My 6 year old granddaughter has difficulty sitting in kindergarten, finishing work we know she can do and following teacher instructions. Parents have punished, talked to her, rewarded the few times she comes home with a good report. We have no idea how to help her with this problem.
Sorry about that. I advise you see a pediatrician to rule out an Attention Deficit and Hyperactivity Disorder, ADHD.in the interim, try to reinforce the behavior you like in your grandchild. I hope this help.