The document discusses the transition of North Carolina's RtI model from four tiers to three tiers. It provides the history and objectives of RtI in NC. The key aspects are: - NC defines RtI as a multi-tiered framework to promote school improvement through engaging instruction and a problem-solving model based on data. - The three-tier model places more focus on the core for all students, increases emphasis on general education, and integrates with PBIS. - Tier I is differentiated core instruction for all students. Tier II provides supplemental support for about 20% of students. Tier III offers intensive support for around 5% of students needing additional help.