What Our Students Say
Jack's passion towards math is evident in his teaching. I never fail to be inspired by his stories and experiences that have moulded him and how he apply and relate them to math, providing food for thought after every lesson. Besides his interesting way of teaching, he provides additional help after class or even through whatsapp to those who need it, to ensure complete understanding of any concepts or questions. It is his dedication that fuels this drive in me to achieve better grades and not to disappoint him. Under his guidance, I developed immense understanding and appreciation for math, as Jack is one tutor who explains all these formulae which many of us merely apply without wondering the workings behind it. With his different methods of teaching and approachable personality, he will definitely make your journey in conquering math an easier and enjoyable one.
Lee Shiyun | National Junior College
My experience with Math since secondary school can at best be described as a struggle – and not one which I was succeeding at. A firm believer that Math was all about drilling questions until familiarity, I pushed myself to complete as many practice questions as I could, hoping that with enough work I would understand the concepts that were so foreign to me and pull up my grades. It wasn’t until the beginning of my J2 year that I realized how many concepts I simply didn’t understand, and joined Jack's lessons praying for at least a passing grade by the time ‘A’ levels came around.

Jack has done much more than that, and not merely in terms of improving my results. Lessons with Jack don’t feel like your regular tutorial lessons or lectures, where you sit and attempt to absorb as much content as you can. Jack engages the class with amusing anecdotes and stories about his experiences, and his passion for teaching and for the subject is so evident in his manner that it is contagious. Other teachers may boast of how their students have improved their failing grades in a subject, but what Jack does for his students goes above and beyond that – he inspires his students to want to learn more about Math, and to come to care about how much they understand about Math rather than simply doing the questions by rote.

Even beyond his ability to motivate the most unwilling of students, what has impressed me most about Jack is his dedication to all his students. Ask him any question during the week, and Jack is sure to explain until you feel completely confident of your understanding. As a teacher, Jack is exemplary both in his caliber and his commitment to teaching; he is, without a doubt, someone who will spark your interest, improve your results, and remain a mentor and friend beyond that.
Alisa Toh | Raffles Junior College
Jack’s teaching opens doors you never knew existed. He offers you glimpses into strange possibilities where Math can be applied – a diverse range from engineering science to corporate surveys among others. His teaching methods are really unique and interesting – using inspirational and personal stories and analogies to make a strong and memorable statement. Jack’s obvious passion towards Math is contagious – you can’t help but look at Math in an increasingly favourable light under his tutelage.

