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 secondary mathematics throughout college. She has experience working for McGraw-Hill and Star House -a nonprofit organization helping youth experiencing homelessness right here in Columbus. Nicole has always had a love for the subject and wishes to show others that math can be useful 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 fourth-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!

Jane, Instructor

Jane worked 27 years in state schools and 10 years in public schools teaching secondary math and working as a school counselor. She obtained a Bachelors Degree in Math Education and a Master's Degree in School Counseling. Jane is a wife, mother, and grandmother and enjoys doing puzzles in her free time!


Hobby : Puzzles!

Favorite Pi(e): Cherry Pie

Favorite Holiday: Christmas


Brandon, Lead 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

Amita, Lead Instructor
Amita recieved a degree in Finance and Human Resources. She has experience as an auditor for three years in a chartered accountancy firm and has worked in a data recognition corporation as a test scorer. Her goal is to idetnify each student's potential and capitalize it. Her manta is 'Clear Conepts, Accuracy, and Efficiency." Amita's favorite past time activities include painting, travelling, and playing badminton!


Mike Sims, Instructor

Mike is a graduate of Michigan State University where he earned his Bachelors and Masters degree in History, with a minor in math.  He then got his teaching certification and taught high school math in Michigan and Illinois.  He has been working at Mathnasium of Powell for three years in a variety of roles.  He enjoys reading science fiction and watching scifi and classic movies.

Favorite Number:  0, because it is such a troublemaker.

Fun fact:  As a child I saw the launch of Apollo 8.

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 varsity 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



Ashwin, Volunteer


Ashwin Rajkumar is a senior at Olentangy Orange High School and he is currently taking AP Calculus BC. Ashwin is currently the Captain of Science Olympiad and he is also a part of 3 different National Honor Societies.

In his free time Ashwin enjoys playing guitar and chess. Ashwin is also the founder and CEO of The Be W.I.S.E Initiative a Non-profit Organization geared towards helping elementary school girls gain and passion and a sense of representation in the field of Science and Engineering.

In the coming years he plans to obtain a Ph.D. in Aerospace Engineering and he plans to specialize in the area of Thermodynamics and Fluid Mechanics.


Hobbies: Chess and Guitar

Favorite Pi(e): My taste palette is only accustomed to Cake

Favorite Holiday: Christmas because of all the joy and cheer that everyone expresses






Isha, Instructor


Isha is currently a junior at Olentangy High School and taking

AP Calculus AB. Isha is part of TangyThon, a club dedicated to

raising money and awareness for children with pediatric cancer,

as well as the National Honors Society. Isha is also a volunteer

at Riverside Hospital and hopes to pursue a career in medicine!

In her free time she enjoys relaxing with family and friends. 


Hobby: Tennis 

Favorite Pi(e): Pecan pie

Favorite Holiday: Christmas



 Isabella, Volunteer

Isabella is currently a sophomore at Olentangy Berlin High School.
She finds enjoyment in mathematics- she has two younger sisters and she often helps them with math.
She also enjoys taking AP science classes.
Isabella’s been a dancer for twelve years and is a school athlete for track and field. She also is part of
service club and indoor track. In her free time, she plays basketball and the piano.

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.