Mathnasium 9866 Brewster Lane, Powell OH 43065 (740) 236-9100

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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. 


Ravi Kopuri, Executive Director

Before opening the 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 Powell community to understand maths by teaching it in a 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.




Brenden Hill, Lead Instructor

Brenden is a student at The Ohio State University researching artificial intelligence and its applications.  He loves reading, playing games, and creating things such as stories, puzzles, and games.  He has been working at Mathnasium since highschool, and has loved teaching since long before then.
Math Joke: "Did you know that [insert number here]% of statistics are made up on the spot?"
Favorite Number: 1.618, the golden ratio is nature's favorite number, why not mine?
Fun Fact: Having two left feet doesn't mean I can't dance, only that I shouldn't


Brad McCord, Instructor  


Brad is a student at The Ohio State University, where his passion for teaching has lead him to study to become a high school professor. He enjoys many things, like video games, snowboarding, soccer, and of course, math! He also has an adorable pet turtle and loves all kinds of animals.

Math joke:  Number lines have always been reliable for me. I guess you could say I could always count on them!

Favorite Number:  2, because it is always an easy number to see in math. 1/2? half, 2x? double. EASY. Also, it was my number for my soccer team!

Fun Fact:  When the weather is nice, I ride my motorcycle! 

Ryann Joseph, Instructor 

Ryann is a student at Olentangy Liberty High School. She enjoys challenging herself in school, taking various honors and AP courses. She is also a member of the school’s marching band, basketball cheerleading squad, and girl’s lacrosse team. Ryann has been helping her friends and peers with math since kindergarten. 

Math joke: I’ll do algebra, I’ll do trig, and I’ll even do statistics, but graphing is where I draw the line!

Favorite number: 3, because the divisibility rule is really cool!

Fun fact: Ryann collects Snapple cap facts.




Ethan, Instructor

Ethan is a freshmen at The Ohio State University studying Computer Science and Engineering. He enjoys programming, art, and jogging in his free time. His goal to show all students that they can become good at anything, including math!


Hobby: Art, Zelda Games, Jogging
Preferred Pi(e): Pumpkin
Best Holiday: Halloween, spooky time is best time






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.


 Alexa Pyun, Instructor

Alexa Pyun is in Olentangy Liberty High School's class of 2021. She is in marching band, choir, and track. She is a former mathnasium student who attended for two years and then became an instructor her sophomore year. In the future she hopes to pursue a career in the medical field majoring in biomed. She also plans to minor in music through piano, trumpet, and vocals.

Math Joke: Why do plant's hate math? ... Because it gives them square roots!

Favorite Number: 7 because it was the first set of multiplication table I learned and has always been my lucky number.

Fun Fact: Sometimes bees sting other bees.


Sarthak Mohanty, Instructor

Sarthak Mohanty is a junior at Olentangy LIberty High School.  He has a packed schedule, is a member of Science Olympiad, and plays Taekwondo and tennis.   He has great ambition, and shows this by becoming competent at everything he attempts.  He does not know what he will apply to major in, but he is considering neurosurgery and business analytics.

Math Joke:  Unlike the rest of my coworkers, I'm not the best at math.  In fact, I dislike negative numbers so much I stop at nothing to avoid them.

Favorite Number: 13, because it's nobody else's favorite number

Fun Fact: "e.g." and "i.e." are not interchangeable.  e.g means "for example", while i.e. means "in other words".


Natalie Zachariah, Instructor

Natalie is a senior at Olentangy Liberty High School. She has been learning German for 5 years and now is the leader of both German Club and German Honors Society. She has always had a passion for teaching , whether it be showing her brother how to tie his shoes, or explaining a calculus question to a peer. Natalie is looking to apply to a number of colleges and comajor in biological engineering and business.


Math Joke: What did the zero say to the eight? Nice Belt ;)

Favorite Number: 18 because it is the day of my birthday

Fun Fact: It costs 6 cents to leave a light on for 24 hrs.



Daniel Boyea, Instructor

Daniel is a student at Dublin Jerome High School and takes classes at OSU through the academy program. He plays oboe, piano, a little clarinet, composes in his free time, and likes to bake. He plans to double major in physics and math with a minor in music. 

Math Joke: Don't forget to write the x in sin x. That would be a sin!

Favorite Number: 11 because its easy to multiply and has a fun divisibility rule in any base. 

Fun Fact: Think of any whole number. If you look far enough, it will appear in the decimal expansion of pi.



 Sindhu Sharma, Instructor

Sindhu is a junior at Olentangy Liberty High School. She enjoys challenging herself in many rigorous courses in school, while also being involved in many clubs and activities, including Student Council, Service Club, and Active Minds. She is also a long and high jumper on her track and field team. Sindhu enjoys working with kids, as she has tutored in math, essay-writing skills, and spelling. In her free time, she loves to sing and play guitar. She also loves playing with her dog, Chief.

Math joke: Why don't calculus majors ever throw houseparties? They don't want people to drink and derive!

Favorite number: 25, because it's a perfect square!

Fun fact: Sindhu has played guitar for 10 years.  

Smaran Ramidi, Instructor

Smaran is in the class of 2021 at Olentangy Liberty High School. He is an officer for the school's student council, a member of the marching band, and winter drumline. He is also a part of the school's diversity club which he is in line to become copresidents of with his best friend Noor. He is hoping to go to Washington D.C. for college to study political science and foreign relations.

Math Joke: Why couldn't the angle get a loan? It's parents wouldn't cosine.

Favorite Number: 21 because it's the day of my birthday

Fun fact: I share a birthday with my sister even though we're 3 years apart!



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 Powell 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.




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