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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:


Dave St.Leger, Instructor/Center Director/Owner

Dave grew up in Chicago and earned a BSEE with a minor in math from N.I.U.  He did post-graduate work at FAU in Florida where he worked at Motorola for many years at several locations as an engineer, product & design manager, & technical sales account manager.  He later worked at Broadcom Corp in business development & executive account sales.

An avid sports fan and participant since childhood, Dave has coached many kids (and adults) in several sports.  He has been involved in tutoring since high school at Brother Rice in Chicago and loves working with kids of all ages.  He has a sincere interest in mathematics and especially in helping kids to be as successful as they can be at math and in life. 


"I love math and working with kids.  I believe that EVERY child has the chance to be amazingly successful if given the right opportunity and instruction.  Mathnasium has the tools and instructors  to help make math success possible for every child who is able and willing to take that first step. I'm proud to be able to offer our services to our community kids and young adults.  It's a great program that really, really works ."

Dave lives in Johnsburg with his wife, two boys,  and a very playful golden retriever.  He has many interests and, along with his wife, shares a significant interest in the musical development of their sons as they pursue their passion for playing and performing Jazz.  He believes that McHenry County is a great place to live and raise a family and he's very excited about being able to give back to the community through Mathnasium.

 Gabe McKenna, Instructor


 Gabe currently attends Marian Central Catholic in Woodstock and is in the Algebra 2 Honors program there.  In addition to working with math, she enjoys singing in the Madrigal choir and playing clarinet in the band and pit orchestra. She is also a rookie on the Hurricane’s Dance and Poms team. 


A few of her aspirations for the future include traveling the world, becoming a well-known scientist, and graduating as valedictorian. Stanford is her dream school, although it's pretty far from home. Her other interests consist of reading and keeping up to date with Harry Potter, Star Wars, and other exciting stories.
Favorite Number:  7 of course! It has always been a tricky one.
Favorite Math Joke:  Why did Fibonacci make the football team?  His spiral: it was golden.
In 5 years I will be...working on my major, either in the field of physics, biology, chemistry, or a combination! It’s hard to choose.
I love Mathnasium because: math is awesome and Mathnasium helps kids have fun with it.
Fun fact:  I have a twin brother, but I'm more likely to be approached by my two cats.


 Ben Orkild, Senior Instructor


Ben attends Richmond-Burton Community High School and is on the Math and WYSE, both of which have had great success thus far.  

While he is not doing math, Ben can be found in the band room practicing his saxophone, or playing football on the varsity high school team.  After high school, Ben hopes to study Biomedical Engineering at Georgia Tech. 

Ben is enjoying his Senior year and all of the fun and challenges that are coming his way in football, band (saxophone especially!), the WYSE team (he has many interests there!) and, yes, you guessed it- MATH!

Outside of school, Ben enjoys camping, watching professional sports, and swimming.


Favorite Math Joke: Why didn’t the Romans find algebra very challenging?  Because X was always 10. 


Elizabeth Wacaser, Senior Instructor
Elizabeth is homegrown from right here in McHenry County country.  One of her earliest memories is of her dada playing a game with her every night to practice skip counting right before dreams about math were inevitable!
She is interested in a wide range of subjects but math is her favorite.  She had been teaching math privately for over four years now before joining our team and, in addition to her efforts at Mathnasium, she continues to work on math at home with her younger siblings as part of their homeschooling curriculum.

In her free time, you can find Elizabeth playing one of several musical instruments (piano, guitar, violin/fiddle, mandolin, and ocarina), working in her 690.81 sq. ft. vegetable garden, helping to lead in her church's children's ministry, or practicing her Spanish.  She loves kids, languages, the outdoors, foreign cultures, and square dancing.  And did we mention math as well??

Fun fact: Elizabeth has been to eight (8) different countries on three (3) different continents. She has also seen the Pacific and Atlantic Oceans from both the western and eastern shores!

Favorite math joke:  There are 10 kinds of people in the world: those who understand binary and those who don't.

Bailey McCrea, Instructor
Bailey is a sophomore at McHenry County College and is studying for an Associate's Degree in Engineering Science.  He then hopes to transfer to the Chemical Engineering Program at U.I.C.  
Bailey loves hiking, fishing and working on many different hobbies and projects. His favorite subjects, besides Math, are Chemistry (of course!) and also Physics.
He has  been a member of the Math and Engineering Clubs at Marian Central as well as the Chemical and Biological Engineering Club at Montana State University.

Fun fact: Well, this young man has a small beekeeping business- that's got be be fun!

Favorite math joke:  A farmer counted 196 cows in his field but when he rounded them up there were 200

Kieran McNally, Instructor








A+bout our Instructors


Well-known facts:  

  • They are all very good at math (and many other subjects as well).
  • They all love working with kids.
  • They receive on-the-job training both "live" and on-line after they start working (having fun!) at Mathnasium.  We all continue to learn and grow with each new student and new challenge.
  • They are all great additions to and a part of our ever-growing nationwide team of outstanding Mathnasium instructors.  They rock!!
Less-known facts:  
  • Before we all loved math we liked it a lot!  Some of us even struggled (actually all of us did at some point!)
  • All of us are musical in some and math, like chocolate and peanut butter! 
  • We only break from teaching math to learning more of it- and there is a LOT to learn!
  • We all love animals: some are cat people, some are dog folk...which are you?
  • We all actually have a sense of humor- especially math humor.  Is there anything funnier than a good math joke??

Our Center




It's great weather and a great location to work on Math!


Summertime is a great time to catch up and even get ahead!



 Math?  It's fun!


A nice shot of our warm & welcoming Center!  Come see it!!



Working hard or having fun?  Actually, BOTH!!!


It's warm oustide but the Math inside is even HOTTER!


Time for a quick break & cool drink before getting back to those Fun Fractions!



WInding down after yet another successful Math session.  

"I can hardly wait untli next time!!"






 A sad farewell to Miss Jaclyn in February!  Good luck to her in Chile!!