Mathnasium 201 Stryker Road, #4, Phillipsburg NJ 08865 (908) 213-6284

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OPEN ONLINE, physical location temporarily closed due to COVID-19

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:

Todd Velianski, Center Director

Todd is friends with three leprechauns. Well... he knows three people who were the mascots for the Fightin' Irish of the University of Notre Dame, where he earned his BA after graduating from Phillipsburg High School. He also earned his master's degree from Boston College. Todd has been an instructor using the Mathnasium Method since February 2017. His students know him for his quirky sense of humor and his insistence on learning the Latin and Greek roots of mathematical terms. Todd is hands-on and still instructs higher level math. While math is Todd's favorite language, he enjoys studying foreign languages in his free time. He also loves physical fitness, boxing, and blaring 90s music that the kids these days call "old."


Lisa Pysher, Instructor

Lisa has extensive classroom experience. She has worked in a variety of educational contexts for thirty years, teaching both Algebra I and II, and Geometry, among other high school math courses. Her experience with all ages and skill levels, and her desire to help students build confidence in their math ability enables her to motivate every student to success. Lisa has her Master of Science in Education as well as a BS in Mathematics Education. When she is not teaching, Lisa enjoys gardening, spending time with her children, and the Outer Banks of North Carolina.


 Edward Harwelik, Instructor

Prior to becoming an Instructor at Mathnasium, Edward worked for over 28 years in various Finance positions at Verizon, including 14 years supporting International Operations. He is bilingual, fluent in both English and Spanish, and has a B.S. degree from the University of California at Northridge, as well as a Certified Finance Planner (CFP) certificate from New York University. In his spare time, Edward enjoys running his middle school daughter to school, band rehearsals and basketball practice, as well as keeping in shape with strength training.


Emily Thompson, Instructor

There’s nothing Emily loves more than helping people through the various stages of joy and frustration that come with doing mathematics, and Mathnasium is the perfect place for that. Emily is a 2014 graduate of Phillipsburg High School and a 2018 graduate of the College of New Jersey, where she majored in math and literature. She is currently pursuing a master’s degree in mathematics secondary education at Rutgers University. Emily also enjoys contemporary fiction, non-contemporary dance, and learning about the proper usage of modern slang from her students.


Abigail Stadelmann, Instructor

Abigail has always taken pleasure in learning about math and also teaching the knowledge that she picks up along the way. Abigail is a Junior at Phillipsburg High School, and she aims to make math easy for every student that she encounters. As an AP math student, she understands the effort needed in education and is willing to give it her all to make sure another student “gets it.” She is from Lopatcong, so she is familiar with the community and school system. Abigail is in Honor Society, Debate Club, and the Veteran’s Day tribute team. Outside of this rigorous schedule, Abigail enjoys hiking, ice skating, and baking with her friends and family.

Barry Schaffer, Instructor

Barry is an artist and a scientist. He has a B.A. in Mathematics from King's College in Wilkes-Barre and a B.S. in Finance from Muhlenberg College in Allentown, but is sharing his gifts with us despite his allegiance to the great state of Pennsylvania. Barry has volunteered for many years working with kids through volunteering and youth sports, and he once won a Fraud Buster award for his tireless work uncovering corruption. He's basically Batman. He is known for his great sense of humor working with students and his heroic catch phrase, "Fly Eagles Fly!"

Lianna Krouse, Instructor

Lianna is currently a student at Phillipsburg High School. She was born in China and was adopted by her parents at fourteen months old. She is the middle child in her family with one older sister and a younger brother. She also has two dogs, Sport, a black labrador and border collie mix, and Eloise Antoinette, a dachshund-chihuahua mix. In school, her favorite subject was always mathematics. She aspires to attend Moravian College and become a math teacher in her future. Lianna also hopes to keep music in her life, as she has played the piano since the age of five and the trumpet since the age of nine. She is currently in the Phillipsburg High School marching band.