Best JC/IP Chemistry Tuition

Skyrocket Your Chem Grades with Ex-RJC Lecturer Mr Donnell Koh and Singapore’s Most Popular Chemistry Tuition Since 2008!

Students can choose either to attend physical or livestream lessons. However due to social distancing measures, physical classroom lessons are currently capped at max of 15 per class.

Lessons are taught from scratch so to ensure every single student have the foundation that is needed to understand each topic holistically and thoroughly. We leave no stones unturned. Lessons are carried out first by going through the concepts followed by problem solving. This allows students to see and understand how the concepts are linked to commonly tested prelim and A level questions. The questions are carefully curated by the teachers with their vast experience in the subject.

Junior College education is merely a short 2 years and the learning pace is very intense. Students who struggle with Chemistry should start early as once they fallbehind, they will find it very difficult to catch up. So the advice is to seek help early and do not leave it to the last minute. Our experience is that students who start with Twig early enjoy Chemistry more and have less problem doing their tutorials/exams and do well for the final A level exams.

A Level Chemistry is a content heavy and rule-based subject. There are a lot of rules to follow and it is a huge jump from O Level Chemistry. Let’s see the differences between the different A Level Chemistry levels.

How do our chemistry lessons look like?

Lessons are carried out with the Interactive SmartBoard to keep students engaged and alert. Students are constantly being asked questions to keep the lesson interactive.

Here are just some samples of the lessons carried out in class.

Acid Base Equilibria

In this lesson, Mr Koh goes through the concept of finding the pH of a diprotic acid. Student need to make the assumption that the 2nd dissociation of the acid is negligible and the pH is calculated based on the first dissociation.


In this lesson, Mr Koh goes through the concept of SN2 explaining why the nucleophile will attack the opposite side of the halogen. The concept is explained in greater detail using a video to illustrate the mechanism to show why the product formed is inverted.


In this lesson, Mr Koh went through the homework from a question from HCI Prelim paper. Student was tested on using the formula Q = mc∆T and drawing an energy level diagram. Mr Koh goes through the thought processes as he solves the question with the students.


In this lesson, Mr Koh goes through the concept whereby an oxidising agent oxidises the 2 ions in a compound (usually it is only 1). The 2 reduction half equations have to be combined first before balancing
with the reduction half equation