1614 male and female student-athletes from 60 teams (30 experimental, 30 control) belonging to 10 colleges/universities across all 3 NCAA Divisions completed the study. Results indicated that student-athletes who participated in the program demonstrated greater increases in concussion knowledge, intention to report concussion, understanding of the return to play protocol, other’s beliefs about reporting concussions, perceived ability to report concussions, and consequences of reporting compared to controls. These changes held at a one-month follow-up. Qualitative analysis of cognitions associated with concussion reporting indicated that there are clear thematic clusters pertaining to thoughts that prevent reporting and cognitions that may potentially improve reporting.