That’s not to say he has nothing to offer for more results-oriented people (and parents!) that desire that coveted ‘A’. Jack certainly gets you results - he is one of the most dedicated tutors I have ever encountered. You can literally Whatsapp him a challenging Math question at midnight and he will answer; that’s how much commitment he places on his students’ learning progress. He will painstakingly guide you through your learning, giving you numerous tips, tricks and stratagems you have never encountered before with regard to handling the GC, breaking challenging questions into simple steps, and even the proper thought processes when doing certain questions. I find it very hard to believe that other Math tutors will take the enormous effort needed to develop an entirely novel paradigm of studying Math, while TOP™, a methodical and step-by-step outline for basically every type of question for each topic in JC Math, can be as short as two A4 pages. It’s exactly what you’re supposed to have in your brain before entering an examination laid out nicely in physical representation. If you’re looking for a tutor that will pique your interest in Math, take the necessary time to strengthen your shaky understanding of Math, or even transform Math into a positively easy subject, Jack is unequivocally your number one choice.
J.J. Ong | Hwa Chong Institution (Junior College)
I have greatly enjoyed and benefited from lessons with Mr Jack. The use of Outlines and C+Qs in teaching and subsequently revising topics in class led these to be essentials I used in my personal revision. And the way he carried out lessons and drilled concepts and steps into us really helped me approach questions using these as a guide. It had grounded my understanding and foundation. Mr Jack’s revision classes are also really unique and effective. Besides just getting us to practice and practice, he targets specific segments of topics and drills us, and then exposes us to such questions in different variations. I feel that being in his class, I have no room for complacency, and am thus always motivated to keep on practicing and improving. I also felt that the methods he taught us to revise and practice could be brought over to my other subjects and hence found them highly useful. Additionally, Mr Jack is a really passionate and caring teacher and he puts a lot of thought into his lessons and materials. He would share occasional stories in class and explains even the rationale behind his plans and methods. I think my journey doing H2 math would not have been as smooth and enjoyable if not for the guidance I received from Mr Jack :)
Charmain Koh | Raffles Institution (Junior College)
Tuition has always been boring to me. Math tuition was the worse and I have always been failing my mathematics. To me, it was a torture and I disliked it so whenever possible I would avoid it. When I first started JC I struggled with Maths for the first 3 months, failing consecutive tests. But one day I chanced upon Achevas, hesitant in the beginning but I still decided to give it a try. "WOW" - this is the word I would use to describe the experience! After learning Math from Jack, I begin to view it as a fun and exciting challenge. And with the aid of Achevas' unique learning process, I began to do well for my tests. However I did badly again during my mid-year but Jack continued to guide and mentor me, correcting my exam techniques and changing my mindset, and within the next two months I experienced a five-grades improvement for my end-of-year! Jack is an amazing teacher and motivator!
Justin Chew | Pioneer Junior College
The best teachers inspire you, entertain you and you end up learning a ton without even knowing it. Jack was one such teacher. He not only provided concise, visually appealing topical summaries for easy revision, but also patiently stayed back after lessons to go through concepts we were unsure of and work out any questions we could not solve. His step-by-step approach meant that his explanations for even the difficult problems became supremely easy to grasp. I especially enjoyed the fact that rather than settle for letting us memorise formulae, he went into the reasoning and proofs behind them. This proved to be particularly beneficial as it addressed misconceptions I was not even aware I had! His lessons were rather lively as well, making it vastly easier to concentrate and absorb the material. All in all, the year I spent under Jack’s tutelage not only improved my mathematical ability but also nurtured a deeper appreciation for the subject.
M Kayal Pillay | Raffles Institution (Junior College)
Math was torture until I found Achevas. Jack's explanations were so clear, it was like an evil veil was magically lifted from my eyes so that suddenly I could do math!! He has a precise, systematic answer explanation for how to do everything (except integration techniques, for which the answer was, sadly but truly, "practice"). And if you forget, you can find it on Achevas TV, or just ask Jack again! He was always really approachable and easygoing, and I never dreaded lessons. I highly highly recommend Achevas x10000. I know I wouldn't have survived JC Math without it.
Sarah-Kei Lauw | Raffles Institution (Junior College)
Once upon a time, in the land of achievers, "Achevas", there lived a commando named Jack. One day, he met two lost souls who were desperate of help as they failed to climb to the top of the beanstalk despite several attempts. With his TOP™ methodology, he taught them "concepts and questions", which is the secret to reach the top of the beanstalk. The journey was arduous, leaving them torn and tattered but he continued to inspire them with his passion, allowing them to reach the top of the beanstalk! He led them in the fight with the math giant on the beanstalk, providing them with useful tactics promptly when in need, enabling them to defeat the math giant eventually. They would encourage everyone to join Jack in this fight to climb up the beanstalk and defeat the giant. While it may not be easy, they promise that it will be a fulfilling and exciting journey.
Joan and Baoyi | Hwa Chong Institution (Junior College)
Through lessons with Achevas, I learnt the importance of understanding Math concepts. Previously I had disliked Math and had thought that memorizing formulas and the method of answering would suffice. Now that I have understood the concepts and the basics, I am able to do Math questions with more confidence. Lessons are also interesting, with Jack using analogies to help us understand certain concepts better. This has definitely changed my mindset that Math lessons are boring, and has helped with my absorption of lessons. There is also no fear of having problems with understanding, because Jack is very approachable and we can clarify our doubts with him without feeling pressured. He would also give us suggestions to change our way of presentation or to make some notes so that we were able to see the question and see our train of thought more clearly. Thank you Jack! :D
Ng Yung Hian | Hwa Chong Institution (Junior College)
I started math tuition with Jack when it was nearing prelims and through his guidiance and encouragement, I was able to discover math in a different light and able to fully comprehend what was required of the demanding A'Level syllabus. Jack was able to provide sufficient and essential notes and practices to aid in my preparation and ensured that we were equipped with key skills in time management and strategies to tackle the Mathematics Paper. He was also amazingly able to spark the slightest of interests even within the most dreaded topics. My experience with Jack within a short period of 3 months was exceedingly fruitful and definitely boosted me in my pursuit for mathematics excellence.
Chua Wen Bin | Anglo-Chinese Junior College
Jack's Thorough Outlining Process (TOP™) learning methodology has greatly strengthened my fundamental understanding of math concepts especially in topics such as Vectors and Calculus. By dissecting complex formulas into basic core concepts, I can understand and apply. Jack provides concise notes that are great studying material. He is a jovial and encouraging tutor who is akin to a friend. He does not stress us but provides us as much help as he can during the A level period. His interactive and enjoyable lessons are something I look forward to every week :)
Tong Ping Hui | Hwa Chong Institution (Junior College)
I do not know how lucky I am to meet Jack during my A level preparation. His approach towards maths was different from what we used to learn from school - He used TOP™ to guide and show us overall understanding of each and every chapter of maths. I used to consider maths as another memorizing subject that we have to keep memorizing the same formulas and types of questions. However, he changed my approach towards maths and taught me how to broaden my understanding and apply concepts that we learnt to all the different types of questions. His lessons never fail to enlighten me as his analytical and extensive explanation always allowed me to clear my doubts.

Jack has always encouraged students to ask him questions and he boosted our confident in maths by guiding us step-by-step. All I can say is that he was not just another maths teacher for me and my classmates but he is also our friend, parent and senior who always help us in maths, many other subjects and school-life too. We could learn a lot from his positive attitudes and strong belief in oneself to excel in our studies, and he constantly cheered us to stay strong during A level periods as well. Last but not least, he proved the importance of good cooperation between student and teacher as “A” cannot be solely achieved by either good teacher or smart student but only when both of them work together as one. ACHEVAS ALL THE WAY!
Olivia Kim Young Ah | Innova Junior College