Meet the Team at Mathnasium of Diamond Bar

Nick van Vliet

Nick graduated with a Bachelors Degree in Business Finance from Cal State University Northridge. He first joined the Mathnasium team in 2014 after learning about the impact that Mathnasium was making in students' lives. After working as the Center Director in Irvine for 2 years, he made the transition to help serve the Diamond Bar community and currently oversees 4 Mathnasium centers. He is committed to creating an encouraging environment where students can build confidence and conquer math while still having fun. His goal is to ensure that students have an effective, engaging, and encouraging learning experience that cultivates an intuitive understanding of math. Nick loves teaching, coaching, and encouraging students to work hard and rise up to their potential. In his spare time he enjoys playing sports, snowboarding, competing in any game known to man, bbqs, and reading.

Angela Weng

Angela just graduated from Diamond Bar High School, and plans to major in Biology later on with her career. She took AP Calculus AB in her senior year of high school. Adding on, she loves to work with kids and have experience with tutoring by volunteering over the summer in a tutoring program and looks forward to spend time with kids at Mathnasium. In her free time she enjoys traveling, going to cafes, and hanging out with friends.

Emil Pabustan

Emil is pursuing a bachelor’s degree in Computer Science at Cal Poly Pomona. He enjoys working with numbers and also minors in Accounting. In high school, Emil was a math tutor in the Math Club, helping classmates and underclassmen understand challenging mathematical concepts and solve complex problems. Additionally, he has done volunteer work as part of the Volunteer organization, helping staff at daycares and community events. As someone who enjoys helping others, Emil strives to assist Mathnasium students with their math studies and ignite their passion for the subject. Some of his hobbies include reading books, playing games, and archery

Evelyn Pan

Evelyn is currently pursuing a Bachelor’s degree in Economics at Arizona State University. She enjoys both teaching student math and math itself, due to the essential critical thinking skills that it provides and reinforces. Evelyn initially discovered her true love for math when studying the game theory surrounding traditional riichi mahjong and applying that theory to many other aspects of her life. She hopes to help the students of Mathnasium discover the wondrous things math can do, just as she has.

Kris Phan

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

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

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

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

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

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!