Fidelity is defined as doing what is intended. The purpose of measuring fidelity is to assist with supporting implementation. Collecting fidelity data provides an opportunity to problem-solve throughout the process versus waiting for outcome data. More often than not, purchased programs and curriculum materials are missing a research-validated measurement to ensure it is implemented as intended. Educational institutions may be measuring fidelity through the use of a walkthrough tool or teacher self-report, but are the tools aligned with what they want to measure (Hill & Erickson, 2019). This brief examines the concept and provides real-world examples from the Florida Department of Education, the Kentucky Department of Education, and the Minnesota Department of Education.