Response to intervention (RTI) is a comprehensive, systematic approach to teaching and learning designed to monitor academic and behavioral progress for all students, provide early interventions of increasing intensity to struggling learners, and potentially identify learners with more significant learning disabilities. The model is implemented with multitiered instruction, intervention, and assessment. The key components of the RTI model include (1) high-quality instruction matched to the needs of students, (2) evidence-based interventions of increasing intensity, (3) ongoing progress monitoring, and (4) data-driven decision making. Components of the model, such as data-driven decision making and multitiered instruction, have been studied for the past few decades, but the model as an integrated whole has been developed more recently. One catalyst for increased research and interest in RTI has been a change in federal legislation in the United States. The most recent reauthorization of the Individuals with Disabilities Education Improvement Act (IDEA) in 2004 permits the RTI model to be implemented as an alternative means to identify students with learning disabilities (LDs). These amendments to IDEA stipulate that the RTI process may be used to determine if a child is responding to research-based instruction and intervention as part of the special education evaluation process. Although driven by special education policy, RTI has been lauded as an instructional model that can improve general education overall and for special populations. However, critiques of the model argue that it has been implemented with limited research, resources, and funding and may not be valid for identifying LDs. Some experts question the psychometric validity of the model and promote using multiple forms of assessment, including more traditional standardized psycho-educational tests, in combination with RTI when evaluating students for possible LDs.
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