Browse the glossary below to learn the terms you need to know to successfully implement RTI in your school. This glossary was compiled using the following resources: The RTI Glossary of Terms developed by the IDEA Partnership @ NASDSE, the New Mexico Public Education Department RTI Glossary, and contributions from members of the RTI Action Network Advisory Council. |
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Data Points |
Points on a graph that represent student achievement or behavior relative to a specific assessment at a specific time.
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Data-Based/Data-Driven Decision Making |
A process of collecting, analyzing, and summarizing information to answer a question and to guide development, implementation, and evaluation of an action. Data-based decision making is continuous and regular, and most importantly linked to educational/socially important questions.
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Dependent Variable |
Element that may be influenced or modified by some treatment or exposure.
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Differentiated Instruction |
Process of designing lesson plans that meet the needs of the range of learners; such planning includes learning objectives, grouping practices, teaching methods, varied assignments, and varied materials chosen based on student skill levels, interest levels, and learning preferences;
differentiated instruction focuses on instructional strategies, instructional groupings, and an array of materials.
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Discrepancy |
a) Difference between two outcome measures; b) IQ-achievement discrepancy – difference between scores on a norm-referenced intelligence test and a norm-referenced achievement test; c) Difference between pre-test and post-test on a criterion-referenced test.
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Disproportionality |
The over- or under-representation of minority students in special education. In other words, there is a disproportionate number, either a significantly larger or smaller percentage, of students from a specific minority background receiving special education services than the percentage of that minority in the population generally.
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