I had been a teacher assistant in an English center and I also was a teacher in a Kumon center, moreover, I taught my tutor students math. All of them are focused on primary students.
Kumon center culture
There are about 20,000 Kumon centers in Taiwan, and many of them which is called "after-school center" is a place with teachers assist primary students to do their homework and prepare their school's tests after school.
In Taiwan, there are lots of parents hire tutors to teach their children all kinds of subjects, especially math and English. Hourly pay is about $10 - $30 per hour. Nowadays, lots of online English tutor platforms have sprung up.