Incidents of aggressive behaviors tracked in 35 Head Start classrooms (14 centers, approximately 700 students) decreased significantly over a two-year period.

Classroom staff recorded cumulative incidents of biting, screaming, pulling hair, spitting, pushing, hitting and grabbing items from others during a 4-hour period (9:00AM to 12:00PM) on four consecutive days. Conscious Discipline implementation incepted with training on brain functioning and Composure (Year 1). Training focused on three skills in Year 2 (Encouragement, Assertiveness, and Choices) and the remaining skills in Year 3.

Source: Oakes, P. (2009, 2011)