What principle should guide the evaluation of instructional changes within a Tiered Instruction framework?

The principle guiding the evaluation of instructional changes within a Tiered Instruction framework is that changes should be data-driven and rooted in student performance. This approach ensures that decisions are based on objective, measurable evidence rather than subjective opinions or preferences. By focusing on data, educators can accurately assess the effectiveness of instructional strategies and interventions, allowing for adjustments that directly address students' needs. This method aligns with best practices in special education, where individualized and tailored support is crucial for student success. Utilizing data helps identify learning gaps, monitor progress, and refine instructional methods, ultimately leading to improved outcomes for students in a Tiered Instruction framework.