Welcome to Mathnasium of San Marcos

The San Marcos Mathnasium team took our daughter from frustrated to confident. In addition to (no pun intended...

MIke Moon

Mathnasium in San Marcos is fantastic. Our daughter loves it, which blows my mind because she does not love ma...

Anne James

Contact us

San Marcos

  • 14 Creekside Drive, #104
  • San Marcos, CA 92078
  • Call (760) 593-7667
  • Text 7605937667

Hours of Operation

Instructional Hours

Mon-Thur 9:30AM-12:30PM & 3:30PM-7:00PM
Sat 9:30AM-12:30PM

Office Hours

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Hello. We are Kevin and Casey, Center Directors of Mathnasium of San Marcos, your neighborhood math-only learning center. We help kids in grades 1st-12th understand math by teaching in a way that makes sense to them

We specialize in math-only instruction with a focused, caring, and fun learning approach that delivers results.
We proudly serve local communities and schools, including:

  • Double Peak School
  • Twin Oaks Elementary
  • San Marcos High School
  • Mission Hills High School
  • San Elijo
  • San Marcos

Dedicated to providing the best instruction

Our instructors are enthusiastic about math and specially trained in the Mathnasium Method. They create a caring and encouraging environment where your child will learn and thrive!

Meet the Team gallery1

Instructor Spotlight

Casey Magnuson
Casey is the Center Director for Mathnasium of San Marcos. Before opening her Mathnasium Center, Casey taught for San Diego Mesa College and was the Center Director for another Mathnasium location. She has a degree in Math from UCLA and a Masters degree in Statistics from SDSU. Having worked at Ma(...)



One-on-One Assessment

Our unique assessment pinpoints what each child already knows and what they still need to learn.


Customized Learning Plan & Goals

Our detailed plan takes your child step-by-step from where they are to where they need to go.


The Mathnasium Method™

Our proprietary curriculum and teaching method fosters skills that take hold and build upon one another.

Latest News & Posts

Athletes and Mathematicians: The Perfect Pair

May 23, 2022 | San Marcos

Have you ever paused to consider how athletes continue to break records? How do they keep getting better and faster? The answer involves math! Many professional athletic teams now hire mathematicians to help them perform at their optimum ability. F..

What Can Mathnasium Offer Your Advanced Math Student?

May 21, 2022 | San Marcos

Does your student have unusual speed and accuracy while solving math problems? Can your student solve math problems in multiple ways? Does your student grasp math concepts and strategies quickly? Sounds like you have an ADVANCED MATH STUDENT! Yay..

Find out how Mathnasium will work for your child

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"Casey and Kevin have brought the joy back to math in our son. The environment they create at Mathnasium in San Marcos is so safe and welcoming that kids feel open to learning. I am so grateful to have found this center - our son will be going here for years to come!"

— Kamren Johnson

San Marcos

14 Creekside Drive, #104

San Marcos, CA 92078

United States