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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 69.2
2. Master the Boards USMLE Step 2 CK 38.0
3. OnlineMedEd 24.9
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 24.5
5. Step-Up to Medicine 18.4
6. Master the Boards USMLE Step 3 13.8
7. USMLE Step 2 Secrets 13.8
8. USMLE Step 2 CK Lecture Notes: Internal Medicine 11.0
9. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 11.0
10. USMLE Step 2 CK Lecture Notes: Pediatrics 10.7
11. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 10.0
12. Kaplan High Yield Lectures 9.3
13. USMLE Step 2 CK Lecture Notes: Surgery 8.9
14. Kaplan Qbank 8.6
15. Dr. Pestana's Surgery Notes 8.2
16. Anki 7.2
17. Toronto Notes 6.1
18. Step-Up to USMLE Step 2 5.6
19. COMBANK 4.7
20. Doctors in Training 2016 4.0

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