In eucation, Response To Intervention (commonly abbreviated RTI or RtI) is a method of academic intervention used in the United States designed to provide early, effective assistance to children who are having difficulty learning. Response to intervention was also designed to function as a data-based process of diagnosing learning disabilities. This method can be used at the group and individual level. The RTI method has been developed by researchers as an alternative to identifying learning disabilities with the ability-achievement discrepancy model, which requires children to exhibit a severe discrepancy between their IQ and academic achievement as measured by standardized tests. Further, the RTI process brings more clarity to the Specific Learning Disability (SLD) category of the Individuals with Disabilities Education Improvement Act (IDEA 2004), which has been referred to as a residual category for children with moderate learning problems.