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.

Donni Marshall

Assistant Center Director
Donni is a college graduate with a Bachelor’s Degree in Business Administration from Louisiana Tech University. Donni lived in California and Louisiana before finally settling in Texas. Donni loves creativity and creating acrylic paintings.

Favorite Number: 626

Fun Fact:

Donni took both trigonometry/pre-cal and calculus at the same time during her senior year of high school.

Favorite Math Joke:

Why was the equal sign so humble? He knew he wasn’t > or < anyone else.

In five years, I will:

Be a successful business owner with a thriving business.

I love Mathnasium because:

It is a great way to have a positive impact on kids to help them become successful and educated adults in the future.

Thien Bui

Lead Instructor
Thien is a college student, planning and currently attends UTHSA. She is working towards her Bachelor’s degree in Medical Sciences and would like to become a doctor or a lab scientist. Thien is a food lover and she is up to try different cuisines!

Favorite Number: 9

Fun Fact:

I am Vietnamese! I can speak Vietnamese and English fluently. I want to practice my Korean and Mandarin more!

Favorite Math Joke:

What are ten things you can always count on? Your fingers.

In five years, I will:

Still be in university for my doctorate degree.

I love Mathnasium because:

I love helping people and I love kids! Mathnasium is a combination of both!

Kofi Bekoe

Instructor
Kofi just graduated from Wagner High School. He has lived in Texas for 7 years, and really likes the culture and people here. He likes to play basketball and video games. He says he is pretty much a normal guy.

Favorite Number: 7

Fun Fact:

I lived in Europe for 9 years.

Favorite Math Joke:

I guess the “7 ate (8) 9” one, a classic!

In five years, I will:

Be in college, probably pursuing a STEM degree (not sure yet).

I love Mathnasium because:

I enjoy teaching and interacting with the students and knowing that I can help them understand things that they don’t necessarily understand. It’s a great experience.

Daniel Chavez

Lead Instructor
Daniel is currently attending Texas State University and majoring in Wildlife Biology. Besides his love for animals, he likes drawing, making music, and learning advanced math.

Favorite Number: √2

Fun Fact:

I have gotten an A in all of my college math classes.

Favorite Math Joke:

Did you hear about the over-educated circle? It has 360 degrees!

In five years, I will be:

Contributing my efforts to preservation of marine life.

I love Mathnasium because:

Helping people learn to not fear math is a good cause.

Laney Stong

Lead Instructor
Laney is a sophomore at the University of Texas at Austin. She has lived in the area her entire life and loves the community. She used to participate in band in high school and is now attending UT Austin, pursuing an undergraduate degree in neuroscience. Laney online works on our @home platform.

Favorite Number: 217

Fun Fact:

I have been a Girl Scout for 12 years!

Favorite Math Joke:

Are monsters good at math? Not unless you Count Dracula!

In five years, I will:

Be finishing up my undergraduate degree!

I love Mathnasium because:

I love the environment of learning and helping kids to be more confident in their math skills! It’s amazing to see them progress and begin to believe in themselves.

Joseph Goffar

Instructor
Joseph is an undergraduate mechanical engineering student at UTSA. He’s a military brat who’s originally from Honolulu, but now calls Texas home. An avid video game player, 3D printing hobbyist, and Star Trek aficionado; Joseph is what professionals refer to as “a nerd.” Naturally, as a nerd, Joseph finds himself offended by such a Flanderized descriptor.

Favorite Number: 1015

Fun Fact:

Joseph, while tall, is very bad at basketball and will often resort to throwing with one hand while looking silly.

In five years:

I will be an overpaid desk junky doing CAD daily and using way too much paper.

I love Mathnasium because:

: It gives me a chance to work with a consistent schedule, not have an overly stressful job, and make some extra money to build up my investments.

Kristine Onejeme

Lead Instructor
Kristine is currently a high school student at Randolph and new to Texas. She has lived abroad her whole life with 12 years in Japan and 4 years in Guam. She aspires to join the medical field and volunteer for an international nonprofit emergency medical service organization. What makes her great with kids is her matching immature humor. Kristine started work here in June of 2023.

Favorite Number: 11

Fun Fact:

I’m learning 3 languages.

Favorite Math Joke:

Hey girl, you look like a 9/10, but I can be the 1 for you.

In five years

I will finally be happy, because I'll be working towards my degree and life's focus.

I love Mathnasium because:

the feeling of finally coming to an understanding of what a math classroom is trying to teach you is genuinely the most satisfying feeling and this center focuses on providing that.

