1. Communicate with children: First of all, parents need to communicate with their children to understand why their children are not good. It may be because of the pressure of study, or it may be because of the bad relationship between classmates. Only by knowing the root of the problem can we carry out targeted education.

2. Set rules: Parents can set some rules of behavior with their children, such as not playing mobile phones in class and not interrupting others at will. And let the children understand the consequences of violating the rules.

3. Establish a reward and punishment mechanism: Parents should praise and reward their children's good behaviors, such as buying their favorite toys or snacks. For bad behavior, parents should also have appropriate punishment, such as limiting children's play time.

4. Enhance children's self-control ability: Parents can help children improve their self-control ability through some games or activities. For example, play some games that require patience, or participate in some activities that require teamwork.

5. Seek professional help: If the child's behavior problem is very serious, parents may need to seek the help of professional psychological counselors. They can provide more professional suggestions and methods to help children correct bad behaviors.