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.

Andy Benitez Lopez

Assistant Center Director
Andy was born and raised in Fresno. He currently attends Fresno State and is majoring in Mathematics in hopes of one day becoming a Math teacher. He attended Edison High School, where through their engineering program, he developed a passion for science and technology, as well as community service. In his free time, he likes to play video games and paint.

Daniel Hieng

Daniel has been attending Fresno State as a Mathematics major. He has plans on becoming a Mathematics teacher at either the High School or College level. Daniel attended Corcoran and Golden West High Schools. Daniel likes gaming and helping others.

Sarah Bozsum

Sarah grew up in Fresno and graduated from Edison High School. She is a Biology major at Fresno City College, transferring to Fresno State to complete her bachelor's degree. Her career goal is something in the realm of microbiology or zoology.

Sebastian Herrera

Sebastian grew up in Orange Cove. He is attending Fresno State University, studying Math. Sebastian loves working at Mathnasium and seeing the progress of our students every day.

Rick Castrapel

Franchise Owner
Rick is a retired Community College professor, teaching Mathematics and Computer Science. He holds a Master's Degree in Mathematics from Claremont Graduate University.

Justus Carlisle

Justus has a master's degree in mathematics from Sacramento State University. He loves helping Mathnasium kids with their math and teaching them chess during the "cool-down" period.

Angel Hieng

Angel has lived all over the Central Valley. She is currently working towards her career in IT. She hopes to see our students' work continue to grow through their learning here at Mathnasium.

Avery Langley

Avery is a high school senior at Edison. He has taken AP Calculus and is currently enrolled in AP Statistics. He is also stage manager for a theater production. Avery plans to attend UC Santa Cruz and major in biology.

Kason Fite

Kason has an A.S. in mathematics/physics from Fresno City College. In his spare time, Kason likes to coach baseball. He is thrilled to see the growth and progress in Mathnasium students.

Stephanie Angeles

Stephanie is a student at Fresno City College. She plans to transfer to Fresno State and major in accounting with the goal of becoming a CPA. Her interests include photography and helping young math students.

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.

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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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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