It is critical that teachers use evidence-based practices for students with disabilities. With data, teachers can evaluate if their instruction is impactful. Teachers are encouraged to use data-based decision-making and intensive intervention to improve the outcomes of students with disabilities. With data, teachers can illustrate their instructional effectiveness or advocate for additional supports they may need. Foundational practices and components related to data use are defined with examples. Step-by-step guidance is provided for using data. Recommended practices to incorporate data into instruction and daily routines are provided with examples. Finally, resources related to how to use data in the classroom are identified.