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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:

CenterDirectorTeddy Elsenbaumer, Center Director 

Teddy inherited a love of math at a young age from his mom, a 5th grade math and science teacher in his hometown of Ventura, CA.  He received his B.S. in Exercise Physiology and earned NCAA All-American honors as a Decathlete from California State University, Chico.  His passion for education and mentoring bloomed during his years as a graduate student and coach at Minnesota State University, Mankato.  His rewarding experiences, first as an athlete and then as a coach, have taught him the transformational power of confidence and growth mindset. Teddy's greatest joy comes from helping students believe in themselves and realize their potential.  


Ariel, Assistant Director

Ariel began studying Mathematics at El Camino Community College after switching directions from Political Science at University of California, Merced.  Throughout his academic career, he positively influenced by his peers with his tutoring work.  During his past three years of tutoring, he has worked with a wide variety of students from ages five all the way up to fifty.  Currently on the path to becoming a teacher, he became part of the Mathnasium team in order to help children develop a strong understanding in math, which can drastically change their lives.  He hopes to guide young students in their academic careers by showing them it is okay to make mistakes but to always work hard no matter what.  In his spare time he enjoys playing video games with his high school and university friends, cooking for his family, and following sports. 


Nick, Assistant Director

Nick Kotelko has loved math since he could remember. As a student growing up right here in Southern California, he always enjoyed the thrill of solving puzzles, and finding different solutions to problems in math and in other situations in life. This passion led him to earn a Bachelor's Degree in Mathematical Sciences from UC Santa Barbara in 2007. Go Gauchos! It was while at University that he developed a passion for helping eager young minds to excel at math. He began instructing local students, and together he found ways to discover the wonders of objective problem solving. Working with many students since then, it became abundantly clear that math can be excelled at by anyone with the will to succeed.


Maggie, Assistant Director

Maggie is a recent graduate from UC San Diego where she majored in Economics and Mathematics in the Honors program. Throughout her academic career she constantly found herself helping others, whether it was editing her friends’ papers or tutoring younger students. Maggie is specifically interested in the real world applications of math, and hopes to return to school to earn an advanced degree in a related field. Aside from academics, Maggie is an avid long distance runner and music lover, frequently participating in races as well as attending concerts. Maggie hopes to impart her passion for math to her students, and help them realize their full potential.


Elijah, Instructor

Elijah currently attends Cerritos Community College and plans to transfer to local university to major in mathematics. His rewarding experiences tutoring friends, classmates, and his little brother in math motivated him to join us at Mathnasium, where he is passionate about sharing his knowledge with students. During Elijah’s study of English he was inspired by the author Franz Kafka, and he intends to write his own collection of short stories. When he is not studying or writing he likes to go bowling, take his dogs running, and play video games. He is dedicated to making the most out of each lesson while sharing positivity and smiles along the way.


Lucy, Instructor

Lucy is currently a Junior at Redondo Union High School. She hopes to attend the University of Southern California and earn a masters degree in Applied Mathematics. Throughout her life she has always had a passion for math and helping others see that math isn’t as hard as it may seem. Lucy previously tutored middle school students and currently helps her fellow calculus students prepare for AP tests. She recently started a chapter of Mu Alpha Theta, the National math honors society, at her school and competes in California Math League Contests. Outside of work and school, she volunteers for a crisis hotline and helps to run monthly fundraisers for the Teen Group at her church. She is very excited to be part of the Mathnasium team and teach kids how fun math can be.