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.

Bob D'Orazio

Owner / Director of Operations
BOB runs the business side of Mathnasium of Washington Township. He manages the Center on a day-to-day basis and is usually the first person every parent and student sees or speaks with. The opportunity to blend his business background with Kathie's education background seemed like a perfect fit with Mathnasium. Bob feels that Mathnasium is a great vehicle to build confidence in kids. "The Mathnasium Method develops 'number sense' that helps them succeed in math, and a whole new world opens up to them. That, in turn, builds confidence that is born of real accomplishment, confidence that spills over into all aspects of their lives. We have seen students improve grades in other classes because they no longer worry about Math." Bob earned a B.A. in Communications/Public Relations from Glassboro State College and has also taken additional courses in Business Management/Human Resources. Bob worked in Retail Management for many years. He served as a Commissioner for the Housing Authority of the City of Vineland for 22 years, the last twelve as Chairman. He served on the School Improvement Team while his children were in grammar school, and has coached both in-line and ice hockey while his son was a player. Bob served on the Mathnasium Franchisee Advisory Committee for the first two years of the Committee's existence. Elected to serve as a member of a committee of eight franchise owners, serving as an additional channel of communication for constructive, open, and two-way communication between the franchisees and the management of Mathnasium. He represented Centers in the Northeast Quadrant of the US and Canada. Lifelong South Jersey residents, Bob and Kathie have two grown children, a granddaughter (who attends Mathnasium), and a grandson.

Larry Martinek

Chief Instructional Officer, Developer of Mathnasium Program
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 feelings of self-worth. Larry is the developer of Mathnasium’s educational program – one of the most comprehensive and innovative curriculums ever produced for teaching math. While Larry is not an Instructor at our Center, he is a valuable asset we can call on to ask about specific students' scenarios for guidance and advice. This has helped to make visits more productive and enjoyable for many of our students.

Nicole Engle

Instructor since 2014. NJ Certified Teacher of Mathematics
NICOLE graduated in the top 12% of her class from Gateway Regional High School in 2008. Immediately following, she attended Rowan University, graduating in December 2013 with a Bachelor's degree in both Elementary Education and Mathematics. She began her teaching career working part-time at Chestnut Ridge Middle School as a Basic Skills Instruction Aide, working with students from 6th to 8th grade in both reading and math. Nicole taught 3rd Grade at South Harrison Elementary School in a long-term substitute position for the first half of the 2015-2016 school year, and during the second half of the school year worked as an aide at Chestnut Ridge Middle School again. Nicole currently teaches 6th, 7th and 8th grade Math and Religion at Holy Angels Catholic School in Woodbury. Nicole believes that the Mathnasium Method is successful because it focuses on what each student needs in order to be successful, both at their current level of mathematics and beyond. With individualized instruction, students are given the tools they need to build confidence in their math skills. By providing opportunities for students to feel they can do math successfully, students are able to enjoy math and even have fun completing math problems.

Allison Gilbert

Instructor since 2016. NJ Certified Teacher of Mathematics
ALLISON attended Rowan University, earning a degree in Mathematics Subject-Matter Education. She graduated in the top 5 of her class from Glassboro High School in 2015. She started taking math classes at Rowan University her junior year in high school. She has taken Calculus II, and III, Ordinary Differential Equations, Linear Algebra, Discrete Math and Intro to Real Analysis at Rowan, along with all honors and AP math courses in High School like Algebra 1 and 2, Geometry, Pre-Calculus, Calculus AB and BC, and Statistics. Allison is a Math Teacher at Winslow Middle School. Allison loves math and helping others learn to love it, too. She believes that most people do not like math because they never understood the key concepts early on, which makes everything else difficult. If students were taught in a fun, engaging way- like the Mathnasium way- she believes everyone would love math. Allison believes that everyone learns differently, so the customized learning plan and one-on-one instruction at Mathnasium is very beneficial and lets the student have personalized instruction. This helps build student’s confidence, along with the balance between independent and one-on-one work. Once a student’s confidence is built, they will believe in themselves and their ability to learn and do well, which will make them a better student.

