Mathnasium 82 Meadow Park Avenue, Lewis Center OH 43035 (740) 236-9191

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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:



Larry Martinek, Chief Instructional Officer, Developer of Mathnasium Program

Larry has spent his entire career finding a better way to teach math. From the 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 educational materials designed to help students and educators 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, He is a valuable asset we can call on to ask about particular students' scenarios for guidance and advice. This has helped to make visits more productive and enjoyable for many of our students. 

Nicole Kappeler, Center Director

Nicole recently graduated from The Ohio State University, with a B.S. in Education. She found her love of teaching while tutoring mathematics throughout college. Nicole has always had a love for the subject and wishes to show others that math can be fun to learn even if one doesn't plan to use it in his/her career.
Hobby: Visiting National Parks
Favorite Pi(e):  Banana Cream Pie
Favorite Holiday: New Years Eve


Nick, Lead Instructor

Nick McCord is a third-year undergraduate student at The Ohio State University. He is currently dual majoring in physics and mathematics with the hope of becoming a physicist in the future. He hopes to spark a deep understanding of math for each student at the Mathnasium learning center.


Hobby:  Playing video games

Favorite Pi(e):  3.14159265358979

Favorite Holiday:  Christmas, because I like the cold and snow

Kaili, Instructor

Kaili is in the class of 2021 at Olentangy Orange High School. After successfully earning the top score on the 2019 AP Calculus AB exam, she is currently taking AP Calculus BC. At school, her favorite extracurricular activities include Science Olympiad, Math Club, and Programming Team, and she has won many awards in these clubs. Last school year, she competed in the Ohio Science Olympiad State Tournament and at the 2019 MIT Science Olympiad Invitational. She hopes to pursue both of her passions, math and computer science, in the future. She also enjoys teaching and is interested in guiding students to an understanding and appreciation of math.


Hobby: watching 3blue1brown videos


Favorite Pi(e): I’m more of a cake person.


Favorite Holiday: Christmas!

Ty, Instructor

Ty is a graduate of Ohio State University with a B.S. in theoretical mathematics.   While at Ohio State, he was recognized by the College of Arts and Science’s   Dean’s List multiple times. In addition to instructing at Mathnasium for the past   two years, Ty has had experience working with children ages 5-18 as a swim   coach for Spring Mill Country Club in Ivyland, PA. He also has outside experience   in mathematics tutoring, serving Ohio State students enrolled in all levels of   mathematics courses ranging from entry level algebra to high level calculus.   

 Math Joke: My first statistics course taught me that correlation does not imply   causation. Then again, maybe it didn’t.

 Favorite Number: 17. The day of the month I was born.

 Fun Fact: I took three years of American Sign Language.

Brandon, Instructor

Brandon Sipe is a third-year undergraduate, who is majoring in mathematics at The Ohio State University. He plans to go on to get his Master’s in mathematics education and eventually teach high school students. He hopes to spread his love for math and share the beauty of it with all of his students, and he wants to promote a healthy desire for learning in all situations.

Hobby: Math! And games (video, role-playing, board)
Favorite Pi(e): Chocolate Pudding/French Silk
Favorite Holiday: Thanksgiving

Kelsey, Instructor

Kelsey Hill is a third-year engineering student at The Ohio State University in the biomedical discipline. She attended Olentangy High School where she was a 2-year captain of the girl’s soccer team and graduated in 2016. She enjoys helping students understand math and likes to work with kids. Kelsey has an upbeat personality to keep the kids engaged and having fun through jokes and funny comments. 


Hobby: Taking my dog to the dog park to swim

Favorite Pi(e): Pumpkin pie

Favorite Holiday: Christmas, because of how excited and happy everyone is. My aunt especially loved Christmas and made it such a special time for us as kids.

Marshall, Instructor

Marshall Grady is a third-year undergraduate student at The Ohio State University earning his Bachelor’s in Computer Engineering with a minor in Philosophy. He participates in a Green Engineering Scholars program as well as Ohio State’s rocketry team, Buckeye Space Launch Initiative.


