Researchers from the University of South Florida and Vanderbilt University conducted a randomized study examining the implementation of the Pyramid Model. Teachers were recruited from public preschool classrooms in Florida and Tennessee that served children with, at risk for, and without disabilities. A total of 40 teachers (20 intervention; 20 control) participated and were randomly assigned to condition. Data were collected on a total of 484 children in these classrooms (252 intervention; 232 control), including two to three target children per classroom who were identified as having behavioral challenges (54 intervention; 43 control). (author abstract)