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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:

Center Director/OwnerDan Gehlbach, Center Director/Owner


*Mathnasium Master Certified*

Thanks for visiting our website! My name is Dan Gehlbach and I serve as the Center Director as well as own the West Des Moines Mathnasium location. Please don’t hesitate to call me or fill out the form above to find out more about how we can help your child. 

I am a native of Urbandale and graduated from UHS. I have lived all over the world but settled back in the Waukee side of Urbandale in 2006. Before opening our center in West Des Moines in early 2011, I was in the auditing field and a Certified Internal Auditor. I have an undergraduate degree from the University of Kansas and a MBA from Arizona State University. I have worked as a high school teacher overseas, a corporate auditor for the big casinos in Las Vegas, and in the insurance and healthcare industry.

I have a wonderful wife, Staci, and 2 fantastic daughters. My oldest is now a 4th grader in the Waukee School District at Walnut Hills Elementary as well as a proud Mathnasium student. My youngest is 7 and is in 1st grade and has started "mathing" with us as well. She can be seen around the center grabbing as many Smarties candies as she can.

After learning more about Mathnasium and seeing what it offers kids, I took the risk and started Mathnasium of West Des Moines 7 years ago. It has been tremendously rewarding to help kids in our community and see them reach their potential. We have hundreds of amazing success stories as a result of our Passionate Instructors, the Inspiring Learning Environment, Teaching Style and Curriculum at Mathnasium! Let Mathnasium help your student! 

I serve as a board member for the Waukee Schools Foundation as well as the Waukee Area Chamber of Commerce. I am passionate about public education and helping kids excel. 

MartinekLarry Martinek,

Chief Instructional Officer, Developer of Mathnasium Program. 

Larry has spent his entire career finding a better way to teach math. From inner city to public schools, to acclaimed magnet schools, to leading private and parochial schools, Larry has served as both a classroom teacher and as an educational consultant. He has designed curriculum, teaching strategies, and teaching materials designed to help students and teachers learn math more effectively. He has trained teachers in the art and science of boosting student’s ability to “do” math, thereby increasing student’s math scores and feeling of self-worth. Larry is the developer of Mathnasium’s educational program – one of the most comprehensive and innovative curriculums ever produced for teaching math.

While Larry is not an Instructor at our Center, He is a valuable asset we can call on to ask about specific students scenarios for guidance and advice. This has helped to make visits more productive and enjoyable for many of our students. 

Public Relations Director/OwnerStaci Gehlbach, Co-Center Director/Owner


I feel lucky to have the opportunity to channel my love of working with children and watching them achieve success at Mathnasium. I get to spend more time in the center working along side Dan now that our kids are now both in school.  

I graduated from Texas Lutheran University with a Bachelors of Arts degree in Elementary Education.  I have taught in school districts in Texas, Nevada, and most recently in West Des Moines. Outside of Mathnasium I also serve as Manager for Pied Piper Studios.  

Lead InstructorGreg Turnbow, Lead Instructor

 I love working at Mathnasium because of the kids. Seeing their eyes light up when they get a new concept or raise their grades gives me satisfaction and joy. Math is just a problem to be solved, it's a matter of finding the solution. 

Favorite Number: 42 - due to Jackie Robinson and Hitchhiker's Guide to the Galaxy


Lead InstructorWill Thornton, Lead Instructor

I am a graduate of Drake University with a Bachelor’s degree in Actuarial Science and Finance.  I enjoy working at Mathnasium because it lets me help kids truly learn and understand math, the way I understand it and the way Larry Martinek understands it.


Favorite Number: 3 - Because the School House Rock song for the number 3 has been stuck in my head since I can remember. Also, the rule for divisibility by 3 still blows my mind - its simple yet easy to apply to large numbers. 

Lead InstructorClare McKenzie, Lead Instructor

I am graduate of Georgetown University with a degree in Art History and French. I am also a former Middle School math teacher, camp counselor, and nanny.  I like that Mathnasium really is a place where kids learn to like math, and being a part of that growth is really exciting for me.  Plus, I'm a math dork, so I enjoy it too!


Favorite Number: 1 - Because it is special (not because it is the loneliest number).  


Lead InstructorNichole Greseth, Lead Instructor

I am a former middle school and high school math teacher with a degree in math education. I am currently a nursing student at DMACC. In addition to Mathnasium, I also work at Blank Childrens Hospital. In my free time I like to go on bike rides with my dog, Zazu . 

Favorite Number: 0245 - Because 2:45am is a great time to be awake.  



Lead Instructor

Brett Jolly, Lead Instructor

Outside of Mathnasium I work as a paralegal and home inspector. I have a B.S. in Mathematics from Iowa State. 

Favorite Number: 5 - Because it was the number I wore when I played basketball. 










Lead InstructorMichael Bellinghausen, Instructor

I have a bachelor degree in accounting from AIB College of Business. Currently I work at the Hy-Vee corporate office in the accounting department. I love working at Mathnasium because helping kids with math is something I have done and enjoyed. Seeing kids understand how math problems work and have confidence to do them gives me great pride. 


Favorite Number: 4 - Because my first clear memory is my 4th Christmas. That has always stuck with me and I still have the present I got.  

Lead InstructorKelsey Einertson, Instructor

I graduated from the University of Iowa with a degree in elementary education and now substitute teach in Waukee. My favorite part about working at Mathnasium is seeing students' confidence grow. 

Favorite Number: 19 - Because it is Jonathan Toews' jersey number and it's a prime number. 


Lead InstructorHenry Parker, Instructor

I am a currently studying physics and computer science at Drake. Sounds fun, I know, but it is!

Favorite Number: 0 - Because it makes my life a lot easier.  


Lead InstructorChristian Higgins, Instructor

I am a senior at Drake studying actuarial sciences. While not at Mathnasium I enjoy playing tenor saxophone, listening to a variety of music, and rooting for my beloved Chicago sports teams. 

Favorite Number: e - Because it is rarely understood but incredibly powerful.   


Lead InstructorLauren Walker, Instructor

I graduated from Iowa State University with a degree in Meteorology but then went on to work in the insurance industry. Math has always been my favorite subject and I couldn't think of anything better than helping kids find the fun in math! 



Favorite Number: 0 - Because it is simple yet powerful. Zero by itself is nothing, but it can have such a profound impact on other numbers by making them much bigger or much smaller.  

  Austin Shilling, Instructor

  I am a graduate of Grinnell College with a B.A. in Mathematics and German. I enjoy working at

  Mathnasium, especially when kids see just how good they are at Math!  

  Favorite Number: 2 - Because it is the only even prime number. 




 Ty Albrecht, Instructor

 I am a junior at Drake University, studying Actuarial Science and Data Analytics. I like Mathnasium because I have the opportunity to share my interest in math with students and show them that math doesn't have to be as intimidating as it's often made out to be. 



Favorite Number: 26 - It's the only number between a square (25) and a cube (27)


Maddie Gibson, Instructor

I am currently a senior at Waukee High School and will most likely pursue a career in the math field. I enjoy working at Mathnasium because the Mathnasium teaching methods and the center's fun learning enviroment shows kids that they can be successful in math and have fun while doing it! 

Favorite Number: 9 - Because my eight-digit birthday contains five nines. 



  Dexter, Math Dog

  I enjoy meeting all the Mathnasium Mathletes and getting lots of pets!

  Favorite Number: 711 - Because that is my Birthday! 7/11