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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 85.2
2. OnlineMedEd 50.4
3. Master the Boards USMLE Step 2 CK 24.8
4. First Aid for the USMLE Step 2 CK Clinical Knowledge 19.3
5. Step-Up to Medicine 16.9
6. Anki 13.3
7. USMLE Step 2 Secrets 11.0
8. Dr. Pestana's Surgery Notes 5.1
9. Kaplan Qbank 4.7
10. SketchyMedical 4.4
11. Step-Up to USMLE Step 2 4.2
12. COMBANK 3.8
13. First Aid for the Psychiatry Clerkship 2.8
14. Kaplan High Yield Lectures 2.8
15. USMLE Step 2 CK Lecture Notes: Internal Medicine 2.5
16. USMLE Step 2 CK Lecture Notes: Pediatrics 2.5
17. Doctors in Training 2018 2.3
18. USMLE Step 2 CK Lecture Notes: Psychiatry and Epidemiology & Ethics 2.1
19. Flashback 2.1
20. USMLE Step 2 CK Lecture Notes: Surgery 2.1

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