Back in my secondary school days, I have been coaching my peers in various subjects, mostly in maths.
After graduating from Poly, I went back to my secondary school as a part time teacher. During that 3 months, I taught lower sec maths and science. Most of my students not only learn the subject well, but also enjoyed my style of presentation.
My previous tutee scored a A2 for his emath in 2009 o level. Before i taught him, his standard was around c6-d7.