Welcome to Mathnasium of Dedham


Carlene O'Marra

My daughter feels more confident and always excited to want to do anything that have ro do with math. Thanks t...

Patience Aduware

Contact us


  • 626 Washington Street
  • Dedham, MA 02026
  • Call (781) 686-1130

Hours of Operation

Instructional Hours

Mon 3:00PM - 7:00 PM
Tue 3:00PM - 7:00 PM
Wed 3:00PM - 7:00 PM
Thu 3:00PM - 7:00 PM
Sun 10:00AM - 2:00 PM

Office Hours

2:00PM - 6:00 PM
2:00PM - 6:00 PM
2:00PM - 6:00 PM
2:00PM - 6:00 PM
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Hello. I’m Leslie Rosenthal, Center Director of Mathnasium of Dedham, your neighborhood math-only learning center. We provide proven, effective, and FUN (yes, kids love learning math here) math tutoring to students in elementary, middle school, and high school.

We specialize in math-only instruction with a focused, caring, and fun learning approach that delivers results.
We proudly serve local communities and schools, including:

  • Dedham, MA
  • Dedham Middle School
  • Dedham Country Day School
  • Oakdale Elementary School
  • Avery Elementary School
  • Riverdale Elementary School
  • The Rashi School

Dedicated to providing the best instruction

Our instructors are enthusiastic about math and specially trained in the Mathnasium Method. They create a caring and encouraging environment where your child will learn and thrive!

Meet the Team gallery1

Instructor Spotlight

Leslie Rosenthal
Leslie Rosenthal is an experienced math teacher with over ten years experience working in Massachusetts public middle and high schools, focusing on English Language Learners and Students with Disabilities. She studied Mathematics and Secondary Education at Vanderbilt University, and earned her Maste(...)



One-on-One Assessment

Our unique assessment pinpoints what each child already knows and what they still need to learn.


Customized Learning Plan & Goals

Our detailed plan takes your child step-by-step from where they are to where they need to go.


The Mathnasium Method™

Our proprietary curriculum and teaching method fosters skills that take hold and build upon one another.

Latest News & Posts

Need a Change in Math-itude?

Jan 8, 2022 | Dedham

Ever wonder if your child's attitude towards math is hindering their progress? Can a bad attitude affect their grades? Read on… A recent study called "Investigating Students' Attitude Towards Learning Mathematics" sheds more light on the subject. I..

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"Our son is having such a great experience at Mathnasium in Dedham! He enjoys going and we appreciate the personalized attention that he receives. He is attending as an enrichment program and his math skills have grown tremendously over the last few months. Both the owner and manager of the center take their jobs very seriously, but also find a way to engage the young people that they work with. The staff is exceedingly professional and knowledgeable. We have recommended Mathnasium to several families who also have children who are doing well in math, but are in need of a challenge. We are super happy that we found this program for our son!"

— Paula Bowles


626 Washington Street

Dedham, MA 02026

United States