Just as you did when using Tier 2 Proactive Strategies, you need to take data on the Behavior Intervention Plan at Tier 3. You may use any form your district uses, but we have provided one option in the guidance document on page 56.
Take data at various times and during various activities throughout the day. After an agreed upon timeframe (e.g. 6 weeks), the team should review the data from the Tier 3 interventions and supports and make a determination whether new or additional interventions and supports are needed.
Note: Children frequently exhibit an increase in distressed behaviors initially, so it is important to consistently use agreed upon interventions and supports for a reasonable length of time (e.g. 4 weeks) before making additional changes to the formal behavior intervention plan.