This is not so absolute. Although one-on-one teaching will make teachers know more about children's situation, there is no atmosphere of collective teaching.

If you want the teacher to know about the children's situation and have the atmosphere of collective teaching, I recommend you to try New Oriental, which is really great.

Before the placement, we should analyze the weak situation of the subject, find out the children's learning situation, and then stimulate the children's interest in learning in the form of classroom interactive games. It is the best educational institution I have seen in these years.