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

Sign up for a FREE evaluation to see if our program is a good fit!

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

  • Cameron Chandler


  • Pierina Santos-Margaritov


  • Lydia Eldridge


  • Jim Brennan


  • Arianie Keeney


  • Jean S C Chong

    Early Education Specialist

  • Yen Truong


  • Wei Li Pek


Cameron Chandler


Cameron graduated Summa Cum Laude from Amherst College with honors in both mathematics and music, and has a Master of Music degree in jazz composition from the University of Massachusetts Amherst. Cameron has been teaching and tutoring students of all ages in math, music theory, music performance, chess, and board games for over ten years. Apart from teaching, Cameron is an actively gigging musician, trumpeter, and composer.

Pierina Santos-Margaritov


Pierina brings her experience as a literacy coach, special education teacher, homeschool parent, SAT / ACT tutor, and paraeducator. She spent the last five years at the middle school level focusing on identifying and closing academic gaps, including working with students one-on-one, in small groups, and overseeing intervention groups. Pierina worked with teachers across content areas on data-led instruction to focus on providing students with opportunities to demonstrate grade-level mastery. As a literacy expert, she sat on the panel of CURATE to review middle school English language arts curricula to ensure they meet Massachusetts state standards and students’ needs. She is passionate about accelerated learning, curriculum development, and providing meaningful professional development opportunities to teachers.

She holds a Bachelor of Arts in Spanish and Italian from St. John’s University and a Master of Education in Elementary Education and Special Education from Rivier University.

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.

Jim Brennan


Jim holds a Bachelor of Science in Computer Science from the University of Maryland, College park and a Master of Science from American University, Washington D.C. After more than fifteen years as a computer programmer and Systems Manager, Jim began teaching mathematics and computer technologies and has worked in both public and private school settings. His additional graduate work in teaching mathematics and his training with Common Core Mathematics earned him the credentials to be selected as the author of The Everything Parent’s Guide to Common Core Math Grades 6-8 (available on Amazon). Jim continues to develop mathematics and computer education resources for teachers, parents, and students.

Arianie Keeney


Arianie Keeney is a Communications and Marketing professional in Winchester, MA. Arianie began her career as a teacher with the Ministry of Education, Singapore prior to pursuing a career in journalism in the USA. Arianie has written on international affairs, politics, government, education, and culture, in the Greater New York City area, and worked in online, radio, and broadcast journalism, in Houston, Texas. Arianie has also lived in Dubai, United Arab Emirates for ten years, where she was a Communications, Marketing, and Engagement Director, managing organizational operations, community engagement, digital marketing, and events management within the Dubai Classical Music scene. Arianie’s third culture upbringing from Southeast Asia – Singapore, Thailand, and Indonesia, as well as extensive living around the world as a third culture child and adult shape her view of the world today. Arianie credits her education of the Singapore Math curriculum for instilling her children with a strong foundation of Mathematics.

Certified Teacher, Ministry of Education, Singapore.
Master of Art in Diplomacy, International Conflict Resolution
Norwich University – Graduated with Magna Cum Laude.
Bachelor of Science in Political Science
University of Houston – Graduated with Magna Cum Laude.
Bachelor of Art in Communications, Broadcast Journalism, Photography, Film & Digital Media
University of Houston – Graduated with Magna Cum Laude.
Diploma in Education, English Literature, Art Theory, Digital Media
Nanyang Technological University, National Institute of Education, Singapore – Graduated with Distinction.

Arianie is the recipient of the Texas Association of Broadcasters Belo Corporation Scholarship 2003/2004, the George Kirksey Scholarship 2002/2003/2004, the Houston Press Club Scholarship 2003/2004, the Maxine Mesinger Houston Chronicle Scholarship 2002/2003 and a member of the Golden Key International Honour Society and the Phi Beta Delta International Scholar Honor Society.

Jean S C Chong

Early Education Specialist

Jean S C Chong was born and educated in Singapore. She has 2 Associate Degrees, one in Business Studies and the other in Culinary Arts and Science. In addition, she also holds a certified degree in Montessori Early Childhood and Development issued by the American Montessori Society. She has been a teacher for preschool/kindergarten in the past 19 years and a Montessori teacher in the last 11 years of the 19 years. She is currently a Curriculum Director at Rockland Montessori Academy.

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.

Wei Li Pek


Wei Li Pek is from Singapore and received her bachelor’s degree from University of Essex (UK) in Electronic Systems Engineering with First Class Honors. Wei Li is a strong believer that early math matters. She believes the mathematics that kids are doing in Grades K-2 lay a strong foundation for the work they are going to do beyond that and sets them on a path towards numeracy skills and confidence in later life. In her spare time, Wei Li enjoys crafting, skiing and spending time with her family.

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.