The USMLE Step 2 CK is the final hurdle before Match, and marks the beginning of the end of medical school. There are different schools of thought on the utility of Step 2 CK. Some people try to use the exam to make up for shortcomings on Step 1, while others decide to delay CK until late in the Fall of 4th year, so their excellent Step 1 score isn’t at risk of be tarnished by a poor performance. I myself just wanted to get the darned thing over with. I wrapped up 3rd year feeling as if rotations had gone very well, so I took 2 weeks off in the middle of July to study, and took the exam thereafter.