Welcome to mathnasium of Johnston-Grimes

Math is more complicated than ever so it's nice having this resource for both parents and kids.

Angie Bailiff

My 7 year old daughter used to cry every time we tried to do math with her. Mathnasium made her love math!


Contact us


  • 2810 SE Grimes Blvd
  • Grimes, IA 50111
  • Call (515) 985-5128

Hours of Operation

Instructional Hours

In Center or Online By Appointment Only
Mon - Thu 3:00 PM - 8:00 PM
Saturday (online only) 10:00 AM - 2:00 PM
Sunday (in center only) 1:00 PM - 4:00 PM

Office Hours

Call for Information
Daily, 9:00 AM - 9:00 PM
Center Director
By Appointment Only
Mon - Thu
2:00 PM - 8:00 PM
1:00 PM - 4:00 PM
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Hello! I'm Lauren Ness, Center Director of Mathnasium of Johnston-Grimes, your neighborhood math-only learning center. We help kids in grades K-12 understand math by teaching the 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:

  • Johnston
  • Grimes
  • Urbandale
  • Waukee
  • Granger
  • Dallas Center
  • Polk City

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

Lauren Ness

Lauren grew up in Virginia and moved to Iowa in 8th grade. She graduated from Iowa State University in 2018 with a degree in elementary education. She has tutored students in math since 2018 and loves watching her students grow and learn! In her free time Lauren enjoys reading, cooking, swimming,(...)



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

Adding Love to Learning

Feb 4, 2024 | Johnston-Grimes

Love is in the air, and at Mathnasium, we're all about spreading the joy of learning, especially when it comes to math! As Valentine's Day approaches, we've found a unique way to intertwine the world of numbers with the season of love.

A New Year, A New Perspective: Rediscovering the Beauty of Math

Jan 5, 2024 | Johnston-Grimes

Welcome to 2024, a brand new year filled with endless possibilities and opportunities for growth. At Mathnasium, we believe that the new year is an excellent time for both students and parents to gain a fresh perspective on math.

Upcoming Events

Summer Camp - June 24th-28th
Jun 24, 2024 - Jun 28, 2024
"Math is Fun!" Summer Camp, Grades 1-6. Click "More Details" below to learn how to register!
Summer Camp - July 15th-19th
Jul 15, 2024 - Jul 19, 2024
"Math is Fun!" Summer Camp, Grades 1-6. Click "More Details" below to learn how to register!
More Events brn

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"I appreciate the calm assistance the Mathnasium instructors give our boys."

— Brian Donaldson


2810 SE Grimes Blvd

Grimes, IA 50111

United States

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