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.

Kendall Zickefoose

Assistant Center Director

Kendall attended Stevenson University for Math and Science Education, with an emphasis on 4th through 9th grade STEM. An avid connoisseur of snacks, one of her joys in life is Coca Cola! She also loves cats and all sorts of films and TV shows!

Kendall loves teaching math because math helps build everything! She loves that she gets to help others make sense of their world!

Her favorite subject to teach is from Prealgebra to algebra I because going from number sentences to expressions and equations is so fun and a big mile stone!

Favorite Math Joke: (Kendall and Matt have almost the same favorite math joke!)
How do you keep warm in a cold room? Go into the corner - it's always 90 Degrees!

Interesting Fact: Kendall played Basketball all the way through high school, and even coached for a short while!

Kristen Ellis

Lead Instructor

Kristen Ellis started geeking out on math at a young age and went on to major in mathematics in college. She has been a math educator for over 2.5 decades, teaching kids, teaching teachers, writing curriculum, running math clubs, and generally spreading math joy everywhere she goes.

Favorite Number: 24 (a beautifully composite abundant number)

Favorite Math Joke: Why is 6 afraid of 7? Because 7 “8” 9. (classic nerdy math joke)

Interesting Fact: Kristen ran in a Pi Race, which was 3.1415 miles on 03/14/15. She did not win the race, but won a chocolate pie for reciting the most digits of pi (over 100) in a fierce competition among many other mathletes.

Mariama McGee

Marketing Manager

Mariama attended UMBC for a major in Information Systems. During her free time, she enjoy designing graphics, baking, and watching the Great British Baking Show. Coffee Is Her Life and she doesn't want to spend a day without it.

She loves working at Mathnasium because she thinks every child deserves a chance to be taught in the way that is best for them. Math is used within most aspect of life and it does not have to be daunting and frustrating. Her favorite subject is algebra. She always found solving problems to be so much fun and exciting. There is so much joy in finding what x equals.

Favorite Math Joke: What did Zero say to Eight? Nice Belt!

Interesting fact: While studying abroad, I lived in three different countries.

Madison Alexander

Lead Instructor

Madi is a senior at Linganore High School with a love for anything science or literature. Her free time is spent with her nose in a new book or busying herself with a new art piece. She enjoys being in the presence of other people on top of learning about and trying new things everyday.

She enjoys teaching math because of its close ties in everyday life. Helping people make the connection from math to life outside the classroom is always a fulfilling experience. Madi enjoys teaching algebra 1 the most as it’s almost like a puzzle and is never not satisfying when solving for variables.

Favorite Math Joke: Why did 1/5 go to the masseuse? Because it was two-tenths!

Interesting Fact: Madi will never back down from learning a new instrument. Her favorite instrument (and longest learned) is the clarinet.

Cassidy Callahan

Lead Instructor

Cassidy is a recent Gettysburg College graduate with a math major and an Arab studies and chemistry double minor. She pole vaults for track and field and love painting and working out in her free time.

Cassidy loves seeing the kids faces light up when they get their lightbulb moments. She loves making math accessible and possible for everyone.

She enjoys all teaching algebra as it is a fun combination of all the strategies that have been practiced for years.

Favorite Math Joke: What don’t atheists do well with exponents? Because they don’t believe in higher powers.

Interesting Fact: Cassidy goes camping at national parks by herself.

Liz Hackley


Liz is a rising sophomore at Gettysburg College. She enjoys solving puzzles, drawing, sewing, and playing volleyball. She loves learning math, and teaching allows her to share that experience of learning with others. Her favorite subjects to teach are algebra I & II, because they cover so many skills that are essential for higher levels of math. She remembers struggling through parts of these classes, and how rewarding it was to finally understand an idea.

Favorite Math Joke: Parallel lines have so much in common. Too bad they’ll never meet!

Interesting Fact: I like riding roller coasters, the higher and faster the better.

Braden Cordrey


Braden is an incoming junior at South Carroll High School. He love sports, especially baseball and I aspire to play baseball at a division one school. While playing baseball in college he also wants to earn a degree in software engineering.

His favorite part of teaching math is seeing people progress because "math is one of those things where once it clicks it can lead you to many other skills". His favorite subject is algebra because it is a base for majority of things you will be doing mathematically.

