About Us

Lexington Singapore School offers after-school K-12 math enrichment classes using the Singapore math methods. Besides in-person classes in Massachusetts, we also offer online remote classes.


What is Singapore Math

Singapore Math is a general term to describe the math instruction designed by Singapore’s Ministry of Education. Recent successes in International Mathematics and Science Study (TIMSS) and Program for International Student Assessment (PISA) in 2015 and 2019 demonstrate the effectiveness of the teaching methods.

Strong visualization

One huge appeal of Singapore Math is the use of pictorial representations. Students are introduced to concepts in a three-step approach, Concrete-Pictorial-Abstract (C-P-A) representation.

Problem Solving

At the heart of the mathematics framework from Singapore is problem solving, where students apply higher-order math skills to logic reasoning and challenging problem solving.

Academic Programs

We offer in-person and remote classes for all grade levels year round.

After School

Math Classes

Students meet once a week in-person at our centers or online via Zoom



Team classes participate in Regional and National Math Competitions


Summer Classes

Fun introduction to Singapore math and prep-classes for Fall

Qualified Teachers

Our Teachers

Our Teachers are recruited based on their teaching experience and caring personalities. Our students and parents consistently mentioned teachers as the main reasons they love our program!

  • Lavanya Vabai


  • Chandan Keshkamat


  • Nathalie Gruet


  • Kate Ray


  • Elsa Aviza-Oberg


  • Pelin Akan


  • Yen Truong


  • Soo Choi


Lavanya Vabai


Lavanya Vabai has a Bachelors Degree in Mathematics and Post Graduate Diploma in Mathematics. She also holds a certified degree in Montessori Early Childhood issued by the American Montessori Society and Master’s in Education from Gordon College, Massachusetts. Lavanya has been teaching Montessori Curriculum for last 7 years and strongly believes analytical skills can be imparted to all children through solid mathematical learning. She enjoys teaching and always gets fascinated how fast children can learn new concepts. Her hobbies include cooking different cuisines, enjoys music, movies and spending time with family.

Chandan Keshkamat


Chandan received her Master of Science degree from Goa University, India with top honors and ranking 1st in her college. A devoted mother, teaching is her passion and she loves working with students at all grade levels. She holds Massachusetts Teacher’s License to teach students in Grade 5 to Grade 12 and has been working as Teacher/Substitute Teacher/Exceptional SAT tutor at both public and private organizations such as Neighborhood Charter School-Boston, High Expectations, LLC. Malden, Huntington Learning Center-Waltham and Tutor Doctor tutoring agency.

Nathalie Gruet


Nathalie Gruet graduated from Wellesley College with a degree in Economics and Political Science. Her endless curiosity and enthusiasm for learning are contagious across the classroom. Through its beauty, abstractness, simplicity, and visuality, she enjoys presenting Math as an art form to her students. She enjoys creating a space where students feel comfortable to be creative in their problem solving strategies and ask questions. She deeply believes that Math can be (and is!) fun and most importantly, that with practice any individual can develop a mastery of.

Kate Ray


Kate Ray is originally from Arlington, MA. Kate recently spent two years working as a preschool teacher in a trilingual school in Prague, Czech Republic. While she lived in Prague, she earned her Teacher of English as a Foreign Language Certificate and spent much of her time outside of the classroom teaching English to children and adults in individual and small group settings. She is currently pursuing a dual BA degree in Early Childhood Education and Psychology and hopes to pursue a graduate degree in Child Development, focusing on the many ways different facets of culture and educational styles impact learning.

Kate is also currently a Research Assistant in a Child Development Study regarding the efficacy of relationship-based autism intervention in young children. Kate strives to build a welcoming classroom environment in which each student feels comfortable and excited about learning. She is a strong believer that building great relationships with students and their families is at the cornerstone of learning. In her free time, Kate likes to travel and try out new recipes.

Elsa Aviza-Oberg


Elsa Aviza-Oberg has taught exclusively elementary mathematics for the past 10 years. She has led professional development for teachers in Waltham Public Schools and coached teachers in math content. She facilitates a coding and mathematics program developed at the Education Development Corporation through a partnership with the Waltham Public Schools.

A Phi Beta Kappa, magna cum laude graduate from George Washington University, Elsa earned a Masters’ Degree from Northeastern University. She is a strong believer in the importance of early math education for children, especially deep conceptual understanding that helps children succeed in algebra and higher level mathematics.

Pelin Akan


Pelin Akan studied Industrial Engineering at Ozyegin University, Turkey, and she is currently doing a Master of Mathematics Education at Lesley University. She has been working in the education sector as a teacher, counselor, and manager for the past eight years and worked with students of various ages and backgrounds.

She entered the field of Mathematics Education so that she can combine her two life passions: Mathematics and Education. Upon completing her Master’s, she intends to pursue a Ph.D. in Mathematics Curriculum Design.

Yen Truong


Yen Truong is from Quincy, MA and graduated with a Bachelor Degree in Education from Ashland University. Mr Yen holds two MA mathematics teaching licenses (grade 1-6 & 8-12). From 2009-2017, he has lived and taught in France, United States and Taiwan. Mr Yen speaks Vietnamese, English, French and Chinese and his multi-lingual skills and love for exploration have enabled him to travel all over the world. During his free time, he likes to play the piano.

Soo Choi


Soo Choi is an early elementary teacher from New York City. She has a bachelor’s degree in Finance but found working with children more enriching. Therefore, she later attained a master’s degree in Early Elementary Education from Hunter College in New York City. Currently, she is teaching second grade in a New York City public school. She loves working with young learners and strives to make learning engaging for them. Math is a subject she enjoys and works to make math concrete for her students. She is experienced in implementing lessons from various math curriculums and is excited to join Lexington Singapore School. When she is not teaching, she enjoys spending time with her family, savoring a good cup of coffee and hiking.

Our Centers

We currently have two centers in the greater Boston area.

Lexington, MA

Acton, MA

Lexington MA

19 Muzzey St,
Suite L40,
Lexington, MA 02421.
United States.

Acton MA

271 Great Rd,
Suite 26,
Acton, MA 01720.
United States.