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

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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.


Ryan Lattner, Instructor

Math has always come naturally to Ryan, who enjoys learning and sharing his knowledge of math concepts with others. Ryan is a senior at Phillipsburg High School with the goals of one day using math in everyday life to make a living. He strives to bring out positive energy from students wanting help with math. There is nothing that satisfies him more than seeing a students face light up with enjoyment from understanding and learning new math concepts. Outside of his academic involvements, Ryan is a captain on the Varsity golf team for the Stateliners. And he likes to spend a lot of his free time enjoying the luxury of playing golf with family and friends.

Alain Gonda, Instructor

Throughout his childhood, math has been something that Alain has grown to love and excel in. He has always been good with numbers and has done well in his math classes throughout the years. Alain genuinely enjoys math and loves teaching and working with the kids, and his goal is to teach the kids math, and make it as enjoyable as possible. He brings positive energy, a great attitude, and math skill to the Mathnasium team. He plays basketball all year round together. Alain attended Lopat in his younger days and is familiar with the community. Some other things he enjoys doing is playing video games, going to the movies, and hanging out with his friends. He plans on attending college, and majoring in business someday.


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!"

Dalton Martin, Instructor

Dalton graduated from the University of the West Indies, Trinidad, with a B.S. in Mechanical Engineering. Since then, he as been gaining field experience in various industries including banking, ethanol dehydration, petroleum refining, bauxite mining, calcination of alumina and most recently, cement manufacturing. In addition, Dalton has lectured on Marine Pollution and Environmental Sciences at the Caribbean Maritime University in Kingston, Jamaica. His most memorable achievement in Math was being able to simplify otherwise complicated problems so peers could better grasp the concepts being taught. "Teaching," he says, "is the foundation upon which society is built and I am just one of the many builders."

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.