Favorite Math Joke: Parallel lines have so much in common … It’s a shame they’ll never meet!

Interesting Fact: Braden has never travelled outside the United States.

Visu Vasa


Visu is one of our Mathnasium instrcutors. He is programmer on my robotics team... so he works with math all of the time and loves it!

Teaching math is a lot of fun for him because it’s great to watch as students slowly start to understand and being able to apply concepts that they were once unable to figure out.

His favorite subject is algebra (1 or 2) because they’re really important to building a foundation into calculus and higher level math.

Favorite Math Joke: What did one math workbook say to the other book? Don’t bother me, I have my own problems.

Interesting fact: Visu has done a ton of cool stuff with computers, including hardmodding things like memory chips!

Riona Magesh


Riona is a junior at Oakdale High School. She loves traveling, and hopes to travel to almost every country in the world at some point in her life. She also plays piano and loves listening to music!

In general, she just loves teaching. As math is such a core concept, she enjoys helping those who need it. Her favorite topic to teach is Algebra 1, because it is foundational to learning.

Favorite Math Joke: Why are obtuse rectangles so depressed? Because they’re never right.

Interesting Fact: Riona likes binge watching movies on Netflix.

Ethan Sanders


My names Ethan, I am currently a junior at South Carroll High. I love to lift weights and I love school. I like challenging myself and learning new things.

Ethan wants to teach math because he's always loved the concreteness of math and problem solving. He finds math to be very fun to explain to people and loves helping people understand things. He loves teaching word problems the most because they make students think. They are not just a problem you solve with a certain formula. Word problems force you to think about it more and you get to figure out more things on your own.

Favorite Math Joke: Do you know why 7 ate 9? because your supposed to eat three squared meals a day.

Interesting Fact: I compete in powerlifting and I am going to nationals this year.

Clayton Stull


Clayton is a student at Linganore high and loves the arts. In his free time he acts, plays the guitar, and babysits. He plans to major in psychology and hopefully own a studio in the future where he can make and sell his ceramics pieces.

Clay loves teaching math because he understands how difficult it can be to grasp the subject, so he aspires to create a positive environment where kids can enjoy learning. His favorite grade levels to teach are elementary school! He loves working with younger kids and finding ways to engage them in the subject during one of their first experiences with math.

Favorite Math Joke: Did you hear about the mathematician who’s afraid of negative numbers? He’ll stop at nothing to avoid them!

Interesting Fact: His picture is from Linganore's production of the play Puffs, in which he played the narrator!

Aisiri Prasad


Aisiri is a junior at Linganore High. In her free time, she loves reading, playing ping pong, and watching Disney TV shows. Her passion is for art, especially oil painting and therefore she's hoping to double major in Computer Science and Studio Art!

She loves teaching math because it's rewarding to see students overcome a challenge that they have been working so hard on. Her favorite subject to teach is Algebra or Pre Calculus because it contains all the fundamentals math has to offer. Along with this, these courses are challenging and are satisfying when overcame.

Favorite Math Joke: What shape do you always have to be careful of? A trap-azoid!

Interesting Fact: Since the age of 9, Aisiri has been training in Bharatanatyam, an Indian Classical Dance.

Lucy Arnold


Lucy is a junior at Linganore High School in Frederick County, MD. In her free time, she likes to play the guitar, ski, and go outdoors.

Lucy loves teaching math as she loves to be able to explain and connect concepts to one another, and to see behind the scenes of a problem! Lucy’s favorite subject to teach is Algebra, as she likes to work with functions, and be able to see a visual representation of the work she is doing.

Favorite Math Joke: Why was 6 scared of 7? Because 7 8 9!

Interesting Fact: Lucy hopes to study architecture in college.

Morgan Smith


Morgan is currently a student at Linganore high school while also taking classes at Frederick Community College. She love art, reading, and music, and hopes to become a forensic biochemist when I graduate.

Morgan loves teaching math because of its simplicity. She loves that there is only one answer and that you are either right or wrong, but also that there are many correct ways to reach the same solution. Her favorite subject to teach is algebra because it is the basis for all other forms of mathematics.

Favorite Math Joke: Why did the obtuse angle jump in the pool? Because it was over 90 degrees

Interesting Fact: I have my black belt in budo taijitsu

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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