When should a teacher administer a diagnostic reading test to improve instructional planning?

Administering a diagnostic reading test whenever formative assessments indicate a need is essential for tailoring instruction to meet students' specific needs. This approach allows teachers to collect timely and relevant information about student progress and challenges. By responding to the results of formative assessments, educators can identify gaps in knowledge or skills that need addressing, ensuring that instruction is targeted and effective.

This method acknowledges that literacy development can vary among students throughout the school year, and timely assessments can guide interventions or adjustments in teaching strategies. It prevents the assumption that a single test at the beginning or set intervals is sufficient to capture the ongoing growth and needs of learners, promoting a responsive and adaptable teaching environment.