This document discusses Response to Intervention (RTI), focusing on implementation at the primary level. It provides a brief history of RTI, outlining its origins in the 1970s-80s and its establishment as a framework in the 2004 reauthorization of IDEA. The summary describes the multi-tiered RTI framework, including universal screening and differentiated instruction at Tier 1, more targeted small group interventions at Tier 2, and individualized interventions and evaluations at Tier 3. It also lists some advantages and disadvantages of the RTI model.