Often the reason a student is referred for special educational services is
because the student has been disruptive. Research reported by Sugai and
Horner (2001) indicates that when PBS systems are in place, then there is
not only a reduction in the number of referrals, but also an increase in the
quality of referrals. These effects have been found to last over time when
the practices are adopted PBS systems. A positive school climate is an
important piece to the puzzle of effective school practice.