Positive Behavior Interventions and Supports (PBIS) includes a cascade of supports ranging from primary prevention (Tier 1) efforts for all, secondary prevention (Tier 2) efforts for some, and tertiary prevention (Tier 3) efforts for a few. These supports increase in intensity as students move through the continuum of tiered supports. For example, Tier 1 efforts are intended to level the playing field for all students, and the expectation is about 80% of the student body will respond to this school-wide approach to PBIS. Tier 2 supports are for students with common acquisition (can’t do problems), fluency (trouble doing problems), or performance (won’t do problems) deficits. These low-intensity supports can be delivered in small groups (e.g., social skills groups) or individually (e.g., check/in check/out). Tier 3 ...