PBS is a process for creating safer and more effective schools. It is a systems approach to enhancing the capacity of schools to educate all children by developing research-based, school-wide, and classroom behavior support systems.
The process focuses on improving a school’s ability to teach and support positive behavior for all students. Rather than a prescribed program, PBS provides systems for schools to design, implement, and evaluate effective school-wide, classroom, non-classroom, and student specific plans. PBS includes school-wide procedures and processes intended for all students and all staff in all settings.
PBS is not a program or a curriculum. It is a team-based process for systemic problem solving, planning, and evaluation. It is an approach to creating a safe and productive learning environment where teachers can teach and all students can learn.
(from PBIS TA Center Resource: Example Letter to Parent- Elementary School Example (North Carolina)