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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 71.6
2. OnlineMedEd 33.9
3. Master the Boards USMLE Step 2 CK 31.5
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 21.5
5. USMLE Step 2 Secrets 14.4
6. Step-Up to Medicine 13.1
7. Anki 8.4
8. Kaplan Qbank 6.4
9. Master the Boards USMLE Step 3 5.5
10. Step-Up to USMLE Step 2 5.3
11. Firecracker 4.7
12. SketchyMedical 3.8
13. Dr. Pestana's Surgery Notes 3.5
14. USMLE Step 2 CK Lecture Notes: Internal Medicine 3.3
15. Kaplan OnlinePrep Lectures 3.3
16. COMBANK 3.3
17. USMLE Step 2 CK Lecture Notes: Surgery 3.3
18. Kaplan High Yield Lectures 3.1
19. USMLE Step 2 CK Lecture Notes: Obstetrics and Gynecology 3.1
20. USMLE Step 2 CK Lecture Notes: Pediatrics 3.1

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