Computers, video games etc. have absorbed so much of our children's time that we often forget about real interaction. We also forget about the effects of TV as it relates to young children and their functioning in the classroom.
No matter your philosophy of education or your educational beliefs, one thing holds true for all classrooms -- a behavior management system should be implemented consistently from day one.
Because misbehavior is symptomatic of an underlying disability that's intensified by situational triggers, behavior plans should more aptly be thought of as teaching plans.