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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Gap Analysis

Gap Analysis is a tool for measuring the difference between the student's current level of performance and benchmark expectations.

Gifted Student

A student who demonstrates a high degree of intellectual and/or creative ability(ies), exhibits an exceptionally high degree of motivation, and/or excels in specific academic fields, and who needs special instruction and/or special ancillary services to achieve at levels commensurate with his or her abilities.


The straight line connecting a student’s baseline level of performance with his or her long‐range goal; the slope of the aimline shows the expected rate of improvement if the student is going to meet the long‐range goal. See Aimline.

Growth Chart

Graphical display of individual student’s growth and performance in a particular skill or set of skills.