What is the RTI three-tier model?

Tier 1 is high-quality core instruction for all students (80–90% should reach benchmarks). Tier 2 provides targeted small-group interventions for students 1–2 years below benchmark (10–15%). Tier 3 provides intensive individualised support for students with the most significant needs (5–10%). Progress monitoring every 2–4 weeks determines movement between tiers.

How does RTI relate to special education identification?

Under IDEA 2004, RTI data can be used as part of the evaluation process for specific learning disability identification. Inadequate response to well-implemented Tier 2 and Tier 3 interventions provides evidence for special education eligibility, replacing the discrepancy model in many states.

RTI Tier Placement Criteria Calculator

Formula Definitions

The RTI Tier Placement Criteria Calculator works by applying a well-defined formula to the values you enter. Understanding the formula behind the calculation helps you interpret the result and check that your inputs are correct. Below we break down the key components that drive the RTI Tier Placement.

The core formula used by this calculator is:

Result = f(inputs, settings)

Each variable in the formula has a specific meaning:

inputs — Values entered into the RTI Tier Placement.
settings — Options, units, or parameters that adjust how the calculation is performed.
Result — Computed output for the chosen inputs and settings.

How to Use This Calculator

Enter the required values. Enter the required values into the RTI Tier Placement Criteria Calculator input fields.
Adjust settings. Adjust any settings, select applicable options, or choose units as needed.
Calculate the result. Press Calculate to compute the result using the underlying formula.
Interpret the output. Review and interpret your result using the provided context, reference ranges, or explanatory notes.

Glossary and Definitions

Input: A value entered into the calculator to be processed.
Output: The computed result returned by the calculator for the given inputs.
Setting: An option that adjusts how the calculation is performed, such as unit selection or mode.
Response to Intervention: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.
RTI tier: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.
MTSS: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.
Benchmark assessment: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.
Grade level norms: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.
Intervention placement: A key concept referenced by the RTI Tier Placement: Calculate Response to Intervention (RTI) tier placement criteria based on benchmark assessment performance relative to grade-level norms. Tier 1: 80–85% of students at benchmark; Tier 2: 10–15% requiring targeted intervention; Tier 3: 5–10% requiring intensive support.