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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 77.3
2. Master the Boards USMLE Step 2 CK 36.7
3. OnlineMedEd 32.4
4. Step-Up to Medicine 25.1
5. First Aid for the USMLE Step 2 CK Clinical Knowledge 22.0
6. USMLE Step 2 Secrets 14.9
7. Anki 8.9
8. Master the Boards USMLE Step 3 8.4
9. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 6.9
10. Kaplan Qbank 6.7
11. SketchyMedical 6.3
12. USMLE Step 2 CK Lecture Notes: Internal Medicine 6.3
13. USMLE Step 2 CK Lecture Notes: Surgery 6.0
14. COMBANK 5.8
15. USMLE Step 2 CK Lecture Notes: Pediatrics 5.6
16. Dr. Pestana's Surgery Notes 5.4
17. Step-Up to USMLE Step 2 5.4
18. Kaplan High Yield Lectures 5.2
19. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 4.1
20. Crush Step 2: The Ultimate USMLE Step 2 Review 3.2

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