Supplementary materials can enhance a strong application and may help tip the admission decision in your favor. However, use discretion when deciding whether to send additional information in support of your application. Think about how many applications, including essays, test scores, activities lists, recommendations and test scores admissions officers are sorting through to help them make their decisions.
Submit supplements to your application only if you feel very strongly that this extra information will add value to your application and tell Admissions something about yourself they cannot learn from your application. Make sure what you submit is of the highest caliber and will enhance your profile. If you’re not sure about what to do, it may be helpful to ask your guidance counselor for input. In addition, confirm each individual school’s policy regarding the submission of supplementary materials and follow the required format for submission by checking on the school’s admissions website.
Tufts University Admissions offers an amazing flow chart to help you decide whether or not to send in additional materials.