vCases are realistic, virtual case workups in which students develop and demonstrate their clinical reasoning skills. They do this by reviewing a virtual patient's medical record and presenting complaint, asking questions about the patient's symptoms, selecting physical exams to look for pertinent signs, ordering appropriate tests and procedures, narrowing the differential diagnosis before reaching a final diagnosis, and finally receiving personalized feedback that compares their choices and decisions with those of an experienced clinician. In this way, vCases can provide faculty members with detailed insights into their students’ diagnostic skills and approaches, making it easy to determine if a given student is struggling with how to best approach patient workups.