As for children's poor grades, it is impossible to generalize how long it will take to see the effect of one-on-one education in Desong, Zhenjiang. But generally speaking, a month and a half is almost enough.

First of all, it should be based on children's learning ability and understanding ability; Secondly, whether the teaching materials and educational model provided by this school teach students in accordance with their aptitude; One is the teacher's teaching method and whether he is responsible.

I suggest you make a comprehensive investigation on the teaching quality and teaching methods of this institution. If they are all good, children can see the effect after studying for about a month.