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.

Larry Martinek

Creator of the Mathnasium Method
Larry has spent his entire career finding a better way to teach math. From inner city to public schools, to acclaimed magnet schools, to leading private and parochial schools, Larry has served as both a classroom teacher and as an educational consultant. He has designed curriculum, teaching strategies, and teaching materials designed to help students and teachers learn math more effectively, He has trained teachers in the art and science of boosting students' ability to "do" math, thereby increasing students' math scores and feeling of self-worth. Larry is the developer of Mathnasium's educational program - one of the most comprehensive and innovative curricula ever produced for teaching math. While Larry is not an instructor at our center in Creve Coeur, he is a valuable asset and we can call on him to ask specific student's scenarios for guidance and advice.

Stuart Klamen

Assistant Center Director
Mr. Stuart Klamen received his Bachelor's degree in Pure Mathematics from Hebrew University. He has taught math in the classroom from elementary school through high school. His favorite number is 32, which was also his high school basketball jersey number. He enjoys cooking and is known for cooking for a lot of people.

Renee Fredman

Lead Instructor
Ms. Renee Fredman has over 15 years of experience in public education and nearly 20 years of experience in marketing research. She completed her Missouri teaching certification in mathematics in 2017 and expects to finish her graduate degree in middle school math education in 2019. Her undergraduate degree is in business administration. Renee’s favorite number is 18 because it is the average of her two sons’ birthdays.

John Moritz

Mr. John Moritz received his undergraduate and graduates degrees in Engineering Management from Missouri Science and Technology University. After a lengthy business career, he earned his mathematics teaching certificate from the American Board in 2018. John is excited to be part of the Mathnasium team, and is committed to providing the best instruction possible to its dedicated students.

Melissa Lopresti

Ms. Melissa Lopresti received her B.A. in both Mathematics and in Intelligence Studies. Her favorite number is 2 since it is the only even prime and number. She is an RPCV (Returned Peace Corps Volunteer) from Lesotho. Her weekends are spent geocaching, playing volleyball, and travelling.

Sahi Jilakara

Ms. Sahi Jilakara is a high school senior at Rockwood Summit and an upcoming medical student at UMKC's School of Medicine. Her favorite number is 9 just because it has always been lucky for her. She is also a professional dancer and teacher at a family-owned school for the arts.

Our Mathnasium Mission

Teach children math so they understand it, master it, and love it. Math can change their lives, and they can change the world.

What I love about Mathnasium is the ability to teach problem-solving skills and make math make sense, while also making a student smile.
Amber W., Mathnasium Instructor

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Want to join the Mathnasium team?

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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