Each assignment page will have a button or a link that you can use to submit your solution. You can upload files either from file system the machine at which you are browsing or directly from your CS Unix account.

The submissions page will also allow you to check to see if a prior submission has been graded and to view the most recent grade report. In most cases, you should have received this report by e-mail, but this provides you a backup in case the email message disappears into the Internet ether.