Multi-Tiered System of Supports (MTSS)¶

Strategy · All strategies
Evidence · 6 claims (4 for, 2 mixed) · 9 studies (3 review, 2 quant-synthesis, 2 qualitative, 1 causal, 1 design), q1–q4 · 2 of 9 report an effect size · 3 claims rest on one study

Description¶

MTSS is a school-wide prevention framework in which all students receive high-quality universal (Tier 1) instruction, students flagged by screening receive supplemental targeted intervention (Tier 2, typically small group), and non-responders receive intensive individualized support (Tier 3). Decisions about movement between tiers are driven by continuous progress monitoring rather than referral or diagnosis, making it a data-based system for matching instructional intensity to student need.

Response to Intervention (RTI) is an approach to academic intervention that provides early, systematic, and appropriately intensive assistance to students at risk for or already underperforming relative to peers, through universal screening, early intervention, frequent progress monitoring, and increasingly intensive research-based instruction for students who continue to struggle. It was originally proposed as an alternative to the older ability-achievement discrepancy model, which identified a specific learning disability by requiring a significant gap between a student's ability (often IQ) and their achievement (grades, standardized test scores) — a method long criticized for over-diagnosing low-performing students as disabled. RTI instead bases decisions on how a student actually responds to targeted intervention over time, rather than on a one-time discrepancy between two test scores. As the framework broadened beyond identifying learning disabilities specifically into a general educational decision-making process, the field increasingly labels it Multi-Tiered System of Supports (MTSS).

Service delivery is organized into three tiers of increasing intensity:

• Tier 1 — core curriculum instruction targeting all students. Roughly 80-85% of the general student body should meet grade-level norms through Tier 1 alone, with no additional support needed.
• Tier 2 — supplementary intervention, typically in small groups, for students who consistently underperform despite Tier 1 instruction. Roughly 3-6% of students continue to struggle even after Tier 2.
• Tier 3 — the most intensive level, typically individualized (often one-on-one) intervention delivered within the regular education environment for students who have not responded sufficiently to Tiers 1 and 2.

Because RTI/MTSS generates ongoing, evidence-based progress data at every tier, it lets educators rule out inadequate instruction as an explanation for poor performance — supporting the claim that it identifies genuine learning disabilities (or other support needs) more defensibly than a single ability-achievement discrepancy score ever could.

Design Implications¶

MTSS operationalizes prevention over remediation: the goal is to catch struggling learners early, before achievement gaps compound. Its effectiveness depends on the quality of Tier 1 instruction — a weak universal tier generates false positives that overwhelm intervention capacity — and on decision rules that are actually followed, since schools that screen but do not act on the data gain little Fletcher & Vaughn's review of response-to-intervention frameworks [+M]. Progress monitoring must be frequent and sensitive enough to detect growth within weeks, not semesters.

Context¶

Requirements¶

• Valid, brief universal screening administered 2–3 times per year to all students
• Explicit decision rules (cut scores, response criteria) specifying who moves up or down tiers
• Evidence-based Tier 2/3 intervention programs delivered with fidelity
• Frequent progress monitoring (e.g., weekly oral reading fluency probes) with graphed data reviewed by a team (Assess Performance)
• Protected time in the master schedule for intervention blocks
• A genuinely tiered response capacity: core instruction reliable enough that ~80-85% of students succeed without extra support, small-group capacity for the next tier, and individualized capacity for the smallest, most intensive tier

Constraints¶

• A school adopting the MTSS/RTI label without the underlying universal-screening and progress-monitoring infrastructure is not actually implementing the framework
• Implementation fidelity degrades when screening data are collected but tier-placement decisions are made informally or delayed [-M] — the framework's benefit collapses without systematic decision rules
• Tier 2 small-group intervention shows weaker and less consistent effects in secondary grades than in early elementary Balu et al.'s national evaluation found no significant average impact of RTI on reading for grades 4–6 [~M]
• Requires sustained resources: intervention staff, assessment platforms, and scheduling; under-resourced schools often implement only the assessment layer, producing labeling without support [-M]
• Over-identification risk: screening cut scores set too low flood Tier 2 beyond available capacity

Implementation Variability¶

• RTI variant — emphasizes tier movement based on response to intervention; often used for specific learning disability identification
• PBIS integration — behavior supports organized in the same three-tier logic, allowing a unified academic-behavior system
• Secondary adaptation — tiers map to course-based supports (advisory intervention blocks, double-dose math classes) rather than pull-out groups

Target Learners¶

• Struggling readers and students below benchmark in early grades, where Tier 2 effects are strongest Fletcher & Vaughn [+M]
• Students with weak academic self-efficacy benefit from early success experiences in matched intervention, since sustained failure erodes persistence Self-efficacy predicts academic persistence. [+M]
• All students benefit from a strengthened Tier 1; MTSS is not only for identified strugglers

