The six elements of MTSS (Multi-Tiered System of Supports) are universal screening, data-based decision making, a multi-level prevention system (Tiers 1, 2, and 3), evidence-based interventions, progress monitoring, and fidelity of implementation. These elements work together as an integrated framework that helps schools identify struggling students early and match them with the right level of academic and behavioral support.
While some states organize their MTSS frameworks into five or seven components, the six-element structure is widely used across districts and is the version most educators encounter in training and professional development. Here is what each element means in practice.
Universal Screening
Universal screening is the starting point of the entire framework. Schools administer brief, standardized assessments to every student, typically three times per year: fall, winter, and spring. The purpose is not to diagnose a specific problem but to flag students who may be at risk for academic or behavioral difficulties before those difficulties become severe.
Screening tools cover foundational skills like reading fluency, math computation, or social-emotional functioning. Because every student takes the same assessment, schools get a snapshot of how the whole student body is performing. That data helps teams identify which students need additional support and which are on track with core instruction alone. Without universal screening, schools rely on teacher referrals or failing grades to identify struggling students, which often means intervention starts too late.
Data-Based Decision Making
Data-based decision making is the process schools use to interpret screening results, progress monitoring data, and other information to determine what kind of support each student needs. Rather than relying on gut feelings or anecdotal observations, teams follow a structured problem-solving process: define the concern, analyze why it is happening, develop a plan, and evaluate whether the plan is working.
Leadership teams at both the district and school level regularly review data to make decisions about resource allocation, instructional changes, and individual student plans. Effective data-based decision making depends on having a system that provides frequent, up-to-date reports so teams are not working with outdated information. This element ties every other part of MTSS together, because screening, progress monitoring, and tier placement all depend on how well teams use data to guide their choices.
Multi-Level Prevention System
The tiered structure is the most recognizable feature of MTSS. It organizes instruction and intervention into three levels of increasing intensity.
- Tier 1 (Universal): High-quality core instruction delivered to all students. This is the general classroom experience, including both academic curriculum and schoolwide behavioral expectations. A well-functioning Tier 1 should meet the needs of roughly 80% of students. When schools find that Tier 1 is not sufficient, the first step is to strengthen core instruction rather than immediately moving students into intervention groups.
- Tier 2 (Supplemental): Small-group, targeted support for students who are not making adequate progress with Tier 1 instruction alone. Tier 2 interventions are typically standardized programs delivered in groups of three to eight students, focusing on specific skill gaps like phonics, reading comprehension, or behavioral self-regulation. These sessions usually happen in addition to core instruction, not as a replacement.
- Tier 3 (Intensive): Individualized, high-intensity intervention for students with persistent difficulties. Tier 3 supports are more frequent, longer in duration, and more narrowly targeted than Tier 2. At this level, families are intentionally included in the decision-making process, and educators develop individualized plans based on diagnostic data.
Students move between tiers based on their response to intervention. A student who makes strong progress in Tier 2 may return to Tier 1 supports only. A student who does not respond to Tier 2 may be moved to Tier 3 for more intensive help.
Evidence-Based Interventions
MTSS requires that the instructional practices and intervention programs used at every tier have a research base demonstrating their effectiveness. This means schools cannot simply choose any program or strategy. They need to select curricula and interventions that have been studied in rigorous settings and shown to produce positive outcomes for students with similar needs.
At Tier 1, this translates to using a core curriculum with strong research support. At Tiers 2 and 3, it means selecting intervention programs that match the specific skill deficits identified through screening and diagnostic assessment. The emphasis on evidence helps prevent schools from investing time and resources in approaches that sound appealing but lack proof of impact. Professional learning opportunities for teachers and staff play a key role here, as educators need training to deliver these practices correctly.
Progress Monitoring
While universal screening gives a broad snapshot a few times per year, progress monitoring tracks individual students on an ongoing basis. Students receiving Tier 2 or Tier 3 interventions are assessed more frequently, often weekly or biweekly, using brief measures that are sensitive to small changes in performance.
The purpose is to answer a specific question: is this intervention working for this student? If progress monitoring data shows a student is responding well, the team may continue or begin fading the intervention. If the data shows little or no growth after a reasonable period, the team adjusts the plan, perhaps by increasing the frequency of sessions, trying a different instructional approach, or moving the student to a more intensive tier. Consistent progress monitoring practices ensure that students are not left in interventions that are not helping them.
Fidelity of Implementation
Fidelity refers to whether the MTSS framework and its interventions are being carried out as intended. A research-backed reading intervention will not produce the expected results if it is delivered inconsistently, with the wrong materials, or for fewer minutes than the program requires. Fidelity checks help schools determine whether a poor outcome reflects an ineffective intervention or an intervention that was never properly implemented in the first place.
Schools monitor fidelity through classroom observations, coaching, implementation checklists, and regular review by leadership teams. This element also extends to the broader infrastructure: are leadership teams meeting regularly, are data systems functioning, and are staff receiving the professional development they need? Sustainability depends on having effective structures in place to evaluate whether the entire system is operating as designed, not just whether individual teachers are following lesson plans.
How the Six Elements Connect
These six elements are not independent steps that happen in sequence. They operate as a continuous cycle. Universal screening identifies students who need help. Evidence-based interventions are selected and delivered at the appropriate tier. Progress monitoring tracks whether those interventions are working. Data-based decision making drives every adjustment, from changing an individual student’s plan to rethinking how Tier 1 instruction is delivered schoolwide. Fidelity checks ensure the whole system is functioning as intended.
Leadership and infrastructure hold the cycle together. Schools that implement MTSS effectively have leadership teams at both the district and building level with clearly defined roles. These teams include administrators, certified and classified staff, family representatives, and community partners. They are responsible for creating a shared vision, aligning resources, supporting professional learning, and sustaining the framework over time. Without that organizational commitment, individual elements tend to break down or operate in isolation, which defeats the purpose of an integrated system.
Family engagement runs through every tier as well. Families are informed when their child begins receiving intervention, including details about what skills are being targeted, how long the intervention will last, and how progress will be communicated. For students in Tier 3, families are more actively involved in planning decisions. Keeping families informed and engaged strengthens the support students receive both at school and at home.