Every assignment page on this website specifies how to turn in the work—while most will be turned in on Dropbox, some must be printed out and turned in in person and some will be completed directly on Slack—so you should always check an assignment's page to see exactly what to do.
When the instructions say something like "This assignment should be uploaded to your Submitted folder on Dropbox by classtime on" such-and-such day, you should do just that—upload your assignment to your Submitted folder by the specified time. If you fail to get the assignment uploaded on time, you can still turn it in late (unless the assignment description specifies that you can't); just upload it to the "Submitted Late" folder instead.
Once I grade your work, I'll move it to the "Graded" folder. There, you'll be able to see what score you received on the work and any feedback I gave you.
Unless otherwise specified, every assignment you upload to your Dropbox for me to grade must be a .docx file. It doesn't matter if you use Microsoft Word, Open Office, Google Docs, Apple Pages, or another word-processing program, you must submit your work as a .docx file or I will not grade it. Virtually all word-processing software will allow you to save in this format (a quick Google search can dig up instructions if you can't figure it out).
Second, every assignment you upload to your Dropbox for me to grade should follow this naming convention:
Last Name, Assignment Name.docx
Of course, substitute your own last name and the assignment name as appropriate for each assignment. I will not grade assignments that are misnamed.
Please remember that I have 50 students, so whatever shenanigans one student pulls are potentially multiplied by 50. Imagine getting 50 documents called "english-assignment-lol.docx" and "untitled.pages" and trying to figure out who turned in what and what program can open them all. It's a headache. Up until recently, I've always required paper submissions of all assignments because it avoids file format and naming problems altogether, though it did cost my students a pretty penny for printing. I'm saving you the money, so please save me the trouble.