Submit photos or video of testing as well as some of the feedback you received from your users. Did testing help you answer important questions like: What worked well? What was confusing or didn’t work? How do you know your prototypes solve your problem? What improved or positive outcomes did your users have as a result of your design? Did your prototypes work equally well for all users? See Section 6.1 of your playbook, "Iterating to Improve Outcomes," for more information.