Zach Goodwin

Instructor since 2018. NJ Certified Teacher of Mathematics and Physics
ZACH graduated fourth in his class at Hammonton High School in 2015. He began attending Rowan University the same year, initially studying Computer Science and very quickly switching to Mathematics and Secondary Education with a Minor in German Studies. He earned his degree in May 2019. While attending Rowan, he took Calculus 1, 2, and 3, Discrete Mathematics, Linear Algebra, Geometry, Ordinary Differential Equations, and various other math courses. At Rowan, Zach tutored other students in these various Math courses, in addition to mentoring other students in the Math Department. Zach enjoys going out to see movies as much as he can, going to the shore, and discovering new music. Zach is a Math and Physics teacher at Pinelands Regional High School. Zach’s interest in Mathematics began in elementary school, as he found it to be both fun and challenging, beginning with personal challenges with learning how to solve Rubik’s Cubes and Sudoku Puzzles. He feels that many students struggle and become discouraged by math because their struggle hadn’t been facilitated in a way that feels personal, engaging, and, most importantly, productive. Zach believes that the Mathnasium Method opens the door for students to experience Math in a way that is personalized, relevant, and fun, which is a true benefit of a “one student classroom”. Not only can Mathnasium provide an opportunity for students to fill in learning gaps in math, but it also helps positively shape their perception in both their confidence and abilities.

Lauren Annicchiarico

Instructor since 2018. NJ Certified Teacher of Mathematics
LAUREN is entering her 29th year of teaching. She has a B.S. in elementary education, M.S. in middle-level education, and is certified to teach math K-12. She is currently a middle school math teacher in Tabernacle. In addition, she has taught at Berlin Community School and for the Lenape Regional HS District. Lauren has written a curriculum for the National Center for Teaching and Learning. She is married and has 3 children. Lauren loves math and always likes to see when a child gets the “a-ha, I get it” look on their face. Even though she has been teaching for quite some time, she has learned several useful strategies while working at Mathnasium.

Raj Patel

Instructor since 2019
RAJ graduated from Pitman High School in Pitman, NJ. He is attending Rutgers University, majoring in Finance and Mathematics. He discovered his love for Math after being a student for almost four years at Mathnasium. The Math classes he took in high school included Geometry A, Algebra II, Honors Pre-Calculus, and AP Calculus. He was also part of five clubs: National Honors Society (NHS), Future Business Leaders of America (FBLA), Yearbook, Key Club, and Student Council. In his free time, Raj likes to hang out with friends, play sports, and volunteer in the community. Before becoming an instructor, Raj signed up to tutor students in his high school providing a service opportunity for the National Honors Society. He tutored students up to Precalculus but he had been helping his classmates and friends in Math since freshman year. This had been a good experience for him because it helped him find easier ways to teach people to solve complex problems. Raj believes that the Mathnasium method is the reason that Math went from being one of the hardest subjects for him to the easiest and the most fun. He thinks that the Mathnasium Method could be helpful to anyone willing to give it a shot!

Chris Altamuro

Instructor since 2020
CHRIS graduated from Washington Township High School in Sewell, NJ. He is attending Rowan University, and he plans to go into the engineering field. Math has always been his best subject, excelling at it ever since he was a little kid. The Math classes he has taken in high school included Honors Algebra II, Honors Geometry, Honors Pre-Calculus, and AP Calculus BC, and AP Statistics. He was part of many clubs and activities, including Mu Alpha Theta (Math National Honor Society), Spanish National Honor Society, English National Honor Society, Science League, and Freshman Transition. He was also an executive board member of the Science National Honor Society. In his free time, Chris likes to play and watch sports, go fishing, and hang out with his friends and family. Before he was a Mathnasium Instructor, Chris tutored students in his school through the multiple Honor Societies at his high school. He is capable of tutoring students up to Calculus, including Statistics. He has helped his friends or classmates throughout his schooling career, even before high school. This has been a great experience for him so far because it has allowed him to work with younger students and learn how to teach to a different age group. Chris understands how difficult and frustrating math can be and wants to do everything he can to make it easier and more enjoyable for students. The Mathnasium method is new to him, but he is learning more every day about how to help each child he encounters. He believes that with enough hard work and the right mindset, Math can become easy for anyone.

