Challenging behaviors can happen to children with a variety of abilities in all kinds of settings, and children's early experiences as members of classroom communities serve as the foundation on which lifelong patterns of social behaviors are constructed. Therefore, helping children with challenging behaviors become fully included is essential for them to grow and thrive in the future. This article examines why challenging behaviors are great obstacles for children's learning and growth in the classrooms and uses four real life examples to demonstrate strategies to prevent and eliminate behavior problems among preschoolers. All strategies are evidence-based and easy to implement by classroom teachers.