Kenilworth
554 Green Bay Rd
Kenilworth, IL 60043
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.
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.
Billy brings a passion for applied mathematics and teaching to his role at Mathnasium. He earned his Master’s in Mathematics from the University of Missouri, where he studied applied math and taught College Algebra. Before joining this center, he served as the Center Director of Mathnasium of Lincolnwood. Billy enjoys exploring how math connects to the world around us. Outside the center, he stays active with rock climbing, playing frisbee, and solving puzzles. He’s excited to help students build confidence and discover the joy in math through meaningful, engaging instruction.
Javier Santacruz graduated from DePaul University with a B.S. in Accounting and later earned his law degree there. A lifelong advocate for children, he was drawn to Mathnasium’s mission of helping kids understand math in a way that truly makes sense. That mission quickly became his passion—and his second career.
When he’s not working with the team, Javier enjoys time in the country, reading, and reflecting on the joy of helping others grow. He and his wife Karen raised two sons, and now dedicate their time to giving back through education.
Karen Santacruz holds a B.S. in Physical Education from Western Illinois University and a Master’s in Exercise Science and Cardiac Rehabilitation. Her early career included teaching and serving as Head Athletic Trainer at Stevenson High School. While raising her two sons, she also coached youth sports and volunteered in scouting.
Karen has always been passionate about child development and loves working with students. She believes the Mathnasium Method is powerful because it helps kids develop a lifelong love of learning by making concepts clear and approachable.
Betty Wang graduated from New Trier High School and earned a B.S. in Biomechanical Engineering from Northwestern University. She blends her analytical background with a deep appreciation for student support and learning environments that reduce fear and frustration.
At Mathnasium, Betty helps ensure each center operates smoothly while maintaining the core values of encouragement and clarity. She’s proud to be part of a team that empowers students to embrace math with confidence and curiosity.
Teach children math so they understand it, master it, and love it. Math can change their lives, and they can change the world.
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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(847) 251-3200
(847) 251-3200
