Mathnasium 10443 Town Center Drive, #200, Westminster CO 80021 (303) 429-6284

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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:

Steve Lake, Owner

Welcome to our Mathnasium where we believe in the power of math and the mind! Prior to Mathnasium, Steve spent six years as the Operations Manager and a School Administrator for The American International School of Muscat in the gulf country of Oman, running the school’s security, safety, food service, transportation, facilities management, special events, and real estate departments. Making a difference in the lives of 800 students from 60 countries – including his own children – was transformative and Steve knew he wanted to continue that when he moved back to the USA in 2016. Steve deeply values the learning that comes with opening one’s mind to new places, ideas, cultures, and interests. As far as foreign languages, he speaks some Spanish, some Arabic, and Math. Steve earned a Masters of Business Administration from California State University in 2005 and a Bachelor of Arts in Radio-Television Production in 1997 from the University of Houston (Eat ‘Em Up, Coogs!).

Justus Leben, Center Director

Justus has a Bachelor of Science in Applied Mathematics from the University of Colorado, Boulder. He enjoys spending time playing strategy games and videogames with friends and even competing in tournaments. Justus also sang bass in a Men’s a cappella group at CU called “In The Buff.” Justus believes that everybody should seek self-improvement whenever possible and that math is a great avenue for learning about problem-solving, and about the interconnectedness of real-world applications of math. 




InstructorJim Keefe, Instructor

I am Jim Keefe.  I have recently retired after teaching all levels of Mathematics (middle school up to and including Calculus) for the past 33 years.  I love working with kids and helping them succeed through Math.  Math allows thinking to happen!  It is exciting to see students when they get that “ah-ha” moment and the light comes on for them!  I have worked with many age groups over the years ranging from middle school to high school, to adults.  I have a Bachelor’s of Science in Education, certified in Secondary Math, and a Master’s Degree with an emphasis in Adult Education, Professional Development.  I am excited about this opportunity to continue working with students and helping them succeed in Math!


Zen Han Chia, Instructor

My name is Zen, and I graduated from the University of Colorado, Boulder in 2018 with a degree in Astrophysics and a Minor is Computer Science. During my time in college, I took up a Learning Assistant position and really enjoyed teaching Calculus 1 and 2 since I had a strong grasp and love for math. I enjoyed it so much that I decided to go down this career path and see where it takes me.


I believe that a strong grasp of math will help a person both in his personal life and in his career, as this is a useful skill to have for doing basic things like counting change to tougher activities like investing. In my free time I like to spend time with friends and playing video games. I am planning to go back to grad school in the Fall of 2019 to pursue a phD in Computer Science.


Jackson Heetland, Instructor

My name is Jackson, and I’m a recent graduate from Standley Lake High School looking forward to studying some kind of engineering (there’s just so many to choose from!) at the University of Colorado, Boulder. Throughout my school career, I’ve had a lot of fun helping my fellow students with a variety of subjects, as well as tutoring music independently, and I wanted to explore this passion for teaching in one of my favorite subjects, math. Math is one of the most important skills to have, not just because of its role in developing critical thinking and problem solving, but also in its variety of real world applications. I can’t wait to help students become more confident in math, just like my teachers helped me.

In addition to enjoying math, I love spending time with my amazing friends and my adorable cat Ellie, playing video games, practicing the saxophone and guitar, and hiking.

Kylee Pon, Instructor

Kylee Pon is a Colorado native and a student at Legacy High School. She is in the school’s STEM (Science, Technology, Engineering, Mathematics) program as well as the Legacy Chapter of National Honor Society. Her favorite subject is math. She finds it fascinating the things in the real-world that can be explained or determined through the use of math. While she does not know exactly what career path she wants to pursue as of yet, she does know with certainty that it will heavily relate to math.


She spends her free time horseback riding. She competes in equestrian shows and also teaches lessons. She takes satisfaction in being able to help her students and help them grow. She strives to always find new ways to connect with and explain information students. It makes her happy to be able to help them gain confidence in their knowledge and skills. She not only loves horses but all animals. She enjoys camping with her family. One of her favorite hobbies is reading.