Dynamic assessment (DA) is appealing to educational psychologists (EPs) due to: its flexibility, allowing EPs to adjust materials and processes to fit the assessment context; its usefulness, revealing ideas about how the next steps for learning might be achieved; and its focus on strengths. In Feuerstein's words, "it is the instances of success of the individual that are the focal point for analysis for the reasons of success and failure". Given the appeal of DA, it is frustrating that it has not been taken up more by practitioners. This paper will explore what DA is, and what it is not, summarise its advantages, consider why it is not more widely used, and introduce one way in which EPs can receive support for DA; using video of an EP "doing" DA within supervision in order to reflect on "good" DA.