Hobby: Playing video games

Favorite Pi(e): Boston Cream Pie 

Favorite Holiday: Christmas

Soham, Instructor

Soham is a sophomore at Thomas Worthington High School, who is currently taking AP Calculus BC. He has competed in many math competitions and won many honors over the past few years. He finished 2nd at the state MathCounts competition and represented Ohio at the national MathCounts competition. In the past year, he finished in 2nd place at the statewide OCTM competition, participated in the national level AIME competition, and won 1st place at the statewide OML competition with a perfect score. Soham is interested in helping other kids understand math in a way that makes sense. He loves to play sports and video games in his free time.


Hobby: Video games and sports

Favorite Pi(e): Apple pie

Favorite Holiday: Christmas

Praharna, Instructor

Praharna currently a sophomore at Olentangy High School taking AP Calculus AB. She loves math, science, and music. She plays piano, viola, and is a huge Potterhead!! She is a member of Science Olympiad and HOSA, hoping to one day pursue a career in the medical field.


Hobbies: Reading, Playing Piano

Favorite Pi(e): I prefer Cheesecake, food of the Gods!

Favorite Holiday: Christmas, because everyone is so happy


Veronica, Instructor

Veronica Leslie is a fourth year undergraduate student at The Ohio State University, majoring in theoretical mathematics. She has been a tutor for about a year in different locations throughout Columbus. She hopes to engage with students and leave a meaningful impact on each child in order to promote the importance of math and make it an enjoyable subject to learn. 


Hobby: Playing my ukelele or watching volleyball

Favorite Pi(e): Apple pie

Favorite Holiday: Christmas

Janna, Instructor


Janna is currently a junior at Olentangy Berlin High School and taking AP Calculus AB. Janna found her love of helping others as an academic assist mentor. She is a varisty tennis player and is also involved in her Class Cabinet, Astronomy Club, and  the National Honors Society!


Hobbies: Tennis and Piano

Favorite Pi(e): Fruit Tarts!

Favorite Holiday: New Years



 Viren, Instructor

Viren is currently a senior at Olentangy Liberty High School, where he is taking many different AP courses. He has taken many math courses, including AP Calculus AB. He is now taking AP Statistics and AP Calculus BC. He is involved in many school activities, and is a member of the Model United Nations Club and Environmental Club. Viren enjoys playing and watching sports in his free time, such as football and basketball.


Hobby: Hanging out with friends & family and playing basketball

Favorite Pi(e): Pumpkin pie

Favorite Holiday: Christmas



CenterDirectorSatya Yarramsetty, Director of Operations

Before opening Mathnasium center, Satya worked as a college lecturer teaching engineering students in India, specializing in Civil Engineering. He has an MBA from Ohio University and an M.Tech in Civil Engineering from prestigious Anna University, India. Satya is enthusiastic about helping every child in the Lewis Center community to understand Math by teaching it in the way that makes sense to them. He has taught and tutored children of all ages, and he is committed to bringing the Mathnasium Method to the children in the community. Married with two kids, Satya also volunteers at Mid-Ohio Food Bank, Local Churches and Temples, Shelter for Homeless, and Olentangy Local Schools.




Ravi Kopuri, Executive Director

Before opening Mathnasium center, Ravi instructed Math and Science to kids of all ages. He has an MBA from Fisher College of business, Ohio State University and a B.Tech in Mechanical Engineering from prestigious JNTU University, India. Ravi is enthusiastic about helping every child in the Lewis Center community to understand math by teaching it in the way that makes sense to them. He has tutored children of all ages, and he is committed to bringing the Mathnasium Method to the children in the community. Married with two kids, Ravi also volunteers at Mid-Ohio Food Bank, Shelter for Homeless, and Local Schools.





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The best way to see if we are a good fit for your child’s needs is to visit our center, meet the instructors and get a Complimentary Math Skills Assessment.