What is the primary distinction between diagnostic and formative assessments?

The primary distinction between diagnostic and formative assessments lies in their purposes and the timing of their implementation within the educational process. Diagnostic assessments are specifically designed to identify a student’s pre-existing knowledge, skills, and understandings before learning begins. This helps educators gauge where students are in their learning journey and tailor instruction accordingly to meet individual needs.

In contrast, formative assessments are conducted during the learning process. They provide ongoing feedback that helps both teachers and students understand progress and areas for improvement. These assessments allow for adjustments to instruction while learning is still taking place, promoting student growth and understanding over time.

This clear focus of diagnostic assessments on pre-existing knowledge sets them apart from formative assessments, which are more about continuous monitoring and supporting learning throughout a course or school year.