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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:


Dori Sousa, Owner

With a Master's degree in Education from Nova Southestern University in Fort Lauderdale, Florida and over 30 years of teaching experience in public and private schools, Dori is committed to helping children reach their full potential. Mathnasium's ways teach strategies for life and positive results are reflected in all areas of the curriculum.  Dori believes that when given the proper instruction and opportunities, any student can succeed in math.




"A lot of people are afraid of studying mathematics in spite of their capacities.  My aim is to make people enjoy learning mathematics because mathematics is everywhere."

- Anonymous

Mikey Franco, Center Director 

Mikey is a student at Kennesaw State University studying Public Relations with a minor in professional sales. He is very involved on campus and in the community. He currently holds campus relations director for a philanthropy called KSU Miracle who support Children’s Healthcare of Atlanta. He also leads a High School small group at Inside Out through Woodstock City Church. Business and experience driven, he has built a resume worthy of challenging anything put in front of him. He enjoys working at Mathnasium because of the family environment. He says he has always been good at math but will not lie and say he enjoyed it growing up. Mathnasium has found a way to make math not a weight on your shoulders but instead a talent you can possess.  



"Those who say I can, and those who say I can't, are both usually right" 

-Will Smith

Amber Johnson, Instructor

Amber is a current student at Kennesaw State University. She is pursuing a degree in Middle Grades Education with concentrations in math and reading.  When she is not studying or working at Mathnasium, she is volunteering at her church in both the middle school and high school youth groups.  Her favorite part of working at Mathnasium is watching the students learning and growing their math skills.

"I have no special talent.  I am only passionately curious."

- Albert Einstein


Skyra Loche, Instructor

Previously a Mathnasium student, Skyra is currently a sophomore at Emory University. She is on track for a double major in Sociology and Spanish and intends to continue her education with law school in the future. Skyra loves interacting with Mathnasium students and witnessing their embracement of math concepts. Outside of college and Mathnasium, she also enjoys to dance and create art.


"I touch the future. I teach."

- Christa McAuliffe

Katie Bishop, Instructor

Katie is a senior at Etowah High School. She is an excellent student, and has a love for math and science.  She is very involved in her school and community as she is on math team, national honors society, beta club, school council, secretary for her class for student government, and national honors society. She enjoys volunteering in her free time. 


"Hard work beats talent when talent fails to work hard."

- Kevin Durant

Brooke Lancaster, Instructor

Brooke is a senior at Etowah High School. She plays trombone and is very involved in her school’s band. Brooke has been a part of her school’s math team since freshmen year. She is delighted to be able to share her love for math with the students at Mathnasium. After high school, she is planning to pursue a degree in Civil Engineering. In her free time, she likes to attend concerts and hang out with her friends.

Kennedy Pulliam, Instructor

Kennedy is a senior at Etowah High School where she has discovered a flair for math. She enjoys helping the students at Mathnasium improve their math skills. At Etowah she is a student athletic training aide, as well as an intern to the Head Athletic Trainer. She loves working with children, and hopes to one day become a pediatrician. 






Garrett Roberds, Instructor

Garrett Roberds has been an instructor at Mathnasium since March 2015. For Garrett, math has always been a major part in his life. In fact, he says "I speak better Math than I do English" and hopes to impart this same understanding of math to the students at Mathnasium. Garrett graduated from the University of North Georgia with a major in Physics and a minor in Math. Before coming to Mathnasium, he was part of a yard work business as well as the banquet staff for Flat Creek Golf Club. In March, Garrett commissioned into the Air Force and is now awaiting to go to school for his job as a Space Operations Officer for the Mississippi Air National Guard. 


 Kage Bargeron, Instructor

Kage loved Math from a very young age and as time went by that love only grew stronger. He is a senior at Etowah Highschool where he is an active member of his school's math teamas well as an officer in the Math Honor Society (Mu Alpha Theta). He is also involved with the local church at Woodstock City as a small group leader for first graders. In five years Kage hopes to be graduating from Georgia Tech. Kage enjoys working at mathnsium because "It allows students to learn unique paths to solving any problem which helps develop math sense and long term success".


William Ragsdale, Instructor 

William is a junior at KSU studying physics and mathematics hoping to eventually become a high school teacher with a dream of one day being a college professor. He loves science, math, gaming, and has love of seeing people improve their skills in any field. Fun fact about William is that his favorite number is 8,128 because it is the only “perfect number” between 1,000 and 10,000. He loves Mathnasium because “learning is my passion and seeing kids who believe they can’t, or have a hard time, end up excelling is an amazing thing.”

“The present is theirs; the future, for which I really worked, is mine.” -Nicola Tesla