"Response to Intervention" (RTI) is a process that refers to how well students respond to research-based instruction. The purpose of the program is to provide a safety net for at-risk readers, some of whom have learning disabilities. At one time, students could not get help until they were failing. The idea of RTI is to catch students when they begin to struggle. RTI supports their success through scientific, research based instruction. The child is tested to see how well the instruction works.