Sofia Urbina

Instructor
Sofia is currently a sophomore at Northeast Lakeview College. She’s originally from Chicago and recently moved to Texas. She wants to be a pediatrician when she’s older.

Favorite Number: 715

Fun Fact:

I speak 2 languages but I’m working on speaking French as well fluently

In five years:

I will hopefully be on my second year of medical school

I love Mathnasium because:

It’s a nice environment for kids to have fun with math and it’s better for learning math than a regular classroom setting.

Tony Bui

Instructor
Tony is from Vietnam and moved to the US in 2019 when he was 12, right before his 13th birthday. Lived in Eastvale, California for a year and moved to San Antonio, Texas in the summer of 2020. I want to be a biomedical engineer, refining artificial limbs or organs.

Favorite Number: 808

Fun Fact:

I am fluent in Vietnamese and English but I want to learn as much languages as possible.

Favorite Math Joke:

“Why are you turning in a blank sheet of paper?” “Because all my answers are imaginary

In five years:

I will hopefully be happy and get my Bachelor degree in Biomechanical Engineering.

I love Mathnasium because:

I get to work with kids and show them the fun of math. And also saving money for college.

Emma Ryan

Instructor
Emma is a student at Theodore Roosevelt high school. She has lived in Texas her whole life. She wants to be either a chemical or biomedical engineer. Emma loves crocheting, sewing, and learning new crafts.

Favorite Number: 72

Fun Fact:

I have eight siblings, and almost have a 700 day streak on duolingo.

Favorite Math Joke:

Why was the math book sad? It has a lot of problems.

In five years:

I will be in college.

I love Mathnasium because:

I love math and I love helping people!

Mack Tully

Instructor
Mack is a senior at the University of Texas, San Antonio. He has lived in Texas for al his life but has been all around the United States. He is a Computer Science Major and wants to revolutionize cyber security.

Favorite Number: i

Fun Fact:

I am a blackbelt in karate and have been in it since I was 4.

Favorite Math Joke:

Why did the obtuse angle go to the beach? Because it was over 90 degrees.

In five years, I will:

Be a government agent for cyber security.

I love Mathnasium because:

Math is the backbone of so many things and I think any program that strives to help people understand and appreciate math is wonderful.

Huy Duong

Instructor
Huy is a senior at the School of Science and Technology. He was born in Vietnam and moved to the US when he was 7. He has lived in 3 states in his entire life: California, Ohio, and Texas. He wants to become a civil engineer like his dad, and he’s really interested in cars.

Favorite Number: 1

Fun Fact:

I really like boxing, fishing and playing pool in my free time.

Favorite Math Joke:

What is a math teacher’s favorite season? SUMmer.

In five years, I will:

Be studying in college to become a civil engineer.

I love Mathnasium because:

I want to help kids develop confidence in their math skills at school.

Mia Stong

Instructor
Mia is a junior at Samuel Clemens High School. She has lived in Texas her whole life. She wants to go to the University of Texas at Austin to major in Biology and enjoys reading, painting, and spending time around friends.

Favorite Number: 17

Fun Fact:

I have a sister and niece who live in Florida!

Favorite Math Joke:

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

In five years, I will:

be in college at UT in Austin.

I love Mathnasium because:

math is my favorite subject, and I love being able to help others!

Rolando Urbina

Instructor
Rolando is a junior at Wagner High school. He lived in Chicago before moving to Texas in 2022. He wants to attend UTSA to major in Architecture or Engineering. He enjoys running, biking, and being outdoors.

Favorite Number: 11

Fun Fact:

I run track and cross country.

Favorite Math Joke:

I have a scary math joke to tell, but I’m “2²” to tell it!

In five years, I will:

receive my Bachelor’s from College.

I love Mathnasium because:

It is a fun environment for kids to learn, and I wished I had access to Mathnasium as a kid.

Ethan Boutwell

Instructor
Ethan is a student at UTSA studying his 3rd year of computer science. He has lived in San Antonio his entire life and plans on moving to Dallas or Austin after graduation in order to pursue opportunities in technology.

Favorite Number: 3

Fun Fact:

In my free time I enjoy playing basketball and I’m also a movie lover.

Favorite Math Joke:

Never start a conversation with Pi. It’ll just go on forever

In five years, I will be:

be working to make a name for myself in tech and potentially living downtown in Dallas or Austin.

I love Mathnasium because:

I have a passion for helping others learn and I believe math is arguably the most important thing for a student to master.

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!

Explore Employment Opportunities