The document provides an overview of North Carolina's Problem Solving Model (PSM) approach to Response to Intervention (RtI). It describes the PSM as having four tiers and involving assessment through curriculum-based measurement and formative assessment. The core components of the PSM are explained as systematic analysis, functional assessment, use of data, instructional planning, plan implementation, and progress monitoring. The seven step problem-solving process is outlined, with each step defined. Implementation of RtI through the PSM tiers is discussed, with Tier IV representing potential special education referral. The goal of the PSM approach is to ensure positive student outcomes through identifying and implementing effective instructional strategies for all learners