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.

Melanie Grandelli

Melanie graduated from college with a Bachelor's of Science degree in math education. Since then she has taught not only math, but most other subjects as well, in private school, boarding school, public school, and her family's homeschool. She enjoys finding different ways to explain math concepts to people, whether they be kids encountering the problems for the first time or adults who never really understood the ideas when they were in school. Outside of teaching, Melanie likes to read, garden, bird watch, ski, shoot squirrels, dirt bike, and listen to classical music.

Sherry Moyers

Sherry graduated from Georgetown University with a B.S. in Russian language and a minor in Linguistics. She then attended George Mason University and studied chemistry, organic chemistry, and microbiology. She worked at a genetics lab before settling down and raising four children, whom she homeschooled from kindergarten through 12th grade. In addition to loving languages and sciences, Sherry is also a musician. She has recorded two bluegrass gospel albums and collects musical instruments. Some of her other hobbies include beekeeping and bread baking. Sherry values education, and believes that we should challenge ourselves to keep learning all our lives - a solid foundation in mathematics is an essential part of that education. Sherry likes working one on one with young people and is glad to be a part of the Mathnasium team.

Kanoa Ratliff

Kanoa has a B.S. in architecture with a minor in Spanish from the University of Virginia. After graduating from college, she worked as a substitute teacher where she frequently taught math and Spanish classes. She also honed her practical math skills while working in a picture framing store and in the construction and drafting department of a national deck builder. Additionally, Kanoa has spent 17 years homeschooling her two sons from Kindergarten through high school. One son is currently finishing a degree in mechanical engineering at VCU and the other is nearly finished with high school. For the past three years she has tutored homeschool students in math at a small co-op, where she has enjoyed helping students discover the ways that they best learn math. Kanoa also volunteers with many local community organizations. She lives with her husband and sons on 11 acres in southern Fauquier in a home that she and her husband designed and built. She loves to travel with her family and visit amazing feats of architecture such as the Sears Tower in Chicago, the Space Needle in Seattle, the Gateway Arch in St. Louis, the CN Tower in Toronto, the Confederation Bridge on Prince Edward Island, the Alhambra in Spain, and many others too numerous to mention. Other hobbies include reading, photography, weightlifting; and hiking, kayaking, and biking with her family.

Ffiona Coulson

Ffiona is a student at Virginia Tech, studying psychology and neuroscience with a minor in Spanish. She has always enjoyed the reliability of math (her favorite class being statistics) and discovered her passion for teaching others in helping her two younger brothers with their homework growing up. Ffiona loves being a part of the Mathnasium team because it allows her to explore that passion further while helping students discover their own enjoyment of math.

Max Dubnowski

Max is a student who attends both Mountain Vista Governor's School and Liberty High School and tires himself out trying to explain people that yes, he attends two schools during the year. For some odd reason, he wants to study the fundamental parts of matter as his career in some big, fancy lab somewhere really cool. If he is not exploring different fields of science in his free time, then Max is solving Rubik's cubes, listening to good music, or using his telescope to perform different experiments in astronomy. But the oddest thing about him is that he will play chess with anyone who wants to play with him at any time!

Catherine Henkel

Catherine is a senior at Kettle Run High School. She has always liked math and working out challenging problems. Her favorite subject in math is Calculus, with Algebra in a close second. Other than math, she enjoys French and Psychology. After graduating from high school, Catherine plans to go to college to study Industrial/Organizational Psychology. In her spare time, Catherine likes to read and watch movies, as well as spend time with her family and friends.

Alex Lichty

Alex is a graduate of both Liberty High School and Mountain Vista Governor's School. Math has always been a constant in Alex's school career, with her favorite class being Trigonometry. One of Alex's favorite things about Mathnasium is learning all the different strategies to solve problems! When Alex isn't doing math, you can find her playing field hockey, reading a good book, or volunteering.

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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Washington, DC 20009
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