What is RTI? Response to Intervention (RTI) is a multi-tier approach to early identification and support of any student with learning and/or behavior needs. No Child Left Behind Act of 2001 and Individuals with Disabilities Education Act of 2004 (IDEA) underscore the importance of providing high quality, scientifically-based instruction and interventions, and hold schools accountable for the progress of ALL students in the terms of meeting state grade level standards. Under R