Participants reported when they began preparing for the COMLEX-USA Level 1 (first year of osteopathic medical school, fall of second year [September to December], winter of second year [January to March], spring of second year [April to May]), and the number of hours they studied per week for each of the 8 weeks leading up to the examination. For each of 5 broad categories of examination preparation resources (review books, practice examinations, question banks, lecture videos, and class notes), participants reported how often they used it and, if used, how helpful it was. Both were rated using a 5-point scale, from “never” (1) to “always” (5) for the first question and from “unhelpful” (1) to “very helpful” (5) for the follow-up question. To gain more specific information regarding the resources used, participants rank-ordered the 3 most helpful resources within each of the 5 broad categories.