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.

Rachel Geyer

Assistant Center Director
Hi, my name is Rachel Geyer.  I've lived most of my life in Colorful  Colorado and graduated with my BA in Education from Colorado  Christian University and my Masters in Curriculum and Instruction from  the University of Phoenix.
Why I Love Working at Mathnasium:
During my first year of teaching I discovered a  passion for helping elementary students understand numbers and how  the apply them to every part of our lives.  I love it when a student who  professes to hate math start to complain that math time is over and begs  to keep working!  
I live in Aurora with my husband and our three silly dogs.  
In my free time, I enjoy spending time with my family and traveling.  Recently we took a trib to Moab, Utah to travel the back roads and take a hot air balloon ride.  Here in town, we love riding our bikes and discovering new fun places to eat. 

Barb Bennett


Short Bio:

Hello, I’m Barbara DeHaven Bennett. While I’m not a Colorado native , I have spent most of my life in this beautiful state.  I attended Bear Creek High School, Metropolitan State University of Denver and the University of Colorado at Denver.   I have two Bachelor’s degrees (Mathematics and Psychology) and a Master’s Degree in Secondary Curriculum and Instruction with a focus on Secondary Mathematics.

Why I Love Working at Mathnasium:

For twenty-nine years, I had the privilege of teaching high school math in Denver.   During that time, I worked with a wonderfully diverse group of students that came from over forty different countries and spoke over sixty languages.   There is nothing like the sparkle in a child’s eye when they have that “aha” moment of understanding.  Mathnasium provides both the students and me with the opportunity to experience that “aha” moment everyday.

Favorite Number:

Any number that is a palindrome - I love the symmetry!


I enjoy golf, skiing, reading, scuba diving, traveling and of course, math! In recent years I’ve had many wonderful travel opportunities including a tour of London and Scotland, and scuba diving trips to Mexico, Grand Cayman, and Hawaii. My favorite was the London/Scotland trip which included dinner in the Tower of London, a private viewing of the Crown Jewels and a round of golf at both St. Andrews and Gleneagles.

Dawson Kern

Lead Instructor

Favorite Number:

8, because it’s a power of 2 and one less than a perfect square.

Favorite Math Joke:

There are 10 types of people in this world: those who understand binary and those who don’t.

I Love Mathnasium Because...

It lets me do math, which I love, and help people out, which I also love. I really enjoy watching students go from struggling with a concept to being able to completely understand it and explain it to someone else.


In my free time, I enjoy reading and doing math. I also occasionally do some coding and play games with my younger sister.

Favorite Math Topic and Why:

I really like algebra because everything just comes together at the end when you solve it. For example, with systems of equations, you can easily check your result and see how you got what you did, which makes it that much more fun to solve.

Your Best Math Story:

My younger sister was never as interested in math as I was, but I would still sometimes explain things to her when she thought of a new question or was wondering how to do something beyond what her homework explained. After a few months of this, she announced that she had tested out of the next grade level in math because of what I had taught her. This was my first big experience helping someone with math, and I’m very proud of how it turned out.

Michael Carroll


John Braford


Catie Carter


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
Schedule Your Math Skills Assessment Today

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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