
Secondary Mathematics/IP/IB
Mr Choo is the founder of The Knowledge Key tuition centre. He has taught in several secondary schools and has close to 20 years of private and group teaching experiences. Mr Choo is also an accomplished author of several Additional Mathematics guide books published by Hodder Education and EPH, and are widely used in many secondary schools.
Mr Choo’s books include:
- O Level Additional Mathematics 1000+ for Sec 3
- O Level Additional Mathematics 1000+ for Sec 4
- Additional Mathematics Revision Guide 3 (1st edition)
- Additional Mathematics Revision Guide 4 (1st edition)
- Additional Mathematics Practice Guide (1st edition)
- O Level Additional Mathematics Revision Guide 3 (2nd edition)
- O Level Additional Mathematics Revision Guide 4 (2nd edition)
- O Level Additional Mathematics Practice Guide (2nd edition)
- Examination Papers O Level Additional Mathematics (1st edition)
- Specimen Exam Papers Additional Mathematics (2nd edition)
- All About Additional Mathematics Revision Guide O Level Volume 1 (3rd edition)
- All About Additional Mathematics Revision Guide O Level Volume 2 (3rd edition)
- All About Additional Mathematics 1001 Questions for O Level (3rd edition revised)
- Revision Guide Additional Mathematics 1001 Questions for O Level
Highly effective in his teaching methodologies coupled with unique methods of solving have made the learning of mathematics a breeze for his students. He has derived many “cheat codes and formulas” for solving of Elementary Mathematics as well as Additional Mathematics, ranging from Secondary One to Four. Mr Choo ‘Make Maths Easy’ system has helped many students aced their examinations, scoring countless distinctions over the years.







Mr Choo’s patience and passion for mathematics is eminent and evident through his highly sought after classes that are typically filled by the beginning of the term. He will provide ‘Clinic session’ for the weaker students to push and help them to attain better grades. His teaching often will stretch beyond classroom scope, as he cares for the students’ well-being; he provides counselling to the students, constantly motivating them to excel, not just in studies but also moral values, thus winning many parents’ trust and support.














As the saying goes, “Practice makes perfect”. Memorising formulae and writing them on index cards make revising easier but it is only through the constant applications of the concepts and formulae that will help to reinforce and internalise them. Suddenly Additional Mathematics becomes so much easier to learn. The confidence built up from all the practices helps in achieving good results in tests and examinations.
- Aven Choo
next