Teach preschoolers how to behave well. Developmentally, preschoolers are now capable of distinguishing between right and wrong and are able to follow instructions. Teach children a set of model behavior and, if necessary, implement a simple set of class rules.
Intervene before a problem escalates further. If you see a preschooler getting frustrated or two preschoolers beginning to argue with each other, intervene straightaway to diffuse the situation. Divert their attention with a new task, for example, or explain why this behavior is unacceptable.
Create a positive and supportive classroom environment. A well-organized classroom with a predictable schedule will foster positivity and good behavior. Alternate between high-energy and calm activities and eliminate any waiting-around time to prevent boredom.
Investigate any deeper issues. Continual behavior problems with a preschooler may be a symptom of a problem at home. There may be a new baby in the house or friction between parents, for example. Speak to the parents to get an overall view of their home life and work together to find a way of resolving any problems.