This lesson comes from Yale's online course Overcoming Dyslexia and focuses on the practical question of how clinicians and educators identify dyslexia in a student. The instructor walks through the assessment process, covering the cognitive and reading measures used to distinguish dyslexia from general reading difficulty, and explains why early and accurate diagnosis changes what kind of intervention a struggling reader receives. The lesson sits within a larger sequence on the science of reading and reading disorders, and treats diagnosis as a distinct skill separate from simply recognizing that a child is behind in reading. It stays close to clinical and classroom practice rather than theory, laying out what a diagnostic evaluation actually looks for and why certain tests are chosen over others. Useful for anyone wanting a concrete picture of how dyslexia assessment works in practice rather than a general overview of the condition.