Mathnasium 361 5th Ave, Brooklyn NY 11215 (718) 369-6284

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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:

Center DirectorAli Sasso, Owner/Center Director




 Thao Tran, Center Director

   Thao got her Bachelor’s Degree in Environmental Sciences from UC Berkeley. Besides her passion in promoting sustainability and protecting the environment, she really enjoys working with children and young adults. Thao has experience as a private tutor and as a math teaching assistant while she was still in school. After graduation, Thao worked at Mathnasium of Albany-Berkeley in California as an assistant director for a year.

    She moved to NYC to work as a middle school math teacher, but later decided to be a part of Mathnasium again. Thao hopes to further her career in education and the environmental field.

Jason Mix, Lead Instructor

     Jason received a B.A. in Mathematics from Wesleyan University, in Middletown, CT. Before becoming an instructor at Mathnasium Jason was a teaching assistant in college and has worked as a private tutor. He also worked as a relocation accounting analyst. 

     When asked what prompted his desire to work for Mathnasium he stated: "I wanted to exercise my brain and be involved with mathematics. I also feel energized by the spirit of children."    

PJ Bracciodieta, Instructor

     PJ attended Pace University and received a degree in quantitative business analysis with a concentration in marketing. In the past, PJ worked at a bridal salon, law firm, and accounting firm. When asked what prompted her desire to work for Mathnsaium she stated: "I absolutely love to work with children and want them to understand and have confidence in mathematics."

     PJ grew up on Long Island and she enjoys vacationing on the beach with her family and cooking.

Chelsea Alexis, Instructor

     Chelsea received her B.A. in Business Administration at New York Institute of Technology. Before getting involved with Mathnasium she worked in the food service industry for 4 years and also coached Varsity Basketball for 2 years. Chelsea is also currently a Wedding and Event Planner.

     When asked what prompted her desire to work for Mathnasium she stated: "I have always loved math and enjoy helping students to understand math."

Mike Delehant, Instructor

     Mike received his bachelor's degree from University of California at Santa Barbara in Business Economics and his MBA at the University of California at Davis. Before becoming an instructor at Mathnasium, Mike was a paralegal in San Francisco and then interned for a startup and completed a consulting project for a local corporation.

     When asked what prompted his desire to work for Mathnsaium he stated: "I used to coach youth soccer and basketball for several seasons, and I enjoyed this experience. Given my educational background in math I figured I could be a great instructor for the students of Mathnasium."

     Mike is new to New York and the East Coast, having lived in California his entire live before recently moving.

Julean DeJesus, Instructor

     Julean is majoring in Public Health at Brooklyn College. Before working at Mathnasium he was an usher with the education department with the New Victory Theater.

     When asked what prompted his desire to work for Mathnasium he stated: "After finishing my time with the New Victory, I wanted a way to continue working with kids and this location near my home was a great opportunity to do so while finishing school."

     Julean was born and raised in New York City and has lived here in Park Slope for 11 years.