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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 73.6
2. Master the Boards USMLE Step 2 CK 39.0
3. OnlineMedEd 27.1
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 24.4
5. Step-Up to Medicine 19.6
6. USMLE Step 2 Secrets 13.7
7. Master the Boards USMLE Step 3 13.4
8. USMLE Step 2 CK Lecture Notes: Internal Medicine 10.0
9. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 9.6
10. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 8.7
11. Dr. Pestana's Surgery Notes 8.2
12. USMLE Step 2 CK Lecture Notes: Pediatrics 8.2
13. USMLE Step 2 CK Lecture Notes: Surgery 7.7
14. Kaplan Qbank 7.5
15. Step-Up to USMLE Step 2 7.1
16. Anki 7.1
17. Kaplan High Yield Lectures 6.6
18. Toronto Notes 5.7
19. COMBANK 5.0
20. Doctors in Training 2016 4.1

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