In Program 1 meet Ra-Shaan, a high school freshman, and watch as she and her classmates experience RTI from the student's perspective. Classroom scenes show how teachers, administrators, and specialists use the results of universal screening and diagnostic tests in a problem-solving activity known as Five Reasons Deep analysis. See how a collaborative team designs specific interventions targeted to the root causes of low achievement. And delve into a three-tiered instructional intervention that features research-based strategies for : Tier 1 classrooms that meet the needs of most students. Tier 2 classrooms for students needing interventions of moderate intensity. Tier 3 classes for small groups of students in need of longer and more frequent interventions.