Tier 1 instruction refers to the universal, evidence-based teaching practices designed to meet the needs of at least 80% of students within the general education classroom. It involves delivering a standards-aligned curriculum to all students using effective, research-based instructional strategies. This foundational level of instruction includes differentiation to address students' varying levels of readiness, interests, and learning profiles, ensuring that each learner is engaged and supported appropriately.

A key component of Tier 1 instruction is the use of universal screening and ongoing formative assessments to monitor student progress and guide instructional decisions. Classroom management and clearly defined behavioral expectations also play a vital role, helping to create a positive and productive learning environment.

Tier 1 instruction is proactive and preventative in nature, aiming to address learning needs before they require more intensive intervention. It is data-driven, consistently evaluated for effectiveness, and includes culturally responsive practices to ensure all students feel represented and supported. Collaboration among educators is essential to maintain consistency and equity across classrooms. When implemented effectively, Tier 1 instruction ensures that the majority of students are able to succeed without the need for additional tiers of intervention.