Current public health reports show that early childhood behavior problems have increased in magnitude and prevalence in educational settings in recent years (Brauner & Stephens, 2006). The prevalence of problem behaviors in young children in general is more than 10% for children under age 8 in the U.S. (Joseph & Strain, 2003). Challenging behaviors are those that deviate from the expected appropriate behaviors within a context (Gresham & Elliot, 1993). This study investigated the effects of positive behavior supports (PBS) on children with challenging behaviors in early childhood settings (ages 3-8 years). The implementation of multiple-component PBS interventions resulted in decreases in challenging behaviors and increases in appropriate behaviors across settings for each participant, respectively.