Target Learning Goals¶

• Foundational literacy and numeracy skills (decoding, fluency, number sense)
• Closing achievement gaps before they compound across grades
• Behavioral and attendance outcomes when integrated with PBIS

Instructions¶

1. Screen universally. Administer brief validated screeners to all students 2–3×/year; establish cut scores in advance (Assessment).
2. Strengthen Tier 1. Verify that core instruction is explicit and well-structured before adding tiers; weak core instruction invalidates the whole system (Explicit Instruction).
3. Deliver Tier 2 in small groups. Provide supplemental targeted instruction 3–5×/week in groups of 3–5, using an evidence-based program delivered with fidelity (Coaching).
4. Monitor progress weekly. Graph student data and review at regular team meetings; adjust groupings based on trend lines, not impressions (Assess Performance).
5. Escalate non-responders to Tier 3. Provide individualized, more frequent, or more intensive intervention; use Fading to return students to lower tiers as they respond, since gradually withdrawing support promotes transfer of responsibility Fading support promotes transfer of responsibility. [+M]
6. Give feedback on process, not just outcomes. Intervention feedback should target strategies and self-regulation, where feedback effects are largest Feedback is most effective at task and process levels. [+S]

Personalization¶

• Tier assignment itself is the personalization mechanism: intensity of support scales with documented student need rather than being fixed in advance

Claims¶

• CSPP pre-referral processes mirror the K-12 MTSS approach and apply fundamentally the same steps to ML and non-ML children [~W]
• Data-based decision making is the least-met full-implementation criterion while universal screening is the most-met [~W]
• Ivy Elementary staff jointly monitor progress toward goals in team meetings and organize tiered supports for students [+W]

Related Strategies¶

• Formative Assessment — MTSS is essentially formative assessment institutionalized at the school level
• Direct Instruction — the typical instructional mode of Tier 2/3 intervention groups
• Competency-Based Learning — shares the logic of advancement by demonstrated mastery rather than time
• Use ongoing assessments to tailor early-childhood learning experiences
• Use a multi-stage screening tool (SSBD) to nominate and rank at-risk students for behavioral intervention
• Select Tier 2 literacy interventions by weighing ESSA evidence ratings, cost, feasibility, and use of the supplemental matrix for homegrown designs
• Use Early Warning Indicator (EWI) and Multi-Tiered Systems of Support (MTSS) for continuous improvement
• Sustain and resource statewide PBIS scale-up with emphasis on advanced-tier implementation support
• Organize student well-being supports through a three-tier MTSS with universal screening
• Implement multi-tiered supports focused on acceleration, not remediation
• Invest state discretionary dollars in early intervention systems such as MTSS to reduce later intensive supports
• Organize integrated support systems as universal, supplemental, and intensive tiers
• MTSS wraparound services with adequate counseling ratios and continuous improvement monitoring
• Screen for and monitor children at risk of nonresponse to universal SWPBIS and target nonresponders for more intensive tiered interventions
• Use two-stage gated screening: an early reading screen followed by several weeks of progress monitoring before confirming at-risk status

Examples¶

• National Center on Intensive Intervention — provides tools charts rating the evidence base and efficacy of academic and behavior intervention programs for Tier 3 selection.
• DIBELS 8th Edition — widely used universal screening and progress-monitoring measures for early literacy, with benchmark goals that drive tier placement decisions.
• Minnesota's MTSS implementation framework — a state-level model integrating academic and behavioral tiers with required decision rules and fidelity checks.

Key Sources¶

• Fuchs, D., & Fuchs, L. S. (2006). Introduction to response to intervention: What, why, and how valid is it? Reading Research Quarterly, 41(1), 93–99. doi:10.1598/RRQ.41.1.4
• Fletcher, J. M., & Vaughn, S. (2009). Response to intervention: Preventing and remediating academic difficulties. Child Development Perspectives, 3(1), 30-37. doi:10.1111/j.1750-8606.2008.00072.x
• Balu, R., Zhu, P., Doolittle, F., Schiller, E., Jenkins, J., & Gersten, R. (2015). Evaluation of response to intervention practices for elementary school reading (NCEE 2016-4000). National Center for Education Evaluation and Regional Assistance. https://ies.ed.gov/ncee/pubs/20154001/
• Gersten, R., Beckmann, S., Clarke, B., Foegen, A., Marsh, L., Star, J. R., & Witzel, B. (2009). Assisting students struggling with mathematics: Response to Intervention (RtI) for elementary and middle schools (NCEE 2009-4060). National Center for Education Evaluation and Regional Assistance. https://ies.ed.gov/ncee/wwc/PracticeGuide/2
• Hattie, J., & Timperley, H. (2007). The power of feedback. Review of Educational Research, 77(1), 81–112. doi:10.3102/003465430298487
• Arduini-Van Hoose, N. (2020). Teaching students with disabilities. In Educational psychology. Retrieved from https://edpsych.pressbooks.sunycreate.cloud. CC BY-NC-SA 4.0.