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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 72.2
2. Master the Boards USMLE Step 2 CK 37.6
3. OnlineMedEd 30.2
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 23.8
5. Step-Up to Medicine 20.7
6. USMLE Step 2 Secrets 13.6
7. Master the Boards USMLE Step 3 11.1
8. USMLE Step 2 CK Lecture Notes: Internal Medicine 9.8
9. Anki 9.3
10. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 9.3
11. USMLE Step 2 CK Lecture Notes: Pediatrics 8.2
12. Dr. Pestana's Surgery Notes 8.0
13. Kaplan Qbank 7.8
14. USMLE Step 2 CK Lecture Notes: Surgery 7.8
15. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 7.6
16. Step-Up to USMLE Step 2 7.1
17. COMBANK 6.7
18. Kaplan High Yield Lectures 6.2
19. Toronto Notes 5.3
20. SketchyMedical 4.7

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