While musculoskeletal disorders are leading causes of medical visits, musculoskeletal education is underrepresented in US medical curricula. Previous studies have demonstrated that undergraduate medical students often fail to demonstrate competency surrounding musculoskeletal disorders. More educational content is needed to support musculoskeletal knowledge in learners. We developed an online, case-based musculoskeletal module for second-year medical students alongside their standard course material and presented clinical cases with multiple-choice question quizzes regarding the presentation, diagnosis, and anatomic correlation of musculoskeletal conditions. Cases, under 10 minutes each, targeted common, medically important areas of musculoskeletal health. Grades in the required musculoskeletal course were significantly and positively correlated with online module quiz performance. 258 (73%) of 354 students completed at least one quiz, and students completed an average of 14 out of 15 quizzes. Learners who completed more than 50% of the quizzes performed significantly better in the course than those who completed fewer quizzes; this was true for a formative internal course exam (p = .035), an NBME customized assessment (p = .008), and the course overall (p = .021). Additional analyses of students' perceptions revealed that students valued the self-directed online learning environment. The high completion rate (73%) for the online module also signaled student value in the content and format. This module represents educational material that has been demonstrated to improve medical student musculoskeletal learning. Additionally, the module could be expanded to address inadequacies in orthopedic education among other students, such as allied health learners.