First: the child is only in the sixth grade. Are you afraid that your child can't keep up with his junior high school grades or just want to lay a good foundation?
Second, are children willing to go to remedial classes? If not, it is not recommended that you register your child. You can choose one if you want. Now there are many one-on-one ones, because the effect is really good and interactive, just like Beichen. The address is No.32 Renmin Middle Road, tinghu district. I have a friend who works there. Do you want me to help you understand?