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Our Team

Our specially trained math instructors will teach your child how to understand math in an individual setting; our unique approach enables us to explain concepts really well and lend a helping hand to every student. Our tutors foster a caring, encouraging environment that helps kids thrive and learn! Read below to learn more about our talented team:

Bon Chau, Center Director 

Bon is the Center Director at Mathnasium of Glendora. Bon has been center director for more than 7 years, understanding well in Mathnasium Method and experienced in teaching the students in the way that makes sense to them. He has a Bachelor of Science degree in Mechanical Engineering from UCLA, in which it provided a solid foundation on the math skills. He has taught and tutored over hundreds of students of all ages, and he is committed to bringing the math skills to his students by using an unique combination of mental, verbal, visual, tactile and written techniques. He also spends time with each student to find out his/her best learning style (Visual, Auditory, Kinesthetic).

Working in Mathnasium since 2011, Bon found this position as a perfect place to fulfill his goal of teaching math to children and reach out to the local communities in Glendora and the surrounding area.

Besides teaching, Bon also has different kinds of hobbies such as photography, biking, guitar, etc. He is also one of the advisors in the College Fellowship in his church, First Chinese Baptist Church Los Angeles. In addition, he has been visiting different third world countries, along with his lovely wife Athena, in order to help the people in needs and to share the Good News with them.

Cynthia Medina, Assistant Center Director

Cynthia is a graduate of Azusa Pacific University. She majored in Business Economics with a minor in Mathematics. She hopes to soon get a master’s degree in education and teaching credential. She enjoys working with kids and is passionate about the difference she can make in their lives.







 Alcira Terrazas, Lead Instructor

Alcira is a Chemical Engineering major at Cal Poly Pomona. Her favorite subjects are math and chemistry. In her free time she enjoys hiking and reading.








Evan Arnold, Instructor

Evan is a graduate of Westmont College, and former valedictorian of Glendora High School. Born and raised in Glendora, Evan finds the surrounding community to be profound advocates of education. As an avid math enthusiast, Evan hopes to instill a lifetime love of learning in mathnasium's attendees. 






 Joshua Kiernan, Instructor

Joshua join our team last year in 2016. He is currently studying as a Mathematics major at Cal Poly Pomona, with plans to get a master's degree in education. He has always been passionate about making math accessible and fun for all students.








Eduardo Guillen, Instructor


Eduardo is currently studying Chemical Engineering with minors in Materials Engineering and Chemistry. He is also planning to get a master's degree in Materials Engineering at Cal Poly Pomona.  He previously tutored and taught golf to students of all ages.  In his free time, he likes to spend on golfing and exploring the world. 




Oscar Flores Sanchez, Instructor

Oscar recently graduated with a degree in Electrical Engineering from UC San Diego. He is an advocate for creativity and enjoys blending science with art at all times. He is a lover of ice cream, soccer and music.









Stephanie Rangel, Instrcutor


Stephanie is currently enrolled at Cal State Long Beach with a degree in Liberal Studies to become an elementary school teacher. She will soon be graduating this upcoming Spring 2019 and would like to further her education and obtain a Masters in Mathematics to later become a Math teacher as well. She has always like working with kids and showing them different ways in which they can learn math and find out which way is easier for them. Math has always been her favorite subject and what better way to use it than here helping students learn and excel in it.