Marissa Pestritto

Instructor since 2020
MARISSA graduated from Washington Township High School in Sewell, NJ in June 2021. Math classes that she had taken in High School included AP Calculus, AP Statistics, Honors Algebra II, Honors Geometry, and Honors Pre-Calculus. She has always been extremely interested in Math and Science and took AP Biology and AP Physics as well. She was part of many activities both in and outside of the school community. She was part of the National Honors Society, Science National Honors Society, Student Athletic Trainers Association, Chorus and Freshman Transition. Marissa is attending Rowan University, majoring in Bio-Medical Engineering. Before becoming a Mathnasium Instructor, Marissa invested the majority of her time in additional activities. She spent her extra time playing volleyball for a school team, a club team, and just for fun. She also loved being part of the music community at her school. She has been trained in piano since the age of 4 and has been a part of choirs for the school since 5th grade, and has composed several original pieces. The Mathnasium Method assists students with their individual educational needs and learning styles. Marissa believes that she continues to learn from each child she works with. She truly believes that this style of learning Math is more accessible to the growing mind. With the understanding that every child has unique struggles and abilities, successfully learning Math is within reach for everyone.

Pridhau Manohar

Instructor since 2021
PRIDHAU is currently a student at Rutgers University-New Brunswick, majoring in Computer Science and minoring in Mathematics. He graduated from Eastern Regional High School in Voorhees, NJ in 2019. At Eastern, Pridhau took Honors Geometry, Algebra II, Pre-Calculus, AP Physics and AP Calculus. At Rutgers, he has taken math classes such as Calculus II, III, Linear Algebra, and Elementary Differential Equations. Pridhau discovered his love for math in high school. As he started excelling in class, he began to find math fun. This led to him looking for complex math problems and puzzles in his spare time. He also took part in several extracurricular activities. He was most involved in the Robotics Club, where he got to apply his passion for math and computers. Pridhau also played the violin in the string orchestra, and he was a part of the French and Tri-M Music Honor Societies. In his free time, he likes to play video games, cook, and hang out with friends. Before becoming a Mathnasium instructor, Pridhau tutored several of his friends in their math courses. He enjoyed breaking down complex concepts in a simple way that makes sense. This is what drew him to Mathnasium. He believes that everybody has the ability to be good at math, and he feels that the Mathnasium method allows him to help students realize their potential in a fun and efficient way.

Samantha Fredericks

Instructor since 2022
SAM attended Rowan University, graduating with a Master’s Degree in Applied Mathematics in 2020. She was an Adjunct Professor at the Gloucester Campus of Rowan College of South Jersey, where she has taught Statistics, Algebra, and Trigonometry courses. In addition to the courses Sam taught, she is highly qualified in Calculus, Geometry, Linear Algebra, and various other mathematical topics. Samantha is a Math teacher at Overbrook High School. While working at Mathnasium, Sam is working towards becoming a certified High School teacher. The experience gained tutoring with the Mathnasium methods will benefit her students. Sam believes that most people do not enjoy math because they find it to be too complicated. She enjoys showing techniques that make solving problems easier. Once students realize that mathematical concepts build on themselves, then learning new topics becomes less stressful and more enjoyable. Outside of Mathnasium, Sam is an avid runner, who has completed many races including 5k, 10k, and even a half marathon. She is also an animal lover. Sam has three dogs, a cat, and a snake.

