Hi Mr Koh wishing you a very happy teachers day!! even though i hv only joined your class recently and have only attended 5 of your lessons, i am really grateful for your patient guidance, kindness and passion in teaching us econs, the times where you would extend your lessons for 30min just to answer our questions even though you have to rush off for lessons, as well as being there to help us online, not forgetting the extra 30min before official lessons started to explain with such great details questions i had. once again happy teachers day mr koh!!