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.

Libby Lossing

Director of Marketing
Libby brings a dynamic blend of leadership, education, and community spirit to her roles as Director of Marketing at Mathnasium.

Prior to joining the Mathnasium team full time, Libby attended the University of California, Los Angeles, where she was the Captain of the UCLA Spirit Squad and traveled the country as the school’s mascot. This multifaceted experience allows her to connect with a wide range of people and fosters a collaborative and engaging atmosphere in her work. In addition to her bachelor's degree from UCLA, Libby holds a certificate in School Management and Leadership from the prestigious Harvard School of Education and Business School.

Some of Libby’s exceptional achievements include:

  • Best Overall Marketing in North America: Libby was recognized as the first ever recipient of this award because of her outstanding community and school engagement, media integrations with local news, and overall ambassadorship for the brand.
  • Best Assessment Improvement Award: In a franchise of over 1,000 learning centers, Libby’s location showed the best educational results for students overall.
  • Local Business Person of the Year: An award voted on by local business owners based on the value of the person’s contributions to their network.
A key member of the Mathnasium team since 2017, Libby is dedicated to creating a positive and enriching learning environment for all students.

Youngkun Weiss

Director of Operations

Karen Lossing

Executive Director

Evan Lossing

Director of Human Resources

Steven Lossing

Executive Director

Makenzie

Instructor

Hello, my name is Makenzie Sobieski! While looking at jobs for over the summer, I remembered seeing Mathnasium near my local high school, Columbine. I thought, “How cool would it be to help kids be as passionate about math as I am”. I have always been better at Math than English, so I decided this job would be a perfect fit for me. After shadowing other Mathnasium employees, I realized how awesome the atmosphere and culture at Mathnasium was and knew I had to take advantage of the opportunity. I think my favorite part about being an instructor is seeing the vast improvement in not only kids’ math skills, but also their love for math. Math can be a very tricky subject, but once understood, it is sure to be a favorite.

Favorite Number: My favorite number is 7 because it has been my softball number for my entire 10-year career and it is also my bunny, Phoebe’s, birthday.

Favorite Math Joke: Question: Why did the obtuse angle go to the beach?

Answer: Because it was over 90 degrees.

In 5 years, I will be . . . Graduated from the Colorado School of Mines with a Civil or Biomedical Engineering degree.

Fun Fact: I’m an identical twin.

Hobbies: Competitive softball, hiking and traveling with my family, and spending time outdoors.

Hank Jarboe

Instructor

Hi! My name is Hank Jarboe. I've been teaching for the greater part of ten years, whether it be in a public school setting, tutoring one-on-one or even at the skatepark. I truly believe that most problems can be solved through education, understanding and learning, and one of the tenets of being a great educator is being a good learner. I love teaching, but my personal daily miracle is learning from my students.

Favorite Number: My favorite number is 5! For some reason, I associate 5 with the color green, which is also my favorite color. I also love 12, because it's so divisible!

Fav Math Joke: Mixing French and math, my favorite math joke involves a French cat named Un Deux Trois (or One Two Three in English). Un Deux Trois wants to sail across the English Channel, but his boat is no good. Unfortunately, the Un Deux Trois cat sank (which is a pun for counting to 5 in French: Un Deux Trois Quatre Cinq)

Fun Fact: After years skateboarding as a kid (and not being very good at it), I've tried picking it back up at 30. Fortunately, I've only suffered one broken bone since then, but I've made tremendous strides in tricks and my own personal confidence, on or off the board. I also love to help teach kids while skating.

Zach

Assistant Center Director

Hello, my name is Zachary and I have been an instructor at Mathnasium of Littleton for 7 years, all the way back to when I was just 15! Besides my passionate love for mathematics & teaching the subject, I enjoy many things. Throughout the year, I play Ultimate Frisbee. In addition, I love to travel, whether it be to Europe, Mexico, Washington D.C., Moab or Glenwood Springs. I traveled to Mexico five years ago to help with a Habitat for Humanity project. In my free time, I enjoy solving logic puzzles, like Sudokus or one of my Rubik's Cubes. I've always loved working with kids and have always enjoyed math so sharing my knowledge with students at Mathnasium is a perfect fit.

Favorite Number:  My favorite number is 1729. There was a man named Srinivasa Ramanujan who was a famous mathematician in the early 20th century. Despite growing up in India and having very limited access to the mathematical knowledge of the time, he taught himself and was sought out by English mathematicians for his work in all fields of math. A colleague and friend of his, G.H. Hardy, visited Srinivasa in the hospital and mentioned that his taxicab number, 1729, was an unusually dull number. Srinivasa remarked that in fact, it was not. 1729 is the smallest number that can be written as the sum of two cubes in two different ways, 10^3+9^3 and 12^3+1^3. Nowadays, 1729 is known as a taxicab number for this exact reason. Additionally, the sum of the digits, 19, times its reverse, 91, gives you back 1729. These types of interesting facts that you can find for every number show the true beauty in mathematics.

Favorite Math Joke: Why do mathematicians always get Christmas and Halloween confused? Because Oct 31 = Dec 25. In base 8 (Oct), the number 31 is the same as the number 25 in base 10 (Dec or Decimal).

Fun Fact: People at school and in the Ultimate Frisbee community call me Steve due to the fact that there were two people named Zach on our high school frisbee team. I received the name Steve and the nickname has stuck ever since.

What is your dream? Living in Spain with an enjoyable career and becoming fluent in Spanish.

Michael

Lead Instructor

Hello, my name is Michael. I am a graduate of the University of Colorado in Colorado Springs with a bachelors in mathematics. I have been a college tutor and have worked in an elementary school for five years. I have worked at Mathnasium for 3 years now. I wanted to work at Mathnasium because I enjoy helping people out with concepts and topics that are causing them stress or difficulty. The atmosphere and the vibe Mathnasium gave off was fun and inviting, so naturally I wanted to be a part of the team. I also enjoy working and interacting with kids. I remember tutoring and holding study sessions for a majority of my college algebra class. The experience was fun, plus it was a good feeling to be able to help my fellow classmates not be super stressed out about math. The teacher noticed I was doing these things and after the class was finished, helped me get a job as a tutor at the school's learning center. I hope to use my talents and personality in order to help students be the best they can be. In addition, I want to help them build confidence, not only in math, but in their everyday life as well.

Favorite Number and Why: ​18 because it's cool (and it's my birthday)

Favorite Math Joke: Are monsters good at math? Not unless you Count Dracula.

In 5 years I will be . . . . teaching math.

Fun Fact: I used to play video games competitively.

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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