Researchers at the National Center for Student Progress Monitoring studied a Response to Instruction model as a method of identifying children for special education services. To judge responsiveness, curriculum-based measures of oral reading fluency were used to monitor progress. This process generated a number of examples of how weekly progress monitoring, which includes systematic data interpretation and teacher action, is central to good decision making in an RtI framework. Two children are discussed whose profiles illustrate different aspects of the progress monitoring-RtI interface. The document is available here.