This module outlines the differences between the IQ-achievement discrepancy model and the Response-to-Intervention (RTI) approach. It also offers a brief overview of each tier in the RTI model and explains its benefits.
This module was developed in collaboration with the Tennessee State Improvement Grant and the Tennessee Department of Education.
The IRIS Center
Special Education Resources for Inclusion,
Scientifically Validated and Evidence-Based Instructional Strategies