I emailed my regional admissions officer regarding whether or not there would be a supplement. Her response is similar to @marijke 's post. Here’s her reply:
Thanks for reaching out!
You are welcome to submit additional information after you submit the Common Application. Once you submit your application, within three days you will receive an NUID and you will be able to access your Application Status Check. On this page, you can submit supplemental materials. This is not required and is not an official supplement, but this will give you the opportunity to submit additional material. There will be further instructions there about what type of material we suggest you submit.
Please let me know if you have any further questions!
Best,
Alice
Alice Smith | Assistant Director
Office of Undergraduate Admissions
Northeastern University
150 West Village F, 360 Huntington Ave, Boston MA 02115
617.373.5412 (direct line) | 617.373.2200 (main line) | 617.373.8780 (fax)
www.northeastern.edu/admissions
Connect with @NUAdmissions: Twitter | Instagram | Facebook