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.

Alan Lowell

Co-Owner & Center Director
Alan is the co-owner at Mathnasium of Plainview-Hicksville. He has over 30 years of experience in technology, including work at Microsoft and computer security leader Proofpoint. While at Microsoft, Alan was a student activities coordinator for the DigiGirlz program, promoting access to STEM education for young women. He attended New York Institute of Technology. Alan believes in Mathnasium because it offers students a strong foundation in problem solving and critical thinking skills, which he knows are important for excelling in any technical field. Alan enjoys strategy board games and spending time with his bouncy chocolate lab, Opie.

Adam Ruggiero

Lead Instructor
Hi, my name is Adam Ruggiero! I have a Bachelor's Degree in Applied Mathematics from the University of Connecticut and can remember loving Math from a young age. I have always wanted to make a positive impact on people’s lives, so being able do that with my passion for Math made Mathnasium perfect for me! One of the things I love about Math is how numbers connect the world around us and can give us deeper insights into any topics someone might have interest in.

Preetam Potnis

Nobody tells Preetam's story better than she does herself, so we'll let her take it away: HiI I am Preetam Potnis. Despite having a bachelor’s of pharmacy and working as a pharmacist for almost four years, I chose teaching as my profession because of my passion for Math & Art. I have been teaching Math & Art in India & Dubai for more than 30 years. After coming to the U.S. in 2019, I worked as a Math tutor elsewhere in Plainview till the outbreak of the pandemic. After the pandemic came to an end, I joined Mathnasium & also taught art to adults in The Plainview-Old Bethpage public library. Working with Mathnasium is a wonderful experience for me. I have always been teaching children from Kindergarten to Grade 11 & being with them keeps me young at heart forever. 🙂

Logan Bruno

Former Instructor

Rachel Otero

Former Instructor

Aviva Friedman

My name is Aviva Friedman. I am a sophomore at Binghamton University double majoring in Mathematics and Economics. I have loved math since I was a child and I enjoy the creativity and problem solving needed for math. My goal is to share my love of math with students so that they too can appreciate its importance and beauty.

Felippe Ferrer de Andrade


Angela Sadlis

Former Instructor
Angela spent well over a year and a half with us, where her expertise in encouraging students helped those who were really struggling to get back on board with learning, and inspired many others to keep up and get ahead. She achieved a bachelor's degree and master's degree in Adolescent Mathematics Education/Special Education, and a bachelor's degree in Mathematics, in May of 2023. She is now teaching mathematics for special education at the secondary level.

Joe Panarelli

Former Instructor
Joe was an Instructor with us for 2 years! During a 35-year career at Con Edison, Joe worked as an environmental and safety regulation specialist. After leaving that career, he taught industrial safety and environmental compliance to a variety of corporations and organizations. He is also a proud father of 4 and grandfather of 8. He thoroughly enjoyed bringing his warm demeanor and teaching expertise to our students! His real passion is for interacting with our students so that they feel comfortable and confident learning math with us. He knows that when students are in a great learning environment with the presence of expert instructors, they enjoy themselves, gain confidence, and look forward to continuing their learning at Mathnasium.

John Chang


Harry Tsesmetzis


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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