Ferdinand (Fred) Okoro

Instructor since 2022
FRED has B.S. and M.S. degrees in Physics and Electrical Engineering and has been teaching at community colleges and 4-year universities for over 30 years. Fred has taught a myriad of Mathematics courses from remedial to advanced mathematics. In addition, he has been a Chairperson of the Mathematics program at a community college. Fred has supervised full-time, part-time, and adjunct instructors of Mathematics for many years. Fred lives in Williamstown with his wife, 4 sons, and a grandson. He likes reading and watching international news and watching international soccer on weekends. Mathnasium of Washington Township is an excellent place where students are developing mathematical skills. As many parents are aware, mathematics is the academic foundation for other disciplines, especially in STEM fields. From his observation and experience, Fred believes that the students are very eager to learn and it is a joy to teach them. Students who come to this center can develop excellent mathematical skills that they will use in their elementary and high school education and beyond.

Emma Chu

Instructor since 2022
EMMA graduated from Washington Township High School. She has taken numerous math classes such as AP Calculus BC, AP Statistics, Honors Geometry, Honors Pre-Calculus, and Honors Algebra II. She has always been fascinated by the STEM field and hopes to pursue a career in Engineering. She was involved in school clubs and activities such as Student Council, National Honors Society, Tri-M Honors Society, Math Honors Society, Science National Honors Society, French National Honors Society, and English National Honors Society. Emma will be attending the University of Pennsylvania for the fall 2022 semester. She plans to major in Materials Science and Engineering. Before becoming a Mathnasium Instructor, Emma tutored high school students in Algebra, Pre-Calculus, and Geometry. She was also involved in winter and spring track and field. She has been playing the violin for 11 years and was enrolled in her school chorus and orchestra. She spends her free time hanging out with friends, going to the gym, and staying active. Emma believes that Mathnasium has a unique way of teaching and helps children envision math from different perspectives. The Mathnasium method has helped Emma discover valuable techniques for solving math in her own life and believes that they will help later on as she continues to tutor students of all ages.

John Salerno

Instructor since 2022
JOHN attended Rowan University, earning a Master’s Degree in Applied Probability and Statistics. He teaches mathematics at Atlantic Cape Community College, teaching courses ranging from introduction to arithmetic through differential equations. John is also a data engineer, using mathematical solutions to tackle real-world mental health problems. John has always had a passion for helping students succeed in both their personal and professional goals. His favorite teaching moment is when a mathematical concept “clicks” for a student. While John has only worked at Mathnasium for short time, he has enjoyed working with each student he has come across and learning new teaching techniques via the Mathnasium Method.

Harrison Weidner

Instructor since 2022
HARRISON graduated from West Deptford High School in 2018 where he graduated in the top 15% of his class. He knew he wanted to become a Mathematics teacher, so he enrolled at Rowan University in the fall of 2018 in an accelerated Mathematics-Education program. In May of 2022, Harrison graduated with his Bachelor’s Degree in Mathematics and will continue at Rowan to pursue his Master’s Degree in Education. He begins his student teaching in Fall 2022 at Kingsway High School. Harrison realized he loved helping people learn through inspirational teachers throughout his time in high school. While in marching band, the bowling team and golf team, and stage crew, he had many role models that made him want to become a teacher. His love for math only grew during his studies at college with professors who taught higher-level mathematics and made it easy to be understood. Harrison also works as a lifeguard, which he has been doing since the age of sixteen in high school. In his spare time, he loves to read, play video games, cook, and go camping. He has always enjoyed the outdoors, especially since he is an Eagle Scout. While Harrison has only worked at Mathnasium for a short time, he has begun to enjoy his experience as an instructor more and more each day. Getting to teach all different levels of math to a variety of students has only added to his experience with teaching and mathematics. When he begins his Student-Teaching this fall he will continue to work as an instructor and learn the Mathnasium ways.

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
Schedule Your Math Skills Assessment Today

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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