Donnell Kohβs lessons are engaging and exam-oriented rather than just lecturing and rehashing whatβs done in school. He has a knack for pushing you to think deeply and not be lulled into thinking you understand when you actually donβt. He does so by giving tough past A level and prelim questions in the in-class worksheets after teaching each concept. This forces us to go beyond merely knowing the concepts but actually applying and internalising them. Personally, I think this was a very effective mode of learning because it preps us towards the type of questions that will be asked in the exams. To top it off, Donnell Koh authors very useful books that summaries the Chemistry H2 syllabus which proved to be invaluable to me closer to the exams.
Donnell Koh also provides ample practice before exams to cover a wide range of questions for each topic, because practice makes perfect! His delivery is also very clear, and he will provide in-depth explanations. His dedication to his students extends even beyond classroom hours. During consultations, he takes the time to help diagnose your weakness and answer as many questions as you have (which is a lot if you take H2 Chemistry).