“The exams are called “shelf exams” because they consist of “shelved” (expired) USMLE Step 1 and Step 2 CK questions from old exams.” (How to Prepare for Shelf Exams—2024 Guide | Med School Insiders. (2023, November 16). Med School Insiders. Retrieved July 10, 2024, from https://medschoolinsiders.com/medical-student/shelf-exam-guide/)