Despite your best efforts, it’s likely that you will need to deal with students who violate classroom policies or otherwise interfere with the learning process. In general, these types of situations should be handled firmly and fairly when neither party is highly emotional. Depending on the situation, you may wish to deal with the student outside of class. For example, if a student is asking off-topic questions or monopolizing class discussion, a few words at the time of occurrence may be enough to prevent recurrence. On the other hand, some problems, such as sleeping during class, consistently arriving late or leaving early, or not participating, may be better addressed in private. While they might appear to be simple behavior problems, there can be other, more personal, causes.
For concerns that involve violence or threats of violence, behavior that may indicate psychological problems, or violations of student code of conduct follow the procedures outlined in the (adjunct) faculty handbook under Security.
These sites have excellent suggestions for establishing a constructive classroom environment and addressing specific classroom issues.
Difficult Behaviors in the Classroom, Honolulu Community College
Specific issues and suggested resolutions
Strategies for Dealing with Troublesome Behaviors in the Classroom