Our Team at Mathnasium of North Fontana

Kathleen U-M

Kathleen is the Assistant Center Director at Mathnasium of North Fontana. She holds a B.S. in Psychology and a teaching credential in Secondary Mathematics. With four years of experience as a middle school math teacher, she thrives on helping students grasp challenging topics and gain confidence. Her love for classroom teaching inspired her move to Mathnasium.  

In her free time, Kathleen enjoys hiking, baking, walking outdoors, and playing Disney video games. She’s passionate about making math engaging and fun for every student. 

Daniel B

Daniel graduated from Southern New Hampshire University with a B.S. in Game Programming and Development. A former youth leader and professional musician, he brings creativity and energy to his role at Mathnasium. Daniel enjoys helping students see that math can be simple and rewarding. He especially values those “aha!” moments when students grasp new concepts.  

Outside of work, Daniel enjoys recording music, building websites, and playing video games like Destiny 2 and Diablo 4. He’s passionate about blending technology, learning, and fun. 

Alexander M

Diego G

Eric G

Eric is the Owner and Managing Director at Mathnasium of North Fontana and Mathnasium of Corona. He has an MBA from California State University of Fullerton and a Bachelor of Science in Chemical Engineering from University of California at Irvine. Eric started his career as an Engineer in the Chemical and Aerospace Industry and later transition into management role in a publicly traded Pharmaceutical Company. After decades of working in the corporate world, he decided to pursue his dream of starting his own business. He currently owns other businesses but his passion for teaching and working with children led him to Mathnasium. There is nothing more rewarding than coaching and guiding a young mind and watch them learn and grow. The Mathnasium method is in perfect alignment with Eric’s teaching philosophy where we focused on teaching for understanding and in a way that makes sense to the child.