After School Singapore Math Classes

Small Group Classes based on the Singapore math curriculum

Balanced and Rigorous Curriculum

Why Singapore Math

We adopt a balanced math curriculum based on the Concrete-Pictorial-Abstract Singapore math pedagogy. Using strong visualization and modeling, we emphasize Logic Reasoning, Early Algebraic Thinking, and Problem Solving. Our goal is to establish a strong mathematical foundation in our students so that they would enjoy challenging math tasks.


Abstract concept is first introduced using physical, interactive concrete objects, e.g. counting objects


Students use visual representations of concrete objects to model problems, making them easier to comprehend


Students understand concepts at a symbolic level, e.g. using symbols for mathematical operations and algebra

Congratulations to our students on their fine achievement in the CML 2020-2021

Our Grade 4, 5, 6 and 9 teams are Regional Winners in the CML 2020-2021 competition season! Massachusetts is in Region 1, which is our New England region. It includes: CT, MA, ME, NH, VT, RI.

Why Parents and Students Like Our Program

Conceptual Understanding

It is not just about learning algorithms and procedures but understanding why they work.

Problem Solving

Being able to use the toolsets to solve novel multi-step problems you have not seen before.

Small Group Sizes

Group sizes are small to ensure individual attention and class participation.

Qualified Teachers

Caring and experienced teachers that encourage class discussion and support learning.

Find Out More About Our Program

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Lesson Structure

Each week’s lesson consists of two parts:

Foundational Math

Focus on conceptual understanding and procedural fluency. Topics are taught linearly and circled back the next year, promoting deeper understanding.

Problem Solving

Students are exposed to unfamiliar problems every week, requiring them to deeply comprehend the problems and organize to problem-solve.

For my son, the additional reinforcement of math principles that Singapore Math is so important for his memory, processing ability, and math confidence. Ms. Jean is a terrific teachers who my son both respects and genuinely enjoys learning from. I wish she was in his classroom every day!

– Parent of 2nd Grader

We like the small class size, and teachers providing feedback about my child when necessary especially when I can also help, CML problems and meets, the active involvement of the owner Kar Hwee, which has maintained and improved the quality of instruction over the years!

– Parent of 4th and 7th Graders

Love the practical application of math in the problems presented. It’s not just about learning how to compute a calculation, but how to think through what the word problem is asking and how to apply math (and which tools) to the solution.

– Parent of 6th Grader

Our Journey

Our program started in 2015 in our dining room. Over the years, we have build a strong team of teachers and have helped many students build strong mathematical foundation and learn to enjoy math.


In-Person and Remote Classes


Experienced Math Teachers


Happy Learning Students

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Our Teachers

  • Ilene Weiner


  • Rana Razi


  • Janet Keefe


  • Lydia Eldridge


  • Nathalie Gruet


  • Kinnary Raythatha


  • Elsa Aviza-Oberg


  • Sharon Yee

    Assistant Director

Ilene Weiner


Ilene Weiner has been working with children from ages six to sixteen for the past 30 years. She has worked at a variety of schools teaching from different math curriculums. She currently works with Middle School students individually, in small groups, and in the classroom. She has previously taught math in grades one, two and three. Ilene graduated from Tufts University with a B.A. in Economics and Psychology. She received her M.B.A. from Boston College and her M.Ed. from the University of Massachusetts. She currently resides in Lexington.

Rana Razi


Rana Razi has been teaching math at various schools for the past ten years. Prior to switching to the field of education she had worked as an engineer in the Boston area. Her goal is to make math a more enjoyable subject for students. Currently she is working at Boston Public Schools.


Bachelor of Science in Electrical Engineering from Boston University

Master of Arts in Teaching Mathematics grades (5-12) from Western Governors University

Teaching certification for teaching math grades 8-12 in Massachusetts and Oregon

Janet Keefe


Janet Keefe has a Bachelors Degree in Mathematics from Assumption College and a Minor in Elementary Education. She has a diverse background teaching children of all ages from Grade 1 to Grade 12 Calculus. During her college years, she worked at Nelson Place Elementary School in Worcester, MA as a Teachers Assistant aiding Elementary classes in all areas, including children with ABA, Autism, and Non-Verbal learning challenges.
Janet likes to make the classroom experience fun, including virtual learning, by engaging students to show their work, working as a team, and on occasion bringing in her guitar! She currently works full time doing Marketing as her other passion and skill set. When she has free time, Janet enjoys skiing and snowboarding. Janet is currently attending Graduate School, at Babson College in Wellesley, MA, looking to obtain her Babson MBA in Entrepreneurship and Marketing.

Lydia Eldridge


Lydia Eldridge is from California where she got her a bachelor’s degree in Conservation Biology. Currently pursuing a graduate degree in Environmental Health Engineering, she is passionate about equitable STEM education and enjoys getting people excited about math and science. She has had the opportunity to work with and teach middle school students from all over the greater Boston area, in traditional classrooms and even on an island! In her teaching, Lydia emphasizes the practical aspects of math and highlights how skills learned can be applied to everyday life. In her free time, she enjoys hiking, reading, and working in her garden.

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.

Kinnary Raythatha


Kinnary Raythatha has a diverse background teaching students and leading schools from the preschool to the high school level. Kinnary taught in New York City and worked as a Dean of Special Education as well as a Resident Principal in Baltimore County and City Schools. She earned a B.S. in Business Management from SUNY Old Westbury and a M.S. in Education from Fordham University. Kinnary is certified in Elementary and Middle School Education, Special Education, and School Administration. In addition, she is also certified as a preschool Teacher and Director. Earlier in her career, she was selected to participate in the New Leaders for New Schools program, a nationwide Principal training program for high potential leaders. In teaching, her overarching goal is to develop a student-centered environment where students are equal partners in the learning process. She believes that it is essential to engage students and facilitate their ability to be active learners.

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.

Sharon Yee

Assistant Director

Sharon Yee followed her passion of teaching by enrolling and graduating from Lesley University with a Master in Education. Prior to that, she earned her Bachelor’s degree from Boston University, and a Master from Bentley College with a concentration in Accounting, Business Administration and Taxation. Sharon is a Mass certified teacher in Elementary Education 1 – 6, Moderate Special Education K-8, and Middle School Math 5 – 8. She currently teaches 7th and 8th grade math. Sharon believes that a student-centered philosophy is where students learn best, when students’ needs guide the teaching approach, and the teacher acts as a facilitator. She lives in Newton and enjoys traveling, walking, playing the piano, and “fiddling” with the violin in her free time.

Our Center

We are located right in Lexington Town Center, behind the Cary Memorial Library. Street and meter parking is available around the area and in the Town Municipal Parking Lot across the street.


19 Muzzey Street, Suite L40, Lexington MA 02421


Tel: 781-479-2331

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Lexington MA

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

Acton MA

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