What is the Check-In, Check-Out process, and at what tier does it occur? Question content area bottom Part 1 A. A Tier 3 process in which teams analyze the function of a student's problem behavior. B. A Tier 2 process for using special education services when necessary. C. A Tier 1 process in which schools develop universal expectations. D. A Tier 2 process in which students meet with an adult mentor to get feedback throughout the day