Singapore · Private Tutor

Teaching Students
to Think,
Not Just Solve

More than 20 years of patient, conceptual mathematics tutoring for Secondary and JC students — building genuine understanding and exam-ready confidence.

0+ Years Experience
0+ Students Taught
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Lester — Private Mathematics Tutor
NUS · Georgia Tech
Significant Grade Improvements
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About

Why Choose Lester?

Patient, conceptual, and genuinely invested in every student's growth

Caring & Encouraging

I create a genuinely supportive space where students feel safe to make mistakes and ask questions freely — without pressure or judgement. Rebuilding confidence is just as important as getting the right answer.

Friendly & Approachable

Students often tell me I don't feel like a typical tutor. Lessons are warm, conversational and low-pressure — making it easier to stay curious, open up, and engage deeply with the material rather than just trying to get through it.

Trustworthy & Professional

With 20+ years of experience, qualifications from NUS and Georgia Tech, and a consistent track record of significant grade improvements — students and parents can rely on a structured, proven approach to learning.

I help students move beyond memorising steps to genuinely understanding mathematics — and that shift makes all the difference in exams and beyond.

With more than 20 years of tutoring experience across Secondary, JC and early university mathematics, I combine diagnostic questioning, original custom problems, and real-world applications drawn from my industry background in engineering, finance and data analytics — to build confident, independent problem-solvers.

  • Teach to fish — build understanding that transfers to new and unfamiliar questions
  • Diagnose first — find the exact gap through targeted questions, then address it in real time
  • Custom problems — original questions designed for your specific misconceptions
  • Real-world links — connect maths to engineering, data, finance and everyday decisions

Experience

Present Full-Time Private Mathematics Tutor

Secondary · JC · University · Singapore

2019 Guest Lecturer

Nanyang Technological University (NTU)

2018 – 2020 Tutor — Kovan Learning Centre

Secondary & JC Mathematics

2017 Tutor — AGrader Learning Centre

Secondary & JC Mathematics

What I Teach

Mathematics at Every Stage

From O Level foundations to A Level mastery and early university support

1-to-1 Sessions Small Group (2–8 students) Online & In-Person
Secondary School

E Maths & A Maths

  • Elementary Mathematics
  • Additional Mathematics
  • Algebra, Geometry & Trigonometry
  • Calculus fundamentals
  • O Level examination prep
Students often achieve A grades
Most Requested
Junior College

H1 & H2 Mathematics

  • H2 Mathematics (full syllabus)
  • H1 Mathematics
  • Calculus & Differentiation
  • Statistics & Probability
  • Vectors & Complex Numbers
Significant grade improvements including E→A & U→B
University

University Mathematics

  • Calculus & Analysis
  • Linear Algebra
  • Statistics & Probability
  • Engineering Mathematics
  • Discrete Mathematics
Backed by Master's-level applied mathematics
Student Outcomes

Results That Speak

Significant grade improvements — and a genuine shift in confidence and mathematical thinking

E A

JC H2 Mathematics
A-Level examinations

U B

JC H2 Mathematics
A-Level examinations

4 → 21
out of 25

Score on a single topic after just 3 targeted lessons

Secondary Maths

Students consistently achieve A grades in O Level E Maths and Additional Maths

Student Voices

What My Students Say

"

He creates his own questions tailored to my learning — something I've never experienced with any other tutor. Every session feels designed specifically for me.

Y
JC Student from YIJC H2 Mathematics
"

I appreciate how after teaching content, he gives real-life examples on the spot to test my understanding. I really enjoy it — I finally understand why we learn this, not just how.

T
JC Student from TMJC H2 Mathematics
"

Very approachable and encouraging. I do not feel the usual pressure I get with teachers. He is patient with my questions and explains things clearly until I actually understand.

G
Secondary School Student from St Gabriel Secondary School E Math
"

You teach really well. You are very approachable and encouraging. I learned a lot from the way you explain and solve problems — it really changed how I approach maths.

C
Secondary School Student from CHIJ St Nicholas Girls' School Additional Mathematics
Background

Credentials & Qualifications

A strong academic foundation that underpins every lesson

Academic Qualifications

Master of Science — Industrial Engineering Georgia Institute of Technology · GPA 3.8 / 4.0
Master of Science — Logistics & Supply Chain Management National University of Singapore · CAP 4.9 / 5.0
Bachelor of Engineering — First Class Honours Industrial & Systems Engineering + Financial Mathematics · NUS · CAP 4.8 / 5.0
Raffles Institution & Raffles Junior College A in JC Mathematics · A1 in O Level E Maths · A1 in O Level A Maths

Professional Certifications

Association of Mathematics Educators (AME) Member — Singapore professional body for mathematics educators
Advanced Certificate in Learning & Performance (ACLP) Formal adult education & instructional design qualification
Lean Six Sigma Black Belt Applied statistical rigour & data-driven problem solving

Industry Experience

Industry Statistician Applied statistics in real-world engineering and business environments
Operations Research Subject Matter Expert Optimisation, modelling and decision science across industry projects

Languages

🇬🇧 English 🇨🇳 Mandarin
Download Full Resume (PDF)
Get in Touch

Start Your Journey Today

Reach out and let's discuss how I can help your child build real mathematical confidence

WhatsApp

Fastest way to reach me. Drop a message and I'll respond promptly.

+65 8758 8329

Instagram

Follow for maths tips, problem walkthroughs and student insights.

@radicalsimplexitymath

Singapore — Available for in-person and online lessons island-wide

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