40 people with Multiple Sclerosis, who routinely use ambulatory assistive devices and have fallen at least once in the past year, will be randomized into two groups. One group will receive a 6-week training program in the use of their assistive device; the other group will be wait-listed, and may choose to receive the training after their participation in the study is completed. All participants will receive mobility assessments at baseline, 6-8 weeks later, and 3 months after that. All participants will record their falls on falls calendars. Participants in the training group will receive MRI scans to assess neural connectivity at baseline and after completion of the training program.