They have trouble concentrating in school.
The first grade classroom can be a noisy place. Kids are constantly bothering other kids. If adults can’t focus in this environment, you can imagine how tough it is for children.
What you should do: Keep in touch with your child’s teacher to be aware of his classroom behavior. Enforce the same rules at home that your child has at school. This helps your child understand appropriate behavior and become comfortable with the expectations of adults.