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.

Andre Bertrand

Co-Owner

Andre earned an Electrical Engineering degree from McGill University and worked for over 25 years in telecommunications and multimedia before bringing Mathnasium to Albany-Berkeley. 

Previously a Senior VP at iHeartRadio, Andre has lived and worked across Canada, Germany, Panama, and the U.S. As a parent and educator, he’s committed to offering personalized, engaging math instruction that meets students where they are. 

Christopher Wood

Co-Owner

Chris holds a B.S. in Finance from San Diego State University and has over 14 years of accounting experience, including auditing at KPMG. He now runs Mathnasium of Alameda and co-owns Mathnasium of Rockridge. 

A dedicated coach and problem solver, Chris brings both analytical expertise and a deep commitment to student success. Outside of work, he enjoys swimming, water polo, and spending time with his two sons. 

Sophie Frederiksen

Instructor

Sophie is currently a senior at Oakland Technical High School, where she is taking both AP Calculus BC and AP Statistics. Through her experience babysitting and being a camp counselor, she has found a passion for working with kids. In her free time, Sophie loves backpacking, playing soccer, and baking.  

Ellen Shaler

Instructor

Ellen has over 30 years of classroom experience, including 25 years in Oakland Unified School District teaching 4th and 5th grade math and science. 

Originally from Detroit, Ellen holds a teaching credential from the University of Michigan. Now retired, she volunteers and tutors at Mathnasium, bringing warmth, number sense, and her favorite saying: “Math is good and good for ya. We love math!” 

Rose Reining

Instructor

Rose is currently a student at Piedmont High School, where one of her favorite classes is her AP Calculus BC class. Aside from tutoring her peers during school, Rose has also been a camp counselor, where she gained experience helping elementary school girls learn math. Other passions of hers include crocheting, beekeeping, mountain biking, and ballet.  

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

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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