This evaluation brief identifies the average time between initial PBIS training at each tier and identifies criteria state-level leadership teams use to determine readiness for Tier 2 and 3 training. The sample includes 2,488 U.S. schools across five states trained between the 2005-06 and 2018-19 school years. Findings indicate that the average time between Tier 2 and 3 training was shorter compared to Tier 1 and Tier 2. In addition, state-level leadership teams used a variety of policies and procedures for determining school readiness for training at Tiers 2 and 3.