A 3-year study in eight middle schools tested a program to improve ado
lescent conduct. The program sought to increase clarity of school rule
s and consistency of rule enforcement, improve classroom organization
and management, increase the frequency of communication with the home
regarding student behavior, and increase reinforcement of appropriate
behavior. An organization development approach provided a context to a
chieve strong implementation by increasing communication, collaboratio
n, and planning at the school level. The strength and fidelity of impl
ementation differed across schools. In schools in which the program wa
s well-implemented student conduct improved significantly.