If this is not yet a usual behavior for the youngster, give your attention immediately to reinforce that correct behavior. Verbally praise the youngster for displaying the appropriate behavior. Prevent escalation of the event. Seek solutions, not blame. Build a friendly relationship.
Persistence is required.
Assist as needed. Finally, note what happens as a result of the youngster's behavior. With this information, you should be able to make a good guess at what brings about and maintains the youngster's behavior. This information can also be used to modify or eliminate the behavior. When dealing with student misbehavior, the trick is to figure out what is maintaining the behavior and then manipulate the environment so that behavior no longer receives that reward.