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.

Nick van Vliet

Operations Director

Nick earned his Bachelor’s Degree in Business Finance from Cal State Northridge and joined Mathnasium in 2014 after being inspired by its impact on students. He served as Center Director in Irvine for two years before taking on the role of Operations Director, now overseeing four centers including Diamond Bar. 

Nick is committed to fostering an engaging and encouraging learning environment where students can build confidence, challenge themselves, and enjoy math. Outside of Mathnasium, Nick enjoys sports, snowboarding, BBQs, reading, and competing in just about any game you can think of. 

Angela Weng

Assistant Center Director

Angela recently graduated from Diamond Bar High School, where she completed AP Calculus AB and developed a strong interest in math. She plans to pursue a degree in Biology and has always enjoyed working with students. 

Angela brings experience from tutoring programs and summer volunteer work, where she helped students build foundational math skills. She looks forward to continuing that journey at Mathnasium. When she’s not working, Angela enjoys traveling, visiting cafes, and spending quality time with friends. 

Emil Pabustan

Instructor

Emil is currently studying Computer Science at Cal Poly Pomona, where he also minors in Accounting. He has a strong interest in problem-solving and enjoys applying logical thinking to both technical and academic challenges. In high school, Emil was a peer tutor through Math Club and volunteered at local daycares and community events. 

At Mathnasium, Emil loves helping students unlock their potential in math. His goal is to support students in gaining confidence and clarity in every session. Outside of academics, Emil enjoys reading, gaming, and practicing archery. 

Evelyn Pan

Instructor

Evelyn is pursuing a Bachelor’s degree in Economics at Arizona State University and has a passion for both learning and teaching math. She appreciates the critical thinking and logic that math builds and enjoys sharing that with her students. 

Her love for math was sparked by studying game theory through traditional riichi mahjong, which she now applies to many aspects of life. Evelyn hopes to help Mathnasium students experience the same wonder and empowerment she found in mathematics. In her free time, she enjoys strategy games, exploring new ideas, and developing creative problem-solving skills. 

Kris Phan

Instructor

Kris is currently enrolled at Chino Hills High School as a senior, where he has taken Trigonometry / Pre Calculus, and is currently taking Calculus AB. He loves tutoring and teaching to help children improve their skills, especially math! Kris also has prior experience tutoring students at Wickman Elementary School in varying grade levels, which led him to find a strong passion for teaching! Kris is also currently striving to become a teacher, to get a degree in education, and hopes to influence all the kids that he tutors so that they can strive in their lives as well. In his free time, he enjoys playing video games, going out with friends, and occasionally watching anime.

Kevin Choe

Instructor

Born in Seattle, Kevin was raised in San Diego. From an early age, he had a passion for the clarity and beauty of math. In high school, he studied past Calc BC and started college level math; as well as enjoying competitive math such as the American Math Competition(s) (AMC) and the American Invitational Math Exam (AIME). In 2015, he decided to attend UCLA for Computer Science and Engineering, when he encountered the grace of the Lord Jesus Christ and entrusted his life to his Savior. After two (2) leaves of absence -- including several years spent in Korea -- he recognized that he ought to pursue different opportunities to glorify his God. Kevin joined Mathnasium in the fall of 2023; and outside of operating hours he enjoys running, fellowshipping with friends, and spending time with his mother.

Carly Knoles

Instructor

Carly is currently pursuing a bachelor’s degree in Applied Math at Cal Poly Pomona. She previously worked as a tutor her senior year of high school, where she discovered her love for teaching and helping others, especially with math! She enjoys its propensity for problem-solving and hopes that she can help students realize their love for math, just as she has. Carly graduated as salutatorian from her high school and is now the team captain of one of CPP’s esports teams. She enjoys playing video games, writing, and eating good food with friends.

Ethan Amado

Instructor

Ethan is currently pursuing a bachelor’s degree in Mechanical Engineering at Cal Poly Pomona. He also minors in mathematics and finds solving math-related problems to be fun. At Mathnasium, Ethan strives to help students discover the joy and excitement he experiences when solving math problems while deepening their understanding of mathematical concepts. In his free time, he enjoys going out to eat with friends, watching lots of movies and shows, and attending concerts.

Ryan Golonka

Instructor

Ryan is currently at Cal Poly Pomona studying for a bachelor's degree in Applied Mathematics. Ryan has always been interested in math because he found that math was everywhere in some way shape or form. Ryan knows how to solve a Rubik’s cube and also can play the double bass, just not as well anymore. Currently in college Ryan is studying for the Putnam competition in December. In his free time, Ryan likes to play video games, watch very long videos, speedrun, listening to musicals, and meeting up with friends when they have the time.

Yongchong Yu

Instructor

Yongchong has an Associate’s Degree in Programming from Mt. SAC and is pursuing a Bachelor's Degree. He has been a tutor in college for four years and really enjoys helping students. Basic math is logical training and the foundation of analysis, and everyone can master it if they put their mind to it! Yongchong was a CSU Long Beach Archery team member and archery is the sport he used to de-stress. He also builds models and airbrushes them in his spare time!

Saym Waraich

Instructor

Saym is currently at Mt. SAC working towards a bachelor's degree in Biology. He has taken both Calculus I and II in high school and is currently taking Calculus III. On top of that, he has experience working with high schoolers as he often tutored classes such as Algebra I and II. He has also interacted with students in Evergreen Elementary School, particularly 4th-5th graders. In his free time, he enjoys hanging out with his friends, playing the violin, practicing Muay Thai, and working on his car.

Karim Masir

Instructor
Karim recently graduated from diamond bar high school and currently attends Mt. SAC as a computer engineering major. Through taking both Calculus AB and BC in high school, he solidified to himself his love for mathematics, and officially decided to pursue a math-related major in college. Teaching those who struggled in a subject that he personally felt he had a deep understanding of was always something that felt rewarding and even fun to Karim, leading him to seek out various independent tutoring jobs in the past, and eventually, Mathnasium as his ideal part-time job. In his free time, Karim likes to play guitar, train martial arts like wrestling and jiu-jitsu, and spend time with his friends.

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

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