About

Hi, I’m Alex

I’ve been teaching IB, IGCSE and AP Mathematics to international-school students in Singapore since 2010. Over 16 years, I’ve guided hundreds of students through some of the most demanding maths curricula in the world and helped them reach universities around the world.

I focus on building intuition and logical structure, not memorising formulas. Before teaching full time I worked as an electrical engineer, and I still teach mathematics as a tool for reasoning.

I believe the best learning happens when students are given room to think, make mistakes and find their own solutions. My role is to guide that process with patience, clarity, and 16 years of knowing exactly where students get stuck.

Good results in one subject rarely come from that subject alone. With private students I look at the whole picture, including study habits, planning and revision, and help them build a way of learning that works in every subject.

Today I teach a small number of private students, create online courses through Math with Alex Academy, offer university admissions consulting to a few families each year, and teach group classes at an academy in Orchard, Singapore.

Portrait of Alex Koo
16+years teaching in Singapore
M.S.Columbia University, Electrical Engineering

Background

Education
B.S. Physics, Korea UniversityM.S. Electrical Engineering, Columbia University, New York
Admissions
Columbia University Alumni Interviewer, 2020–2022
Teaching
16+ years teaching IB, IGCSE, AP and US-curriculum mathematics in SingaporeGroup classes at an academy in Orchard
Engineering
Electrical engineer before teaching full time
Also
Member of Mensa Singapore

Schools my students have attended

International and IB schools in Singapore and abroad.

Singapore

  • UWC South East Asia (Dover, East)
  • Singapore American School
  • Overseas Family School
  • International Community School
  • ISS International School
  • Tanglin Trust School
  • Chatsworth International School
  • Nexus International School
  • Australian International School
  • Anglo-Chinese School (Independent)
  • Anglo-Chinese School (International)
  • St. Joseph’s Institution
  • St. Joseph’s Institution International
  • Hwa Chong International School
  • School of the Arts (SOTA)
  • North London Collegiate School (Singapore)
  • Singapore Korean International School
  • Dover Court International School
  • EtonHouse International School

Outside Singapore

  • North London Collegiate School Jeju (Korea)
  • Seoul Foreign School (Korea)
  • Seoul International School (Korea)
  • King’s Academy (Jordan)

Enquiries for May 2027 are open

Tell me about your child’s course, school and goals. I read and reply to every enquiry myself.

Send an enquiry