Featured Terms | Glossary
Validity: An indication that an assessment instrument consistently measures what it is designed to measure, excluding extraneous features from such measurement. More »
Voices From the Field

"Integrating RTI into your classrooms is not a quick fix. An open mind and a lot of patience are essential, as it often requires a paradigm shift for educators." [Read full story »]

— Mary Anne Lesiak, Director of Education, AppleTree Institute for Education Innovation, DC

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Ask the Experts

When implementing RTI, is there a recommended ratio of students to teachers at different tiers of intervention?

Response from Amanda VanDerHeyden, Ph.D.: The feature that distinguishes one tier of intervention from another is intensity. Tier 1 intervention is typical instruction to which all students in the class are exposed...[read full response]

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Include Essential Components

In order for RTI to work, the essential components must be implemented rigorously and with integrity. Only then will parents and school staff know the type and intensity of intervention needed for each student to succeed.


High Quality Classroom Instruction

High-Quality Classroom Instruction

Make sure all students receive high-quality, research-based instruction in the general education classroom.

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 Tiered Instruction/Intervention

Tiered Instruction/ Intervention

Find information here to help you ensure that students receive increasingly intensive, multi-tiered instruction and intervention matched to their individual needs.

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Ongoing Student Assessment

Ongoing Student Assessment

Learn how progress measures can be used for screening to identify students at risk of school failure and for evaluating the impact of instructional changes.

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Family Involvement

Collaborate with parents to provide the best learning opportunities in school, at home, and in community settings.

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