The question for a business person is: what will bring in the clients?
In cram schools the factors are; happy students; happy parents.
So the next logical question is: What makes students and parents happy?
Most students are happy when they have fun.
IMHO all students like to learn on a sub-conscious level, but as for day to day conscious thinking it is “how interesting, fun or boring was class today?”
If over a long period the student cannot see improvement in their Enlglish ability (and they don’t have the choice not to go to Cram school) The having fun part will be very dominant in their outlook.
There are some students (and I have had some very young ones who don’t want to play games even when they are educational), they want to learn English.
The parents are happy when their children are not complaining about Cram school and their children’s English is improving.
A teacher can write a test to reflect the student’s ability, or to show the student can get 100% on all tests.
If the students are getting 100% on all tests then most parents will assume their children are improving.
If the students “like” going to Cram school the parents will think it is a good Cram school and it is one less thing to worry about.
As a sweeping generalisation, laoban’s want to make the students happy, so that the parents are happy.
This in no way rules out that laobans’ are serious educators.
The fact is the bottom line is $$$ for everybody, laoban, teacher, parent.