Yes. SubmitBox puts files that your students submit directly into your Dropbox or Google Drive account.
No. Students only need an account with your SubmitBox to turn work in to you.
No. While SubmitBox has some elements of a learning management system, what it’s best for is collecting your students’ documents, putting them into your cloud storage app (Dropbox or Google Drive) and allowing you to put notes, corrections, and grades directly in those documents which your students can see almost instantly.
SubmitBox can easily be used along side a Learning Management System.