This document provides an overview of response to intervention (RTI), including its definition, origins, core principles, and essential components for implementation. RTI is defined as providing high-quality instruction matched to student needs and using student performance data to make educational decisions. It originated from several problem-solving models and aims to provide early intervention. The core principles are intervening early, using a multi-tier model and problem-solving methodology, and making data-driven decisions. Essential components for implementation include using a multi-tier model, problem-solving methods, integrated assessment systems, and data-driven decision making.