How to Ensure Success with Effective Classroom Instruction & Intervention Introduces readers to a strengthened model of RTI that emphasizes formative assessment and refining core instruction rather than relying only on multiple layers of intervention. The components for this strengthened model--RTI²--consist of: using core instruction that is responsive, standards-based, and data-driven ; building Tier 2 and Tier 3 interventions that ensure continuity and alignment among all levels of instruction ; developing a three-way feedback loop that uses formative assessment results to inform the learner, establish progress benchmarks, and improve curriculum and instruction for all students ; and establishing a way for educators and families to work together effectively.