MTSS Framework
MTSS involves universal support for all, targeted intervention for some, and intensive intervention for a smaller number of students.
Tier 1 includes universal, evidence-based, high-quality instruction and support for all students. Tier 1 is designed to prevent skill gaps and challenges from developing, and to catch them early when they do.
Tier 2 provides evidence-based targeted intervention and support, usually delivered in small groups, to address a student’s gaps in skills. Tier 2 instruction layers on top of and does not replace tier 1 instruction and supports provided to all students.
Tier 3 involves intensive intervention and support, usually delivered more often, in smaller groups, and more individualized to support significant and/or persistent skill gaps and challenges.

Tiers within MTSS