What is the definition of a diagnostic assessment?

A diagnostic assessment is designed to measure students' strengths and weaknesses before instruction begins. It serves as a preliminary assessment tool that helps educators identify specific areas where students may struggle, allowing for tailored instruction that meets their individual needs. By pinpointing these strengths and weaknesses, educators can develop targeted interventions and support strategies, ensuring that each student can progress effectively in their learning journey.

In contrast, the other options focus on different aspects of assessment that do not align with the primary purpose of a diagnostic assessment. Evaluating final exams measures overall student achievement rather than identifying specific learning gaps. Methods to determine class engagement typically assess student participation and interest, which is not the same as assessing academic readiness or skill proficiency. Periodic checks of comprehension, while important, are often more formative assessments that monitor ongoing understanding rather than an initial diagnostic evaluation meant to inform instructional strategies.