To examine the key factors that lead to effective implementation of school-wide behavior interventions, this study examined the extent to which school-wide behavior interventions were implemented in four Hong Kong schools. The study also explored Hong Kong teachers' beliefs about behavioral and social skill programs for secondary students with social, emotional, and behavioral difficulties. Findings indicated that the adoption of behavioral and social skill programs were common practices in schools and that the majority of participants in the present study believed that behavioral and social skill programs should be implemented in schools at an early stage. Furthermore, findings suggested that it is important to consider the interrelationship of professional, strategic, contextual, and attitudinal factors that support students' social competence and minimize their challenging behavior.