Right environment breeds perfection:
Learning anything, if done in the right environment can lead to greater understanding and absorption of the subject. Like in the case of learning a new language, if books, videos, and people speaking in that particular language surround a person, then even unconsciously a person is picking up on the nuances of the language without sometimes realizing it as well.
When searching for an English tuition Singapore for your child, one can keep in mind that the overall ambience and structure of a place go a long way in helping the child learn. It is not just the teacher who needs to be competent.