When planning reading intervention, which principle of structured literacy involves using progress monitoring data?

The principle of structured literacy that emphasizes using progress monitoring data is the one that regards instruction as diagnostic. This approach involves continually assessing a learner's reading abilities to identify their strengths and weaknesses. By analyzing this data, educators can tailor instructional strategies to meet the specific needs of each student, adjusting interventions based on ongoing performance.

Using progress monitoring allows teachers to make informed decisions about instructional planning and to understand when to modify teaching techniques or provide additional support. The diagnostic aspect ensures that interventions are not based on one-size-fits-all methods but rather on precise information about a student's reading skills and challenges. This leads to more effective teaching that can significantly enhance learning outcomes for students with dyslexia and other reading difficulties.

While the other options touch on various aspects of instruction, they do not specifically highlight the integration of ongoing assessment and data-driven decision-making, which are central to a diagnostic approach in structured literacy.