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Here are the most popular resources that people use for the USMLE Step 2 CK on Cram Fighter. These aren't necessarily the best study resources, but they should be a good starting point.

Rank Title (all editions) % of students used
1. UWorld 73.5
2. Master the Boards USMLE Step 2 CK 36.3
3. OnlineMedEd 30.4
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 24.5
5. Step-Up to Medicine 24.1
6. USMLE Step 2 Secrets 14.9
7. Anki 9.4
8. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 9.0
9. Master the Boards USMLE Step 3 8.3
10. USMLE Step 2 CK Lecture Notes: Internal Medicine 7.7
11. Step-Up to USMLE Step 2 7.7
12. USMLE Step 2 CK Lecture Notes: Pediatrics 7.2
13. COMBANK 7.0
14. USMLE Step 2 CK Lecture Notes: Surgery 7.0
15. SketchyMedical 6.6
16. Dr. Pestana's Surgery Notes 6.1
17. Kaplan Qbank 5.9
18. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 5.9
19. Kaplan High Yield Lectures 5.3
20. Kaplan OnlinePrep Lectures 3.1

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