This study reduced the disruptive behaviors of students in two elementary physical education classes: a regular fourth-grade class comprised of 30 students and an alternative education class containing 14 fourth- and fifth-grade boys with severe behavior problems. Using a multiple baseline design, we introduced a modified time-out procedure called "Sit and Watch." The procedure reduced the frequency of disruptive behaviors by 95%. Sit and Watch proved to be socially acceptable to parents, school personnel, and the physical education teacher.