It's best to find a Chinese teacher in the best high school in your city to tutor your children. A class is about tens of yuan. Although it's expensive, it's really much better than those knockoffs outside. Those tutors outside claim to hire famous teachers, but in fact they are not very good teachers in the country or cities to make money. Think about it, who will be a good tutor? I took it all home.

I've experienced it myself.