The main reason … QUALITY!
After working in numerous Hong Kong public and private institutions, in my humble opinion, the way that information is transferred from teacher to student isn’t very efficient. Students come in, listen, and because of the large class sizes there is practically no feedback, when there is no feedback teachers have a hard time understanding individual problems and students are equally confused. Therefore, I’m consciously concentrating more on helping my students and parents fulfill their long term educational needs through my teachings. I personally feel better and it makes me happier if I can help the minority where it matters.
Quality of my teaching is the reason, it’s as simple as that!