Specially designed instruction (SDI) is backed by federal legislation. Students with disabilities are entitled to SDI. As a result, it is extremely important that all school partners truly understand what SDI is and what it is not. Specifically, what should SDI look like in Virginia’s mathematics classrooms? As you explore this document, take time to ponder the individual needs of students with disabilities in your classroom. This will drive planning efforts to ensure successful implementation of SDI for students who need it the most. It is important to understand that data is the starting point for SDI. Friend and Barron (2021) indicate that planning for SDI should begin with data obtained from students’ special education services.