Sacha is currently pursuing a Bachelor’s Degree in Chemical Engineering with a minor in Materials Engineering at Cal Poly Pomona. He has always enjoyed math and helping others understand challenging concepts, and has experience tutoring students in a variety of subjects. He enjoys making math easier to understand and helping students build confidence in their abilities.

Sacha looks forward to making a positive impact on Mathnasium students by helping them develop both their mathematical skills and confidence. In his free time, he enjoys working out, running, working on engineering projects, and spending time with friends and family.


Emilia Ramirez

Instructor

Ivan Tan

Instructor

Maddy Kim

Instructor

Dani Nguyen

Instructor

Dani graduated from UC San Diego with a Bachelor's Degree in Mathematical Biology. She had always been fascinated by math and had privately tutored other students K-12 before coming to Mathnasium. 

In her free time, she likes to make/listen to music, work on cars, and play video games.

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

Schedule Your Math Skills Assessment Today

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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