Contact Us for a FREE Trial!

How did you hear about us?

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:

Bernardo Cobos, Center Director

Mathnasium Certified 

Bernardo comes to us after graduating from UCLA with a degree in Mathematics with Specialization in Computing  - then travelling through South America for two months! While in school, he was a resident assistant (RA) and served as a peer learning facilitator for underrepresented college students. Bernardo has been tutoring students from second grade through college mathematics since 2013 and would like someday to work in artificial intelligence/machine learning. He enjoys playing the electric bass, video games and learning new things.

Bernardo is enamored with Mathnasium’s curriculum and teaching style and wished he’d had that growing up! His favorite thing about math is finding common structure between seemingly disparate ideas.

Advice to Mathnasium students –  There are times math is going to be hard, or frustrating, or just flat-out boring. Keep working through those hardships, and your view of the universe will be forever changed.

Fun fact – Bernardo has been to Comic Con five different years

Favorite number -  2, because it was my elementary school classroom number for two years in a row (5th and 6th grade)

Math joke - There are 10 types of people in this world. Those who understand binary, and those who don't.


J. Steve Santacruz, Owner

Steve likes to call himself a 'recovering attorney.'After practicing law for nearly 20 years, Steve found Mathnasium and reinvented himself as a franchisee. One of Steve's main passions in life is teaching children. He has been a little league baseball coach since college and enjoyed coaching his own two boys. Steve brings that passion to Mathnasium - hoping to influence and enrich the lives of children through nurturing a passion and appreciation for math.

Steve and his wife, Karen, are humbled to be recognized as one of the top 5 performing franchisees in the Mathnasium system. Steve and his wife, Karen, are busy raising two sons, Austin and Dylan. They look forward to serving your family!


OwnerKaren Santacruz, Owner

Karen graduated from Western Illinois University with a Bachelor of Science in Physical Education with an emphasis in Athletic Training. She has a Master of Science from Northeastern Illinois University in Exercise Science and Cardiac Rehabilitation. Before starting a family Karen worked as an Athletic Trainer for Illinois Sportsmedicine and Addison Trail High School. She then taught physical education and was the Head Athletic Trainer at Stevenson High School. While raising their two boys Karen has taught PE part-time, coaches her sons' sports teams, is a substitute teacher, and volunteers her time in boy scouting and at St. Joseph school. Karen loves working with children, and is excited about opening Mathnasium!! She has always been a strong advocate for developing fitness in children, and knows how important math skills are to the overall educational development of a child. "


Sam Larimer, Director of Training/Operations Associate

Sam hails from northwest Indiana, where he completed his B.S. in Mathematics and minor in Civil Engineering at Purdue University Calumet. His interests vary all over the spectrum, from the great outdoors to an engrossing role-playing game to rooting for the Cubbies, Bears & Blackhawks. Most of all, though, his adoration for math has led him to pursue interests in actuarial science and statistics. New to the North Shore, he is excited to help Mathnasium students break into the puzzle-solving world of math that he’s enjoyed his entire life.