Throughout the RTI process, it’s important that schools and districts collect and analyze data to determine how effectively staff are implementing RTI. Specifically, schools must monitor the fidelity of implementation for RTI’s main components: universal screening, high-quality instruction, progress monitoring, and data-based decision making. Although school personnel might be implementing one or more of these components correctly, they might well be implementing others without fidelity. This monitoring should take place at each level of support.